gcc/testsuite/ChangeLog

[pf3gnuchains/gcc-fork.git] / gcc / cp / cp-tree.h

/* Definitions for C++ parsing and type checking.
   Copyright (C) 1987, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
   2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011
   Free Software Foundation, Inc.
   Contributed by Michael Tiemann (tiemann@cygnus.com)

This file is part of GCC.

GCC is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3, or (at your option)
any later version.

GCC is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with GCC; see the file COPYING3.  If not see
<http://www.gnu.org/licenses/>.  */

#ifndef GCC_CP_TREE_H
#define GCC_CP_TREE_H

#include "ggc.h"
#include "function.h"
#include "hashtab.h"
#include "vec.h"

/* In order for the format checking to accept the C++ front end
   diagnostic framework extensions, you must include this file before
   diagnostic-core.h, not after.  We override the definition of GCC_DIAG_STYLE
   in c-common.h.  */
#undef GCC_DIAG_STYLE
#define GCC_DIAG_STYLE __gcc_cxxdiag__
#if defined(GCC_DIAGNOSTIC_CORE_H) || defined (GCC_C_COMMON_H)
#error \
In order for the format checking to accept the C++ front end diagnostic \
framework extensions, you must include this file before diagnostic-core.h and \
c-common.h, not after.
#endif
#include "c-family/c-common.h"
#include "diagnostic.h"

#include "name-lookup.h"

/* Usage of TREE_LANG_FLAG_?:
   0: IDENTIFIER_MARKED (IDENTIFIER_NODEs)
      NEW_EXPR_USE_GLOBAL (in NEW_EXPR).
      DELETE_EXPR_USE_GLOBAL (in DELETE_EXPR).
      COMPOUND_EXPR_OVERLOADED (in COMPOUND_EXPR).
      TREE_INDIRECT_USING (in NAMESPACE_DECL).
      CLEANUP_P (in TRY_BLOCK)
      AGGR_INIT_VIA_CTOR_P (in AGGR_INIT_EXPR)
      PTRMEM_OK_P (in ADDR_EXPR, OFFSET_REF, SCOPE_REF)
      PAREN_STRING_LITERAL (in STRING_CST)
      DECL_PRETTY_FUNCTION_P (in VAR_DECL)
      KOENIG_LOOKUP_P (in CALL_EXPR)
      STATEMENT_LIST_NO_SCOPE (in STATEMENT_LIST).
      EXPR_STMT_STMT_EXPR_RESULT (in EXPR_STMT)
      STMT_EXPR_NO_SCOPE (in STMT_EXPR)
      BIND_EXPR_TRY_BLOCK (in BIND_EXPR)
      TYPENAME_IS_ENUM_P (in TYPENAME_TYPE)
      OMP_FOR_GIMPLIFYING_P (in OMP_FOR)
      BASELINK_QUALIFIED_P (in BASELINK)
      TARGET_EXPR_IMPLICIT_P (in TARGET_EXPR)
      TEMPLATE_PARM_PARAMETER_PACK (in TEMPLATE_PARM_INDEX)
      ATTR_IS_DEPENDENT (in the TREE_LIST for an attribute)
      CONSTRUCTOR_IS_DIRECT_INIT (in CONSTRUCTOR)
      LAMBDA_EXPR_CAPTURES_THIS_P (in LAMBDA_EXPR)
      DECLTYPE_FOR_LAMBDA_CAPTURE (in DECLTYPE_TYPE)
      VEC_INIT_EXPR_IS_CONSTEXPR (in VEC_INIT_EXPR)
      DECL_OVERRIDE_P (in FUNCTION_DECL)
      IMPLICIT_CONV_EXPR_DIRECT_INIT (in IMPLICIT_CONV_EXPR)
      TRANSACTION_EXPR_IS_STMT (in TRANSACTION_EXPR)
   1: IDENTIFIER_VIRTUAL_P (in IDENTIFIER_NODE)
      TI_PENDING_TEMPLATE_FLAG.
      TEMPLATE_PARMS_FOR_INLINE.
      DELETE_EXPR_USE_VEC (in DELETE_EXPR).
      (TREE_CALLS_NEW) (in _EXPR or _REF) (commented-out).
      ICS_ELLIPSIS_FLAG (in _CONV)
      DECL_INITIALIZED_P (in VAR_DECL)
      TYPENAME_IS_CLASS_P (in TYPENAME_TYPE)
      STMT_IS_FULL_EXPR_P (in _STMT)
      TARGET_EXPR_LIST_INIT_P (in TARGET_EXPR)
      LAMBDA_EXPR_MUTABLE_P (in LAMBDA_EXPR)
      DECL_FINAL_P (in FUNCTION_DECL)
      QUALIFIED_NAME_IS_TEMPLATE (in SCOPE_REF)
   2: IDENTIFIER_OPNAME_P (in IDENTIFIER_NODE)
      ICS_THIS_FLAG (in _CONV)
      DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (in VAR_DECL)
      STATEMENT_LIST_TRY_BLOCK (in STATEMENT_LIST)
      TYPENAME_IS_RESOLVING_P (in TYPE_NAME_TYPE)
      LAMBDA_EXPR_DEDUCE_RETURN_TYPE_P (in LAMBDA_EXPR)
      TARGET_EXPR_DIRECT_INIT_P (in TARGET_EXPR)
   3: (TREE_REFERENCE_EXPR) (in NON_LVALUE_EXPR) (commented-out).
      ICS_BAD_FLAG (in _CONV)
      FN_TRY_BLOCK_P (in TRY_BLOCK)
      IDENTIFIER_CTOR_OR_DTOR_P (in IDENTIFIER_NODE)
      BIND_EXPR_BODY_BLOCK (in BIND_EXPR)
      DECL_NON_TRIVIALLY_INITIALIZED_P (in VAR_DECL)
   4: TREE_HAS_CONSTRUCTOR (in INDIRECT_REF, SAVE_EXPR, CONSTRUCTOR,
          or FIELD_DECL).
      IDENTIFIER_TYPENAME_P (in IDENTIFIER_NODE)
      DECL_TINFO_P (in VAR_DECL)
   5: C_IS_RESERVED_WORD (in IDENTIFIER_NODE)
      DECL_VTABLE_OR_VTT_P (in VAR_DECL)
   6: IDENTIFIER_REPO_CHOSEN (in IDENTIFIER_NODE)
      DECL_CONSTRUCTION_VTABLE_P (in VAR_DECL)
      TYPE_MARKED_P (in _TYPE)

   Usage of TYPE_LANG_FLAG_?:
   0: TYPE_DEPENDENT_P
   1: TYPE_HAS_USER_CONSTRUCTOR.
   2: unused
   3: TYPE_FOR_JAVA.
   4: TYPE_HAS_NONTRIVIAL_DESTRUCTOR
   5: CLASS_TYPE_P (in RECORD_TYPE and UNION_TYPE)
      ENUM_FIXED_UNDERLYING_TYPE_P (in ENUMERAL_TYPE)
   6: TYPE_DEPENDENT_P_VALID

   Usage of DECL_LANG_FLAG_?:
   0: DECL_ERROR_REPORTED (in VAR_DECL).
      DECL_TEMPLATE_PARM_P (in PARM_DECL, CONST_DECL, TYPE_DECL, or TEMPLATE_DECL)
      DECL_LOCAL_FUNCTION_P (in FUNCTION_DECL)
      DECL_MUTABLE_P (in FIELD_DECL)
      DECL_DEPENDENT_P (in USING_DECL)
   1: C_TYPEDEF_EXPLICITLY_SIGNED (in TYPE_DECL).
      DECL_TEMPLATE_INSTANTIATED (in a VAR_DECL or a FUNCTION_DECL)
      DECL_MEMBER_TEMPLATE_P (in TEMPLATE_DECL)
      FUNCTION_PARAMETER_PACK_P (in PARM_DECL)
      USING_DECL_TYPENAME_P (in USING_DECL)
   2: DECL_THIS_EXTERN (in VAR_DECL or FUNCTION_DECL).
      DECL_IMPLICIT_TYPEDEF_P (in a TYPE_DECL)
   3: DECL_IN_AGGR_P.
   4: DECL_C_BIT_FIELD (in a FIELD_DECL)
      DECL_ANON_UNION_VAR_P (in a VAR_DECL)
      DECL_SELF_REFERENCE_P (in a TYPE_DECL)
      DECL_INVALID_OVERRIDER_P (in a FUNCTION_DECL)
   5: DECL_INTERFACE_KNOWN.
   6: DECL_THIS_STATIC (in VAR_DECL or FUNCTION_DECL).
      DECL_FIELD_IS_BASE (in FIELD_DECL)
      TYPE_DECL_ALIAS_P (in TYPE_DECL)
   7: DECL_DEAD_FOR_LOCAL (in VAR_DECL).
      DECL_THUNK_P (in a member FUNCTION_DECL)
      DECL_NORMAL_CAPTURE_P (in FIELD_DECL)
   8: DECL_DECLARED_CONSTEXPR_P (in VAR_DECL, FUNCTION_DECL)

   Usage of language-independent fields in a language-dependent manner:

   TYPE_ALIAS_SET
     This field is used by TYPENAME_TYPEs, TEMPLATE_TYPE_PARMs, and so
     forth as a substitute for the mark bits provided in `lang_type'.
     At present, only the six low-order bits are used.

   TYPE_LANG_SLOT_1
     For an ENUMERAL_TYPE, this is ENUM_TEMPLATE_INFO.
     For a FUNCTION_TYPE or METHOD_TYPE, this is TYPE_RAISES_EXCEPTIONS

  BINFO_VIRTUALS
     For a binfo, this is a TREE_LIST.  There is an entry for each
     virtual function declared either in BINFO or its direct and
     indirect primary bases.

     The BV_DELTA of each node gives the amount by which to adjust the
     `this' pointer when calling the function.  If the method is an
     overridden version of a base class method, then it is assumed
     that, prior to adjustment, the this pointer points to an object
     of the base class.

     The BV_VCALL_INDEX of each node, if non-NULL, gives the vtable
     index of the vcall offset for this entry.

     The BV_FN is the declaration for the virtual function itself.

     If BV_LOST_PRIMARY is set, it means that this entry is for a lost
     primary virtual base and can be left null in the vtable.

   BINFO_VTABLE
     This is an expression with POINTER_TYPE that gives the value
     to which the vptr should be initialized.  Use get_vtbl_decl_for_binfo
     to extract the VAR_DECL for the complete vtable.

   DECL_VINDEX
     This field is NULL for a non-virtual function.  For a virtual
     function, it is eventually set to an INTEGER_CST indicating the
     index in the vtable at which this function can be found.  When
     a virtual function is declared, but before it is known what
     function is overridden, this field is the error_mark_node.

     Temporarily, it may be set to a TREE_LIST whose TREE_VALUE is
     the virtual function this one overrides, and whose TREE_CHAIN is
     the old DECL_VINDEX.  */

/* Language-specific tree checkers.  */

#define VAR_OR_FUNCTION_DECL_CHECK(NODE) \
  TREE_CHECK2(NODE,VAR_DECL,FUNCTION_DECL)

#define VAR_FUNCTION_OR_PARM_DECL_CHECK(NODE) \
  TREE_CHECK3(NODE,VAR_DECL,FUNCTION_DECL,PARM_DECL)

#define VAR_TEMPL_TYPE_OR_FUNCTION_DECL_CHECK(NODE) \
  TREE_CHECK4(NODE,VAR_DECL,FUNCTION_DECL,TYPE_DECL,TEMPLATE_DECL)

#define VAR_TEMPL_TYPE_FIELD_OR_FUNCTION_DECL_CHECK(NODE) \
  TREE_CHECK5(NODE,VAR_DECL,FIELD_DECL,FUNCTION_DECL,TYPE_DECL,TEMPLATE_DECL)

#define BOUND_TEMPLATE_TEMPLATE_PARM_TYPE_CHECK(NODE) \
  TREE_CHECK(NODE,BOUND_TEMPLATE_TEMPLATE_PARM)

#if defined ENABLE_TREE_CHECKING && (GCC_VERSION >= 2007)
#define THUNK_FUNCTION_CHECK(NODE) __extension__                        \
({  __typeof (NODE) const __t = (NODE);                                 \
    if (TREE_CODE (__t) != FUNCTION_DECL || !__t->decl_common.lang_specific \
        || !__t->decl_common.lang_specific->u.fn.thunk_p)               \
      tree_check_failed (__t, __FILE__, __LINE__, __FUNCTION__, 0);     \
     __t; })
#else
#define THUNK_FUNCTION_CHECK(NODE) (NODE)
#endif
\f
/* Language-dependent contents of an identifier.  */

struct GTY(()) lang_identifier {
  struct c_common_identifier c_common;
  cxx_binding *namespace_bindings;
  cxx_binding *bindings;
  tree class_template_info;
  tree label_value;
};

/* In an IDENTIFIER_NODE, nonzero if this identifier is actually a
   keyword.  C_RID_CODE (node) is then the RID_* value of the keyword,
   and C_RID_YYCODE is the token number wanted by Yacc.  */

#define C_IS_RESERVED_WORD(ID) TREE_LANG_FLAG_5 (ID)

#define LANG_IDENTIFIER_CAST(NODE) \
        ((struct lang_identifier*)IDENTIFIER_NODE_CHECK (NODE))

struct GTY(()) template_parm_index_s {
  struct tree_common common;
  int index;
  int level;
  int orig_level;
  int num_siblings;
  tree decl;
};
typedef struct template_parm_index_s template_parm_index;

struct GTY(()) ptrmem_cst {
  struct tree_common common;
  tree member;
};
typedef struct ptrmem_cst * ptrmem_cst_t;

#define IDENTIFIER_GLOBAL_VALUE(NODE) \
  namespace_binding ((NODE), global_namespace)
#define SET_IDENTIFIER_GLOBAL_VALUE(NODE, VAL) \
  set_namespace_binding ((NODE), global_namespace, (VAL))
#define IDENTIFIER_NAMESPACE_VALUE(NODE) \
  namespace_binding ((NODE), current_namespace)
#define SET_IDENTIFIER_NAMESPACE_VALUE(NODE, VAL) \
  set_namespace_binding ((NODE), current_namespace, (VAL))

#define CLEANUP_P(NODE)         TREE_LANG_FLAG_0 (TRY_BLOCK_CHECK (NODE))

#define BIND_EXPR_TRY_BLOCK(NODE) \
  TREE_LANG_FLAG_0 (BIND_EXPR_CHECK (NODE))

/* Used to mark the block around the member initializers and cleanups.  */
#define BIND_EXPR_BODY_BLOCK(NODE) \
  TREE_LANG_FLAG_3 (BIND_EXPR_CHECK (NODE))
#define FUNCTION_NEEDS_BODY_BLOCK(NODE) \
  (DECL_CONSTRUCTOR_P (NODE) || DECL_DESTRUCTOR_P (NODE) \
   || LAMBDA_FUNCTION_P (NODE))

#define STATEMENT_LIST_NO_SCOPE(NODE) \
  TREE_LANG_FLAG_0 (STATEMENT_LIST_CHECK (NODE))
#define STATEMENT_LIST_TRY_BLOCK(NODE) \
  TREE_LANG_FLAG_2 (STATEMENT_LIST_CHECK (NODE))

/* Nonzero if this statement should be considered a full-expression,
   i.e., if temporaries created during this statement should have
   their destructors run at the end of this statement.  */
#define STMT_IS_FULL_EXPR_P(NODE) TREE_LANG_FLAG_1 ((NODE))

/* Marks the result of a statement expression.  */
#define EXPR_STMT_STMT_EXPR_RESULT(NODE) \
  TREE_LANG_FLAG_0 (EXPR_STMT_CHECK (NODE))

/* Nonzero if this statement-expression does not have an associated scope.  */
#define STMT_EXPR_NO_SCOPE(NODE) \
   TREE_LANG_FLAG_0 (STMT_EXPR_CHECK (NODE))

/* Returns nonzero iff TYPE1 and TYPE2 are the same type, in the usual
   sense of `same'.  */
#define same_type_p(TYPE1, TYPE2) \
  comptypes ((TYPE1), (TYPE2), COMPARE_STRICT)

/* Returns nonzero iff NODE is a declaration for the global function
   `main'.  */
#define DECL_MAIN_P(NODE)                               \
   (DECL_EXTERN_C_FUNCTION_P (NODE)                     \
    && DECL_NAME (NODE) != NULL_TREE                    \
    && MAIN_NAME_P (DECL_NAME (NODE))                   \
    && flag_hosted)

/* The overloaded FUNCTION_DECL.  */
#define OVL_FUNCTION(NODE) \
  (((struct tree_overload*)OVERLOAD_CHECK (NODE))->function)
#define OVL_CHAIN(NODE)      TREE_CHAIN (NODE)
/* Polymorphic access to FUNCTION and CHAIN.  */
#define OVL_CURRENT(NODE)       \
  ((TREE_CODE (NODE) == OVERLOAD) ? OVL_FUNCTION (NODE) : (NODE))
#define OVL_NEXT(NODE)          \
  ((TREE_CODE (NODE) == OVERLOAD) ? TREE_CHAIN (NODE) : NULL_TREE)
/* If set, this was imported in a using declaration.
   This is not to confuse with being used somewhere, which
   is not important for this node.  */
#define OVL_USED(NODE)          TREE_USED (NODE)
/* If set, this OVERLOAD was created for argument-dependent lookup
   and can be freed afterward.  */
#define OVL_ARG_DEPENDENT(NODE) TREE_LANG_FLAG_0 (OVERLOAD_CHECK (NODE))

struct GTY(()) tree_overload {
  struct tree_common common;
  tree function;
};

/* Returns true iff NODE is a BASELINK.  */
#define BASELINK_P(NODE) \
  (TREE_CODE (NODE) == BASELINK)
/* The BINFO indicating the base from which the BASELINK_FUNCTIONS came.  */
#define BASELINK_BINFO(NODE) \
  (((struct tree_baselink*) BASELINK_CHECK (NODE))->binfo)
/* The functions referred to by the BASELINK; either a FUNCTION_DECL,
   a TEMPLATE_DECL, an OVERLOAD, or a TEMPLATE_ID_EXPR.  */
#define BASELINK_FUNCTIONS(NODE) \
  (((struct tree_baselink*) BASELINK_CHECK (NODE))->functions)
/* The BINFO in which the search for the functions indicated by this baselink
   began.  This base is used to determine the accessibility of functions
   selected by overload resolution.  */
#define BASELINK_ACCESS_BINFO(NODE) \
  (((struct tree_baselink*) BASELINK_CHECK (NODE))->access_binfo)
/* For a type-conversion operator, the BASELINK_OPTYPE indicates the type
   to which the conversion should occur.  This value is important if
   the BASELINK_FUNCTIONS include a template conversion operator --
   the BASELINK_OPTYPE can be used to determine what type the user
   requested.  */
#define BASELINK_OPTYPE(NODE) \
  (TREE_CHAIN (BASELINK_CHECK (NODE)))
/* Nonzero if this baselink was from a qualified lookup.  */
#define BASELINK_QUALIFIED_P(NODE) \
  TREE_LANG_FLAG_0 (BASELINK_CHECK (NODE))

struct GTY(()) tree_baselink {
  struct tree_common common;
  tree binfo;
  tree functions;
  tree access_binfo;
};

/* The different kinds of ids that we encounter.  */

typedef enum cp_id_kind
{
  /* Not an id at all.  */
  CP_ID_KIND_NONE,
  /* An unqualified-id that is not a template-id.  */
  CP_ID_KIND_UNQUALIFIED,
  /* An unqualified-id that is a dependent name.  */
  CP_ID_KIND_UNQUALIFIED_DEPENDENT,
  /* An unqualified template-id.  */
  CP_ID_KIND_TEMPLATE_ID,
  /* A qualified-id.  */
  CP_ID_KIND_QUALIFIED
} cp_id_kind;


/* The various kinds of C++0x warnings we encounter. */

typedef enum cpp0x_warn_str
{
  /* extended initializer lists */
  CPP0X_INITIALIZER_LISTS,
  /* explicit conversion operators */
  CPP0X_EXPLICIT_CONVERSION,
  /* variadic templates */
  CPP0X_VARIADIC_TEMPLATES,
  /* lambda expressions */
  CPP0X_LAMBDA_EXPR,
  /* C++0x auto */
  CPP0X_AUTO,
  /* scoped enums */
  CPP0X_SCOPED_ENUMS,
  /* defaulted and deleted functions */
  CPP0X_DEFAULTED_DELETED,
  /* inline namespaces */
  CPP0X_INLINE_NAMESPACES,
  /* override controls, override/final */
  CPP0X_OVERRIDE_CONTROLS,
  /* non-static data member initializers */
  CPP0X_NSDMI,
  /* user defined literals */
  CPP0X_USER_DEFINED_LITERALS,
  /* delegating constructors */
  CPP0X_DELEGATING_CTORS
} cpp0x_warn_str;
  
/* The various kinds of operation used by composite_pointer_type. */

typedef enum composite_pointer_operation
{
  /* comparison */
  CPO_COMPARISON,
  /* conversion */
  CPO_CONVERSION,
  /* conditional expression */
  CPO_CONDITIONAL_EXPR
} composite_pointer_operation;

/* Possible cases of expression list used by build_x_compound_expr_from_list. */
typedef enum expr_list_kind {
  ELK_INIT,             /* initializer */
  ELK_MEM_INIT,         /* member initializer */
  ELK_FUNC_CAST         /* functional cast */
} expr_list_kind; 

/* Possible cases of implicit bad rhs conversions. */
typedef enum impl_conv_rhs {
  ICR_DEFAULT_ARGUMENT, /* default argument */
  ICR_CONVERTING,       /* converting */
  ICR_INIT,             /* initialization */
  ICR_ARGPASS,          /* argument passing */
  ICR_RETURN,           /* return */
  ICR_ASSIGN            /* assignment */
} impl_conv_rhs;

/* Possible cases of implicit or explicit bad conversions to void. */
typedef enum impl_conv_void {
  ICV_CAST,            /* (explicit) conversion to void */
  ICV_SECOND_OF_COND,  /* second operand of conditional expression */
  ICV_THIRD_OF_COND,   /* third operand of conditional expression */
  ICV_RIGHT_OF_COMMA,  /* right operand of comma operator */
  ICV_LEFT_OF_COMMA,   /* left operand of comma operator */
  ICV_STATEMENT,       /* statement */
  ICV_THIRD_IN_FOR     /* for increment expression */
} impl_conv_void;

/* Macros for access to language-specific slots in an identifier.  */

#define IDENTIFIER_NAMESPACE_BINDINGS(NODE)     \
  (LANG_IDENTIFIER_CAST (NODE)->namespace_bindings)
#define IDENTIFIER_TEMPLATE(NODE)       \
  (LANG_IDENTIFIER_CAST (NODE)->class_template_info)

/* The IDENTIFIER_BINDING is the innermost cxx_binding for the
    identifier.  It's PREVIOUS is the next outermost binding.  Each
    VALUE field is a DECL for the associated declaration.  Thus,
    name lookup consists simply of pulling off the node at the front
    of the list (modulo oddities for looking up the names of types,
    and such.)  You can use SCOPE field to determine the scope
    that bound the name.  */
#define IDENTIFIER_BINDING(NODE) \
  (LANG_IDENTIFIER_CAST (NODE)->bindings)

/* TREE_TYPE only indicates on local and class scope the current
   type. For namespace scope, the presence of a type in any namespace
   is indicated with global_type_node, and the real type behind must
   be found through lookup.  */
#define IDENTIFIER_TYPE_VALUE(NODE) identifier_type_value (NODE)
#define REAL_IDENTIFIER_TYPE_VALUE(NODE) TREE_TYPE (NODE)
#define SET_IDENTIFIER_TYPE_VALUE(NODE,TYPE) (TREE_TYPE (NODE) = (TYPE))
#define IDENTIFIER_HAS_TYPE_VALUE(NODE) (IDENTIFIER_TYPE_VALUE (NODE) ? 1 : 0)

#define IDENTIFIER_LABEL_VALUE(NODE) \
  (LANG_IDENTIFIER_CAST (NODE)->label_value)
#define SET_IDENTIFIER_LABEL_VALUE(NODE, VALUE)   \
  IDENTIFIER_LABEL_VALUE (NODE) = (VALUE)

/* Nonzero if this identifier is used as a virtual function name somewhere
   (optimizes searches).  */
#define IDENTIFIER_VIRTUAL_P(NODE) TREE_LANG_FLAG_1 (NODE)

/* Nonzero if this identifier is the prefix for a mangled C++ operator
   name.  */
#define IDENTIFIER_OPNAME_P(NODE) TREE_LANG_FLAG_2 (NODE)

/* Nonzero if this identifier is the name of a type-conversion
   operator.  */
#define IDENTIFIER_TYPENAME_P(NODE) \
  TREE_LANG_FLAG_4 (NODE)

/* Nonzero if this identifier is the name of a constructor or
   destructor.  */
#define IDENTIFIER_CTOR_OR_DTOR_P(NODE) \
  TREE_LANG_FLAG_3 (NODE)

/* True iff NAME is the DECL_ASSEMBLER_NAME for an entity with vague
   linkage which the prelinker has assigned to this translation
   unit.  */
#define IDENTIFIER_REPO_CHOSEN(NAME) \
  (TREE_LANG_FLAG_6 (NAME))

/* In a RECORD_TYPE or UNION_TYPE, nonzero if any component is read-only.  */
#define C_TYPE_FIELDS_READONLY(TYPE) \
  (LANG_TYPE_CLASS_CHECK (TYPE)->fields_readonly)

/* The tokens stored in the default argument.  */

#define DEFARG_TOKENS(NODE) \
  (((struct tree_default_arg *)DEFAULT_ARG_CHECK (NODE))->tokens)
#define DEFARG_INSTANTIATIONS(NODE) \
  (((struct tree_default_arg *)DEFAULT_ARG_CHECK (NODE))->instantiations)

struct GTY (()) tree_default_arg {
  struct tree_common common;
  struct cp_token_cache *tokens;
  VEC(tree,gc) *instantiations;
};


#define DEFERRED_NOEXCEPT_PATTERN(NODE) \
  (((struct tree_deferred_noexcept *)DEFERRED_NOEXCEPT_CHECK (NODE))->pattern)
#define DEFERRED_NOEXCEPT_ARGS(NODE) \
  (((struct tree_deferred_noexcept *)DEFERRED_NOEXCEPT_CHECK (NODE))->args)
#define DEFERRED_NOEXCEPT_SPEC_P(NODE)                          \
  ((NODE) && (TREE_PURPOSE (NODE))                              \
  && (TREE_CODE (TREE_PURPOSE (NODE)) == DEFERRED_NOEXCEPT      \
      || is_overloaded_fn (TREE_PURPOSE (NODE))))

struct GTY (()) tree_deferred_noexcept {
  struct tree_base base;
  tree pattern;
  tree args;
};


/* The condition associated with the static assertion.  This must be
   an integral constant expression.  */
#define STATIC_ASSERT_CONDITION(NODE) \
  (((struct tree_static_assert *)STATIC_ASSERT_CHECK (NODE))->condition)

/* The message associated with the static assertion.  This must be a
   string constant, which will be emitted as an error message when the
   static assert condition is false.  */
#define STATIC_ASSERT_MESSAGE(NODE) \
  (((struct tree_static_assert *)STATIC_ASSERT_CHECK (NODE))->message)

/* Source location information for a static assertion.  */
#define STATIC_ASSERT_SOURCE_LOCATION(NODE) \
  (((struct tree_static_assert *)STATIC_ASSERT_CHECK (NODE))->location)

struct GTY (()) tree_static_assert {
  struct tree_common common;
  tree condition;
  tree message;
  location_t location;
};

struct GTY (()) tree_argument_pack_select {
  struct tree_common common;
  tree argument_pack;
  int index;
};

/* The different kinds of traits that we encounter.  */

typedef enum cp_trait_kind
{
  CPTK_BASES,
  CPTK_DIRECT_BASES,
  CPTK_HAS_NOTHROW_ASSIGN,
  CPTK_HAS_NOTHROW_CONSTRUCTOR,
  CPTK_HAS_NOTHROW_COPY,
  CPTK_HAS_TRIVIAL_ASSIGN,
  CPTK_HAS_TRIVIAL_CONSTRUCTOR,
  CPTK_HAS_TRIVIAL_COPY,
  CPTK_HAS_TRIVIAL_DESTRUCTOR,
  CPTK_HAS_VIRTUAL_DESTRUCTOR,
  CPTK_IS_ABSTRACT,
  CPTK_IS_BASE_OF,
  CPTK_IS_CLASS,
  CPTK_IS_CONVERTIBLE_TO,
  CPTK_IS_EMPTY,
  CPTK_IS_ENUM,
  CPTK_IS_LITERAL_TYPE,
  CPTK_IS_POD,
  CPTK_IS_POLYMORPHIC,
  CPTK_IS_STD_LAYOUT,
  CPTK_IS_TRIVIAL,
  CPTK_IS_UNION,
  CPTK_UNDERLYING_TYPE
} cp_trait_kind;

/* The types that we are processing.  */
#define TRAIT_EXPR_TYPE1(NODE) \
  (((struct tree_trait_expr *)TRAIT_EXPR_CHECK (NODE))->type1)

#define TRAIT_EXPR_TYPE2(NODE) \
  (((struct tree_trait_expr *)TRAIT_EXPR_CHECK (NODE))->type2)

/* The specific trait that we are processing.  */
#define TRAIT_EXPR_KIND(NODE) \
  (((struct tree_trait_expr *)TRAIT_EXPR_CHECK (NODE))->kind)

struct GTY (()) tree_trait_expr {
  struct tree_common common;
  tree type1;
  tree type2;  
  enum cp_trait_kind kind;
};

/* Based off of TYPE_ANONYMOUS_P.  */
#define LAMBDA_TYPE_P(NODE) \
  (CLASS_TYPE_P (NODE) && LAMBDANAME_P (TYPE_LINKAGE_IDENTIFIER (NODE)))

/* Test if FUNCTION_DECL is a lambda function.  */
#define LAMBDA_FUNCTION_P(FNDECL) \
  (DECL_OVERLOADED_OPERATOR_P (FNDECL) == CALL_EXPR \
   && LAMBDA_TYPE_P (CP_DECL_CONTEXT (FNDECL)))

enum cp_lambda_default_capture_mode_type {
  CPLD_NONE,
  CPLD_COPY,
  CPLD_REFERENCE
};

/* The method of default capture, if any.  */
#define LAMBDA_EXPR_DEFAULT_CAPTURE_MODE(NODE) \
  (((struct tree_lambda_expr *)LAMBDA_EXPR_CHECK (NODE))->default_capture_mode)

/* The capture-list, including `this'.  Each capture is stored as a FIELD_DECL
 * so that the name, type, and field are all together, whether or not it has
 * been added to the lambda's class type.
   TREE_LIST:
     TREE_PURPOSE: The FIELD_DECL for this capture.
     TREE_VALUE: The initializer. This is part of a GNU extension.  */
#define LAMBDA_EXPR_CAPTURE_LIST(NODE) \
  (((struct tree_lambda_expr *)LAMBDA_EXPR_CHECK (NODE))->capture_list)

/* During parsing of the lambda, the node in the capture-list that holds
   the 'this' capture.  */
#define LAMBDA_EXPR_THIS_CAPTURE(NODE) \
  (((struct tree_lambda_expr *)LAMBDA_EXPR_CHECK (NODE))->this_capture)

/* Predicate tracking whether `this' is in the effective capture set.  */
#define LAMBDA_EXPR_CAPTURES_THIS_P(NODE) \
  LAMBDA_EXPR_THIS_CAPTURE(NODE)

/* Predicate tracking whether the lambda was declared 'mutable'.  */
#define LAMBDA_EXPR_MUTABLE_P(NODE) \
  TREE_LANG_FLAG_1 (LAMBDA_EXPR_CHECK (NODE))

/* True iff we should try to deduce the lambda return type from any return
   statement.  */
#define LAMBDA_EXPR_DEDUCE_RETURN_TYPE_P(NODE) \
  TREE_LANG_FLAG_2 (LAMBDA_EXPR_CHECK (NODE))

/* The return type in the expression.
 * NULL_TREE indicates that none was specified.  */
#define LAMBDA_EXPR_RETURN_TYPE(NODE) \
  (((struct tree_lambda_expr *)LAMBDA_EXPR_CHECK (NODE))->return_type)

/* The source location of the lambda.  */
#define LAMBDA_EXPR_LOCATION(NODE) \
  (((struct tree_lambda_expr *)LAMBDA_EXPR_CHECK (NODE))->locus)

/* The mangling scope for the lambda: FUNCTION_DECL, PARM_DECL, VAR_DECL,
   FIELD_DECL or NULL_TREE.  If this is NULL_TREE, we have no linkage.  */
#define LAMBDA_EXPR_EXTRA_SCOPE(NODE) \
  (((struct tree_lambda_expr *)LAMBDA_EXPR_CHECK (NODE))->extra_scope)

/* If EXTRA_SCOPE, this is the number of the lambda within that scope.  */
#define LAMBDA_EXPR_DISCRIMINATOR(NODE) \
  (((struct tree_lambda_expr *)LAMBDA_EXPR_CHECK (NODE))->discriminator)

/* During parsing of the lambda, a vector of capture proxies which need
   to be pushed once we're done processing a nested lambda.  */
#define LAMBDA_EXPR_PENDING_PROXIES(NODE) \
  (((struct tree_lambda_expr *)LAMBDA_EXPR_CHECK (NODE))->pending_proxies)

/* The closure type of the lambda.  Note that the TREE_TYPE of a
   LAMBDA_EXPR is always NULL_TREE, because we need to instantiate the
   LAMBDA_EXPR in order to instantiate the type.  */
#define LAMBDA_EXPR_CLOSURE(NODE) \
  (((struct tree_lambda_expr *)LAMBDA_EXPR_CHECK (NODE))->closure)

struct GTY (()) tree_lambda_expr
{
  struct tree_typed typed;
  tree capture_list;
  tree this_capture;
  tree return_type;
  tree extra_scope;
  tree closure;
  VEC(tree,gc)* pending_proxies;
  location_t locus;
  enum cp_lambda_default_capture_mode_type default_capture_mode;
  int discriminator;
};

/* A (typedef,context,usage location) triplet.
   It represents a typedef used through a
   context at a given source location.
   e.g.
   struct foo {
     typedef int myint;
   };

   struct bar {
    foo::myint v; // #1<-- this location.
   };

   In bar, the triplet will be (myint, foo, #1).
   */
struct GTY(()) qualified_typedef_usage_s {
  tree typedef_decl;
  tree context;
  location_t locus;
};
typedef struct qualified_typedef_usage_s qualified_typedef_usage_t;
DEF_VEC_O (qualified_typedef_usage_t);
DEF_VEC_ALLOC_O (qualified_typedef_usage_t,gc);

struct GTY(()) tree_template_info {
  struct tree_common common;
  VEC(qualified_typedef_usage_t,gc) *typedefs_needing_access_checking;
};

enum cp_tree_node_structure_enum {
  TS_CP_GENERIC,
  TS_CP_IDENTIFIER,
  TS_CP_TPI,
  TS_CP_PTRMEM,
  TS_CP_BINDING,
  TS_CP_OVERLOAD,
  TS_CP_BASELINK,
  TS_CP_WRAPPER,
  TS_CP_DEFAULT_ARG,
  TS_CP_DEFERRED_NOEXCEPT,
  TS_CP_STATIC_ASSERT,
  TS_CP_ARGUMENT_PACK_SELECT,
  TS_CP_TRAIT_EXPR,
  TS_CP_LAMBDA_EXPR,
  TS_CP_TEMPLATE_INFO,
  TS_CP_USERDEF_LITERAL,
  LAST_TS_CP_ENUM
};

/* The resulting tree type.  */
union GTY((desc ("cp_tree_node_structure (&%h)"),
       chain_next ("(union lang_tree_node *) c_tree_chain_next (&%h.generic)"))) lang_tree_node {
  union tree_node GTY ((tag ("TS_CP_GENERIC"),
                        desc ("tree_node_structure (&%h)"))) generic;
  struct template_parm_index_s GTY ((tag ("TS_CP_TPI"))) tpi;
  struct ptrmem_cst GTY ((tag ("TS_CP_PTRMEM"))) ptrmem;
  struct tree_overload GTY ((tag ("TS_CP_OVERLOAD"))) overload;
  struct tree_baselink GTY ((tag ("TS_CP_BASELINK"))) baselink;
  struct tree_default_arg GTY ((tag ("TS_CP_DEFAULT_ARG"))) default_arg;
  struct tree_deferred_noexcept GTY ((tag ("TS_CP_DEFERRED_NOEXCEPT"))) deferred_noexcept;
  struct lang_identifier GTY ((tag ("TS_CP_IDENTIFIER"))) identifier;
  struct tree_static_assert GTY ((tag ("TS_CP_STATIC_ASSERT"))) 
    static_assertion;
  struct tree_argument_pack_select GTY ((tag ("TS_CP_ARGUMENT_PACK_SELECT")))
    argument_pack_select;
  struct tree_trait_expr GTY ((tag ("TS_CP_TRAIT_EXPR")))
    trait_expression;
  struct tree_lambda_expr GTY ((tag ("TS_CP_LAMBDA_EXPR")))
    lambda_expression;
  struct tree_template_info GTY ((tag ("TS_CP_TEMPLATE_INFO")))
    template_info;
  struct tree_userdef_literal GTY ((tag ("TS_CP_USERDEF_LITERAL")))
    userdef_literal;
};

\f
enum cp_tree_index
{
    CPTI_JAVA_BYTE_TYPE,
    CPTI_JAVA_SHORT_TYPE,
    CPTI_JAVA_INT_TYPE,
    CPTI_JAVA_LONG_TYPE,
    CPTI_JAVA_FLOAT_TYPE,
    CPTI_JAVA_DOUBLE_TYPE,
    CPTI_JAVA_CHAR_TYPE,
    CPTI_JAVA_BOOLEAN_TYPE,

    CPTI_WCHAR_DECL,
    CPTI_VTABLE_ENTRY_TYPE,
    CPTI_DELTA_TYPE,
    CPTI_VTABLE_INDEX_TYPE,
    CPTI_CLEANUP_TYPE,
    CPTI_VTT_PARM_TYPE,

    CPTI_CLASS_TYPE,
    CPTI_UNKNOWN_TYPE,
    CPTI_INIT_LIST_TYPE,
    CPTI_DEPENDENT_LAMBDA_RETURN_TYPE,
    CPTI_VTBL_TYPE,
    CPTI_VTBL_PTR_TYPE,
    CPTI_STD,
    CPTI_ABI,
    CPTI_CONST_TYPE_INFO_TYPE,
    CPTI_TYPE_INFO_PTR_TYPE,
    CPTI_ABORT_FNDECL,
    CPTI_GLOBAL_DELETE_FNDECL,
    CPTI_AGGR_TAG,

    CPTI_CTOR_IDENTIFIER,
    CPTI_COMPLETE_CTOR_IDENTIFIER,
    CPTI_BASE_CTOR_IDENTIFIER,
    CPTI_DTOR_IDENTIFIER,
    CPTI_COMPLETE_DTOR_IDENTIFIER,
    CPTI_BASE_DTOR_IDENTIFIER,
    CPTI_DELETING_DTOR_IDENTIFIER,
    CPTI_DELTA_IDENTIFIER,
    CPTI_IN_CHARGE_IDENTIFIER,
    CPTI_VTT_PARM_IDENTIFIER,
    CPTI_NELTS_IDENTIFIER,
    CPTI_THIS_IDENTIFIER,
    CPTI_PFN_IDENTIFIER,
    CPTI_VPTR_IDENTIFIER,
    CPTI_STD_IDENTIFIER,

    CPTI_LANG_NAME_C,
    CPTI_LANG_NAME_CPLUSPLUS,
    CPTI_LANG_NAME_JAVA,

    CPTI_EMPTY_EXCEPT_SPEC,
    CPTI_NOEXCEPT_TRUE_SPEC,
    CPTI_NOEXCEPT_FALSE_SPEC,
    CPTI_JCLASS,
    CPTI_TERMINATE,
    CPTI_CALL_UNEXPECTED,
    CPTI_ATEXIT_FN_PTR_TYPE,
    CPTI_ATEXIT,
    CPTI_DSO_HANDLE,
    CPTI_DCAST,

    CPTI_KEYED_CLASSES,

    CPTI_NULLPTR,
    CPTI_NULLPTR_TYPE,

    CPTI_MAX
};

extern GTY(()) tree cp_global_trees[CPTI_MAX];

#define java_byte_type_node             cp_global_trees[CPTI_JAVA_BYTE_TYPE]
#define java_short_type_node            cp_global_trees[CPTI_JAVA_SHORT_TYPE]
#define java_int_type_node              cp_global_trees[CPTI_JAVA_INT_TYPE]
#define java_long_type_node             cp_global_trees[CPTI_JAVA_LONG_TYPE]
#define java_float_type_node            cp_global_trees[CPTI_JAVA_FLOAT_TYPE]
#define java_double_type_node           cp_global_trees[CPTI_JAVA_DOUBLE_TYPE]
#define java_char_type_node             cp_global_trees[CPTI_JAVA_CHAR_TYPE]
#define java_boolean_type_node          cp_global_trees[CPTI_JAVA_BOOLEAN_TYPE]

#define wchar_decl_node                 cp_global_trees[CPTI_WCHAR_DECL]
#define vtable_entry_type               cp_global_trees[CPTI_VTABLE_ENTRY_TYPE]
/* The type used to represent an offset by which to adjust the `this'
   pointer in pointer-to-member types.  */
#define delta_type_node                 cp_global_trees[CPTI_DELTA_TYPE]
/* The type used to represent an index into the vtable.  */
#define vtable_index_type               cp_global_trees[CPTI_VTABLE_INDEX_TYPE]

#define class_type_node                 cp_global_trees[CPTI_CLASS_TYPE]
#define unknown_type_node               cp_global_trees[CPTI_UNKNOWN_TYPE]
#define init_list_type_node             cp_global_trees[CPTI_INIT_LIST_TYPE]
#define dependent_lambda_return_type_node cp_global_trees[CPTI_DEPENDENT_LAMBDA_RETURN_TYPE]
#define vtbl_type_node                  cp_global_trees[CPTI_VTBL_TYPE]
#define vtbl_ptr_type_node              cp_global_trees[CPTI_VTBL_PTR_TYPE]
#define std_node                        cp_global_trees[CPTI_STD]
#define abi_node                        cp_global_trees[CPTI_ABI]
#define const_type_info_type_node       cp_global_trees[CPTI_CONST_TYPE_INFO_TYPE]
#define type_info_ptr_type              cp_global_trees[CPTI_TYPE_INFO_PTR_TYPE]
#define abort_fndecl                    cp_global_trees[CPTI_ABORT_FNDECL]
#define global_delete_fndecl            cp_global_trees[CPTI_GLOBAL_DELETE_FNDECL]
#define current_aggr                    cp_global_trees[CPTI_AGGR_TAG]
#define nullptr_node                    cp_global_trees[CPTI_NULLPTR]
#define nullptr_type_node               cp_global_trees[CPTI_NULLPTR_TYPE]

/* We cache these tree nodes so as to call get_identifier less
   frequently.  */

/* The name of a constructor that takes an in-charge parameter to
   decide whether or not to construct virtual base classes.  */
#define ctor_identifier                 cp_global_trees[CPTI_CTOR_IDENTIFIER]
/* The name of a constructor that constructs virtual base classes.  */
#define complete_ctor_identifier        cp_global_trees[CPTI_COMPLETE_CTOR_IDENTIFIER]
/* The name of a constructor that does not construct virtual base classes.  */
#define base_ctor_identifier            cp_global_trees[CPTI_BASE_CTOR_IDENTIFIER]
/* The name of a destructor that takes an in-charge parameter to
   decide whether or not to destroy virtual base classes and whether
   or not to delete the object.  */
#define dtor_identifier                 cp_global_trees[CPTI_DTOR_IDENTIFIER]
/* The name of a destructor that destroys virtual base classes.  */
#define complete_dtor_identifier        cp_global_trees[CPTI_COMPLETE_DTOR_IDENTIFIER]
/* The name of a destructor that does not destroy virtual base
   classes.  */
#define base_dtor_identifier            cp_global_trees[CPTI_BASE_DTOR_IDENTIFIER]
/* The name of a destructor that destroys virtual base classes, and
   then deletes the entire object.  */
#define deleting_dtor_identifier        cp_global_trees[CPTI_DELETING_DTOR_IDENTIFIER]
#define delta_identifier                cp_global_trees[CPTI_DELTA_IDENTIFIER]
#define in_charge_identifier            cp_global_trees[CPTI_IN_CHARGE_IDENTIFIER]
/* The name of the parameter that contains a pointer to the VTT to use
   for this subobject constructor or destructor.  */
#define vtt_parm_identifier             cp_global_trees[CPTI_VTT_PARM_IDENTIFIER]
#define nelts_identifier                cp_global_trees[CPTI_NELTS_IDENTIFIER]
#define this_identifier                 cp_global_trees[CPTI_THIS_IDENTIFIER]
#define pfn_identifier                  cp_global_trees[CPTI_PFN_IDENTIFIER]
#define vptr_identifier                 cp_global_trees[CPTI_VPTR_IDENTIFIER]
/* The name of the std namespace.  */
#define std_identifier                  cp_global_trees[CPTI_STD_IDENTIFIER]
#define lang_name_c                     cp_global_trees[CPTI_LANG_NAME_C]
#define lang_name_cplusplus             cp_global_trees[CPTI_LANG_NAME_CPLUSPLUS]
#define lang_name_java                  cp_global_trees[CPTI_LANG_NAME_JAVA]

/* Exception specifier used for throw().  */
#define empty_except_spec               cp_global_trees[CPTI_EMPTY_EXCEPT_SPEC]
#define noexcept_true_spec              cp_global_trees[CPTI_NOEXCEPT_TRUE_SPEC]
#define noexcept_false_spec             cp_global_trees[CPTI_NOEXCEPT_FALSE_SPEC]

/* If non-NULL, a POINTER_TYPE equivalent to (java::lang::Class*).  */
#define jclass_node                     cp_global_trees[CPTI_JCLASS]

/* The declaration for `std::terminate'.  */
#define terminate_node                  cp_global_trees[CPTI_TERMINATE]

/* The declaration for "__cxa_call_unexpected".  */
#define call_unexpected_node            cp_global_trees[CPTI_CALL_UNEXPECTED]

/* The type of the function-pointer argument to "__cxa_atexit" (or
   "std::atexit", if "__cxa_atexit" is not being used).  */
#define atexit_fn_ptr_type_node         cp_global_trees[CPTI_ATEXIT_FN_PTR_TYPE]

/* A pointer to `std::atexit'.  */
#define atexit_node                     cp_global_trees[CPTI_ATEXIT]

/* A pointer to `__dso_handle'.  */
#define dso_handle_node                 cp_global_trees[CPTI_DSO_HANDLE]

/* The declaration of the dynamic_cast runtime.  */
#define dynamic_cast_node               cp_global_trees[CPTI_DCAST]

/* The type of a destructor.  */
#define cleanup_type                    cp_global_trees[CPTI_CLEANUP_TYPE]

/* The type of the vtt parameter passed to subobject constructors and
   destructors.  */
#define vtt_parm_type                   cp_global_trees[CPTI_VTT_PARM_TYPE]

/* A TREE_LIST of the dynamic classes whose vtables may have to be
   emitted in this translation unit.  */

#define keyed_classes                   cp_global_trees[CPTI_KEYED_CLASSES]

/* Node to indicate default access. This must be distinct from the
   access nodes in tree.h.  */

#define access_default_node             null_node

/* Global state.  */

struct GTY(()) saved_scope {
  VEC(cxx_saved_binding,gc) *old_bindings;
  tree old_namespace;
  VEC(tree,gc) *decl_ns_list;
  tree class_name;
  tree class_type;
  tree access_specifier;
  tree function_decl;
  VEC(tree,gc) *lang_base;
  tree lang_name;
  tree template_parms;
  cp_binding_level *x_previous_class_level;
  tree x_saved_tree;

  /* Only used for uses of this in trailing return type.  */
  tree x_current_class_ptr;
  tree x_current_class_ref;

  int x_processing_template_decl;
  int x_processing_specialization;
  BOOL_BITFIELD x_processing_explicit_instantiation : 1;
  BOOL_BITFIELD need_pop_function_context : 1;

  int unevaluated_operand;
  int inhibit_evaluation_warnings;

  struct stmt_tree_s x_stmt_tree;

  cp_binding_level *class_bindings;
  cp_binding_level *bindings;

  struct saved_scope *prev;
};

/* The current open namespace.  */

#define current_namespace scope_chain->old_namespace

/* The stack for namespaces of current declarations.  */

#define decl_namespace_list scope_chain->decl_ns_list

/* IDENTIFIER_NODE: name of current class */

#define current_class_name scope_chain->class_name

/* _TYPE: the type of the current class */

#define current_class_type scope_chain->class_type

/* When parsing a class definition, the access specifier most recently
   given by the user, or, if no access specifier was given, the
   default value appropriate for the kind of class (i.e., struct,
   class, or union).  */

#define current_access_specifier scope_chain->access_specifier

/* Pointer to the top of the language name stack.  */

#define current_lang_base scope_chain->lang_base
#define current_lang_name scope_chain->lang_name

/* When parsing a template declaration, a TREE_LIST represents the
   active template parameters.  Each node in the list represents one
   level of template parameters.  The innermost level is first in the
   list.  The depth of each level is stored as an INTEGER_CST in the
   TREE_PURPOSE of each node.  The parameters for that level are
   stored in the TREE_VALUE.  */

#define current_template_parms scope_chain->template_parms

#define processing_template_decl scope_chain->x_processing_template_decl
#define processing_specialization scope_chain->x_processing_specialization
#define processing_explicit_instantiation scope_chain->x_processing_explicit_instantiation

/* The cached class binding level, from the most recently exited
   class, or NULL if none.  */

#define previous_class_level scope_chain->x_previous_class_level

/* A list of private types mentioned, for deferred access checking.  */

extern GTY(()) struct saved_scope *scope_chain;

struct GTY(()) cxx_int_tree_map {
  unsigned int uid;
  tree to;
};

extern unsigned int cxx_int_tree_map_hash (const void *);
extern int cxx_int_tree_map_eq (const void *, const void *);

/* Global state pertinent to the current function.  */

struct GTY(()) language_function {
  struct c_language_function base;

  tree x_cdtor_label;
  tree x_current_class_ptr;
  tree x_current_class_ref;
  tree x_eh_spec_block;
  tree x_in_charge_parm;
  tree x_vtt_parm;
  tree x_return_value;

  BOOL_BITFIELD returns_value : 1;
  BOOL_BITFIELD returns_null : 1;
  BOOL_BITFIELD returns_abnormally : 1;
  BOOL_BITFIELD x_in_function_try_handler : 1;
  BOOL_BITFIELD x_in_base_initializer : 1;

  /* True if this function can throw an exception.  */
  BOOL_BITFIELD can_throw : 1;

  htab_t GTY((param_is(struct named_label_entry))) x_named_labels;
  cp_binding_level *bindings;
  VEC(tree,gc) *x_local_names;
  htab_t GTY((param_is (struct cxx_int_tree_map))) extern_decl_map;
};

/* The current C++-specific per-function global variables.  */

#define cp_function_chain (cfun->language)

/* In a constructor destructor, the point at which all derived class
   destroying/construction has been done.  I.e., just before a
   constructor returns, or before any base class destroying will be done
   in a destructor.  */

#define cdtor_label cp_function_chain->x_cdtor_label

/* When we're processing a member function, current_class_ptr is the
   PARM_DECL for the `this' pointer.  The current_class_ref is an
   expression for `*this'.  */

#define current_class_ptr                       \
  (*(cfun && cp_function_chain                  \
     ? &cp_function_chain->x_current_class_ptr  \
     : &scope_chain->x_current_class_ptr))
#define current_class_ref                       \
  (*(cfun && cp_function_chain                  \
     ? &cp_function_chain->x_current_class_ref  \
     : &scope_chain->x_current_class_ref))

/* The EH_SPEC_BLOCK for the exception-specifiers for the current
   function, if any.  */

#define current_eh_spec_block cp_function_chain->x_eh_spec_block

/* The `__in_chrg' parameter for the current function.  Only used for
   constructors and destructors.  */

#define current_in_charge_parm cp_function_chain->x_in_charge_parm

/* The `__vtt_parm' parameter for the current function.  Only used for
   constructors and destructors.  */

#define current_vtt_parm cp_function_chain->x_vtt_parm

/* Set to 0 at beginning of a function definition, set to 1 if
   a return statement that specifies a return value is seen.  */

#define current_function_returns_value cp_function_chain->returns_value

/* Set to 0 at beginning of a function definition, set to 1 if
   a return statement with no argument is seen.  */

#define current_function_returns_null cp_function_chain->returns_null

/* Set to 0 at beginning of a function definition, set to 1 if
   a call to a noreturn function is seen.  */

#define current_function_returns_abnormally \
  cp_function_chain->returns_abnormally

/* Nonzero if we are processing a base initializer.  Zero elsewhere.  */
#define in_base_initializer cp_function_chain->x_in_base_initializer

#define in_function_try_handler cp_function_chain->x_in_function_try_handler

/* Expression always returned from function, or error_mark_node
   otherwise, for use by the automatic named return value optimization.  */

#define current_function_return_value \
  (cp_function_chain->x_return_value)

/* True if NAME is the IDENTIFIER_NODE for an overloaded "operator
   new" or "operator delete".  */
#define NEW_DELETE_OPNAME_P(NAME)               \
  ((NAME) == ansi_opname (NEW_EXPR)             \
   || (NAME) == ansi_opname (VEC_NEW_EXPR)      \
   || (NAME) == ansi_opname (DELETE_EXPR)       \
   || (NAME) == ansi_opname (VEC_DELETE_EXPR))

#define ansi_opname(CODE) \
  (operator_name_info[(int) (CODE)].identifier)
#define ansi_assopname(CODE) \
  (assignment_operator_name_info[(int) (CODE)].identifier)

/* TRUE if a tree code represents a statement.  */
extern bool statement_code_p[MAX_TREE_CODES];

#define STATEMENT_CODE_P(CODE) statement_code_p[(int) (CODE)]

enum languages { lang_c, lang_cplusplus, lang_java };

/* Macros to make error reporting functions' lives easier.  */
#define TYPE_IDENTIFIER(NODE) (DECL_NAME (TYPE_NAME (NODE)))
#define TYPE_LINKAGE_IDENTIFIER(NODE) \
  (TYPE_IDENTIFIER (TYPE_MAIN_VARIANT (NODE)))
#define TYPE_NAME_STRING(NODE) (IDENTIFIER_POINTER (TYPE_IDENTIFIER (NODE)))
#define TYPE_NAME_LENGTH(NODE) (IDENTIFIER_LENGTH (TYPE_IDENTIFIER (NODE)))

/* Nonzero if NODE has no name for linkage purposes.  */
#define TYPE_ANONYMOUS_P(NODE) \
  (TAGGED_TYPE_P (NODE) && ANON_AGGRNAME_P (TYPE_LINKAGE_IDENTIFIER (NODE)))

/* The _DECL for this _TYPE.  */
#define TYPE_MAIN_DECL(NODE) (TYPE_STUB_DECL (TYPE_MAIN_VARIANT (NODE)))

/* Nonzero if T is a class (or struct or union) type.  Also nonzero
   for template type parameters, typename types, and instantiated
   template template parameters.  Keep these checks in ascending code
   order.  */
#define MAYBE_CLASS_TYPE_P(T)                                   \
  (TREE_CODE (T) == TEMPLATE_TYPE_PARM                  \
   || TREE_CODE (T) == TYPENAME_TYPE                    \
   || TREE_CODE (T) == TYPEOF_TYPE                      \
   || TREE_CODE (T) == BOUND_TEMPLATE_TEMPLATE_PARM     \
   || TREE_CODE (T) == DECLTYPE_TYPE                    \
   || CLASS_TYPE_P (T))

/* Set CLASS_TYPE_P for T to VAL.  T must be a class, struct, or
   union type.  */
#define SET_CLASS_TYPE_P(T, VAL) \
  (TYPE_LANG_FLAG_5 (T) = (VAL))

/* Nonzero if T is a class type.  Zero for template type parameters,
   typename types, and so forth.  */
#define CLASS_TYPE_P(T) \
  (RECORD_OR_UNION_CODE_P (TREE_CODE (T)) && TYPE_LANG_FLAG_5 (T))

/* Nonzero if T is a class type but not an union.  */
#define NON_UNION_CLASS_TYPE_P(T) \
  (CLASS_TYPE_P (T) && TREE_CODE (T) != UNION_TYPE)

/* Keep these checks in ascending code order.  */
#define RECORD_OR_UNION_CODE_P(T)       \
  ((T) == RECORD_TYPE || (T) == UNION_TYPE)
#define TAGGED_TYPE_P(T) \
  (CLASS_TYPE_P (T) || TREE_CODE (T) == ENUMERAL_TYPE)
#define IS_OVERLOAD_TYPE(T) TAGGED_TYPE_P (T)

/* True if this a "Java" type, defined in 'extern "Java"'.  */
#define TYPE_FOR_JAVA(NODE) TYPE_LANG_FLAG_3 (NODE)

/* True if this type is dependent.  This predicate is only valid if
   TYPE_DEPENDENT_P_VALID is true.  */
#define TYPE_DEPENDENT_P(NODE) TYPE_LANG_FLAG_0 (NODE)

/* True if dependent_type_p has been called for this type, with the
   result that TYPE_DEPENDENT_P is valid.  */
#define TYPE_DEPENDENT_P_VALID(NODE) TYPE_LANG_FLAG_6(NODE)

/* Nonzero if this type is const-qualified.  */
#define CP_TYPE_CONST_P(NODE)                           \
  ((cp_type_quals (NODE) & TYPE_QUAL_CONST) != 0)

/* Nonzero if this type is volatile-qualified.  */
#define CP_TYPE_VOLATILE_P(NODE)                        \
  ((cp_type_quals (NODE) & TYPE_QUAL_VOLATILE) != 0)

/* Nonzero if this type is restrict-qualified.  */
#define CP_TYPE_RESTRICT_P(NODE)                        \
  ((cp_type_quals (NODE) & TYPE_QUAL_RESTRICT) != 0)

/* Nonzero if this type is const-qualified, but not
   volatile-qualified.  Other qualifiers are ignored.  This macro is
   used to test whether or not it is OK to bind an rvalue to a
   reference.  */
#define CP_TYPE_CONST_NON_VOLATILE_P(NODE)                              \
  ((cp_type_quals (NODE) & (TYPE_QUAL_CONST | TYPE_QUAL_VOLATILE))      \
   == TYPE_QUAL_CONST)

#define FUNCTION_ARG_CHAIN(NODE) \
  TREE_CHAIN (TYPE_ARG_TYPES (TREE_TYPE (NODE)))

/* Given a FUNCTION_DECL, returns the first TREE_LIST out of TYPE_ARG_TYPES
   which refers to a user-written parameter.  */
#define FUNCTION_FIRST_USER_PARMTYPE(NODE) \
  skip_artificial_parms_for ((NODE), TYPE_ARG_TYPES (TREE_TYPE (NODE)))

/* Similarly, but for DECL_ARGUMENTS.  */
#define FUNCTION_FIRST_USER_PARM(NODE) \
  skip_artificial_parms_for ((NODE), DECL_ARGUMENTS (NODE))

/* Nonzero iff TYPE is derived from PARENT. Ignores accessibility and
   ambiguity issues.  */
#define DERIVED_FROM_P(PARENT, TYPE) \
  (lookup_base ((TYPE), (PARENT), ba_any, NULL) != NULL_TREE)
/* Nonzero iff TYPE is uniquely derived from PARENT. Ignores
   accessibility.  */
#define UNIQUELY_DERIVED_FROM_P(PARENT, TYPE) \
  (lookup_base ((TYPE), (PARENT), ba_unique | ba_quiet, NULL) != NULL_TREE)
/* Nonzero iff TYPE is publicly & uniquely derived from PARENT.  */
#define PUBLICLY_UNIQUELY_DERIVED_P(PARENT, TYPE) \
  (lookup_base ((TYPE), (PARENT), ba_ignore_scope | ba_check | ba_quiet, \
                NULL) != NULL_TREE)

/* Gives the visibility specification for a class type.  */
#define CLASSTYPE_VISIBILITY(TYPE)              \
        DECL_VISIBILITY (TYPE_MAIN_DECL (TYPE))
#define CLASSTYPE_VISIBILITY_SPECIFIED(TYPE)    \
        DECL_VISIBILITY_SPECIFIED (TYPE_MAIN_DECL (TYPE))

typedef struct GTY (()) tree_pair_s {
  tree purpose;
  tree value;
} tree_pair_s;
typedef tree_pair_s *tree_pair_p;
DEF_VEC_O (tree_pair_s);
DEF_VEC_ALLOC_O (tree_pair_s,gc);

/* This is a few header flags for 'struct lang_type'.  Actually,
   all but the first are used only for lang_type_class; they
   are put in this structure to save space.  */
struct GTY(()) lang_type_header {
  BOOL_BITFIELD is_lang_type_class : 1;

  BOOL_BITFIELD has_type_conversion : 1;
  BOOL_BITFIELD has_copy_ctor : 1;
  BOOL_BITFIELD has_default_ctor : 1;
  BOOL_BITFIELD const_needs_init : 1;
  BOOL_BITFIELD ref_needs_init : 1;
  BOOL_BITFIELD has_const_copy_assign : 1;

  BOOL_BITFIELD spare : 1;
};

/* This structure provides additional information above and beyond
   what is provide in the ordinary tree_type.  In the past, we used it
   for the types of class types, template parameters types, typename
   types, and so forth.  However, there can be many (tens to hundreds
   of thousands) of template parameter types in a compilation, and
   there's no need for this additional information in that case.
   Therefore, we now use this data structure only for class types.

   In the past, it was thought that there would be relatively few
   class types.  However, in the presence of heavy use of templates,
   many (i.e., thousands) of classes can easily be generated.
   Therefore, we should endeavor to keep the size of this structure to
   a minimum.  */
struct GTY(()) lang_type_class {
  struct lang_type_header h;

  unsigned char align;

  unsigned has_mutable : 1;
  unsigned com_interface : 1;
  unsigned non_pod_class : 1;
  unsigned nearly_empty_p : 1;
  unsigned user_align : 1;
  unsigned has_copy_assign : 1;
  unsigned has_new : 1;
  unsigned has_array_new : 1;

  unsigned gets_delete : 2;
  unsigned interface_only : 1;
  unsigned interface_unknown : 1;
  unsigned contains_empty_class_p : 1;
  unsigned anon_aggr : 1;
  unsigned non_zero_init : 1;
  unsigned empty_p : 1;

  unsigned vec_new_uses_cookie : 1;
  unsigned declared_class : 1;
  unsigned diamond_shaped : 1;
  unsigned repeated_base : 1;
  unsigned being_defined : 1;
  unsigned java_interface : 1;
  unsigned debug_requested : 1;
  unsigned fields_readonly : 1;

  unsigned use_template : 2;
  unsigned ptrmemfunc_flag : 1;
  unsigned was_anonymous : 1;
  unsigned lazy_default_ctor : 1;
  unsigned lazy_copy_ctor : 1;
  unsigned lazy_copy_assign : 1;
  unsigned lazy_destructor : 1;

  unsigned has_const_copy_ctor : 1;
  unsigned has_complex_copy_ctor : 1;
  unsigned has_complex_copy_assign : 1;
  unsigned non_aggregate : 1;
  unsigned has_complex_dflt : 1;
  unsigned has_list_ctor : 1;
  unsigned non_std_layout : 1;
  unsigned is_literal : 1;

  unsigned lazy_move_ctor : 1;
  unsigned lazy_move_assign : 1;
  unsigned has_complex_move_ctor : 1;
  unsigned has_complex_move_assign : 1;
  unsigned has_constexpr_ctor : 1;
  unsigned is_final : 1;

  /* When adding a flag here, consider whether or not it ought to
     apply to a template instance if it applies to the template.  If
     so, make sure to copy it in instantiate_class_template!  */

  /* There are some bits left to fill out a 32-bit word.  Keep track
     of this by updating the size of this bitfield whenever you add or
     remove a flag.  */
  unsigned dummy : 2;

  tree primary_base;
  VEC(tree_pair_s,gc) *vcall_indices;
  tree vtables;
  tree typeinfo_var;
  VEC(tree,gc) *vbases;
  binding_table nested_udts;
  tree as_base;
  VEC(tree,gc) *pure_virtuals;
  tree friend_classes;
  VEC(tree,gc) * GTY((reorder ("resort_type_method_vec"))) methods;
  tree key_method;
  tree decl_list;
  tree template_info;
  tree befriending_classes;
  /* In a RECORD_TYPE, information specific to Objective-C++, such
     as a list of adopted protocols or a pointer to a corresponding
     @interface.  See objc/objc-act.h for details.  */
  tree objc_info;
  /* sorted_fields is sorted based on a pointer, so we need to be able
     to resort it if pointers get rearranged.  */
  struct sorted_fields_type * GTY ((reorder ("resort_sorted_fields")))
    sorted_fields;
  /* FIXME reuse another field?  */
  tree lambda_expr;
};

struct GTY(()) lang_type_ptrmem {
  struct lang_type_header h;
  tree record;
};

struct GTY((variable_size)) lang_type {
  union lang_type_u
  {
    struct lang_type_header GTY((skip (""))) h;
    struct lang_type_class  GTY((tag ("1"))) c;
    struct lang_type_ptrmem GTY((tag ("0"))) ptrmem;
  } GTY((desc ("%h.h.is_lang_type_class"))) u;
};

#if defined ENABLE_TREE_CHECKING && (GCC_VERSION >= 2007)

#define LANG_TYPE_CLASS_CHECK(NODE) __extension__               \
({  struct lang_type *lt = TYPE_LANG_SPECIFIC (NODE);           \
    if (! lt->u.h.is_lang_type_class)                           \
      lang_check_failed (__FILE__, __LINE__, __FUNCTION__);     \
    &lt->u.c; })

#define LANG_TYPE_PTRMEM_CHECK(NODE) __extension__              \
({  struct lang_type *lt = TYPE_LANG_SPECIFIC (NODE);           \
    if (lt->u.h.is_lang_type_class)                             \
      lang_check_failed (__FILE__, __LINE__, __FUNCTION__);     \
    &lt->u.ptrmem; })

#else

#define LANG_TYPE_CLASS_CHECK(NODE) (&TYPE_LANG_SPECIFIC (NODE)->u.c)
#define LANG_TYPE_PTRMEM_CHECK(NODE) (&TYPE_LANG_SPECIFIC (NODE)->u.ptrmem)

#endif /* ENABLE_TREE_CHECKING */

/* Nonzero for _CLASSTYPE means that operator delete is defined.  */
#define TYPE_GETS_DELETE(NODE) (LANG_TYPE_CLASS_CHECK (NODE)->gets_delete)
#define TYPE_GETS_REG_DELETE(NODE) (TYPE_GETS_DELETE (NODE) & 1)

/* Nonzero if `new NODE[x]' should cause the allocation of extra
   storage to indicate how many array elements are in use.  */
#define TYPE_VEC_NEW_USES_COOKIE(NODE)                  \
  (CLASS_TYPE_P (NODE)                                  \
   && LANG_TYPE_CLASS_CHECK (NODE)->vec_new_uses_cookie)

/* Nonzero means that this _CLASSTYPE node defines ways of converting
   itself to other types.  */
#define TYPE_HAS_CONVERSION(NODE) \
  (LANG_TYPE_CLASS_CHECK (NODE)->h.has_type_conversion)

/* Nonzero means that NODE (a class type) has a default constructor --
   but that it has not yet been declared.  */
#define CLASSTYPE_LAZY_DEFAULT_CTOR(NODE) \
  (LANG_TYPE_CLASS_CHECK (NODE)->lazy_default_ctor)

/* Nonzero means that NODE (a class type) has a copy constructor --
   but that it has not yet been declared.  */
#define CLASSTYPE_LAZY_COPY_CTOR(NODE) \
  (LANG_TYPE_CLASS_CHECK (NODE)->lazy_copy_ctor)

/* Nonzero means that NODE (a class type) has a move constructor --
   but that it has not yet been declared.  */
#define CLASSTYPE_LAZY_MOVE_CTOR(NODE) \
  (LANG_TYPE_CLASS_CHECK (NODE)->lazy_move_ctor)

/* Nonzero means that NODE (a class type) has an assignment operator
   -- but that it has not yet been declared.  */
#define CLASSTYPE_LAZY_COPY_ASSIGN(NODE) \
  (LANG_TYPE_CLASS_CHECK (NODE)->lazy_copy_assign)

/* Nonzero means that NODE (a class type) has an assignment operator
   -- but that it has not yet been declared.  */
#define CLASSTYPE_LAZY_MOVE_ASSIGN(NODE) \
  (LANG_TYPE_CLASS_CHECK (NODE)->lazy_move_assign)

/* Nonzero means that NODE (a class type) has a destructor -- but that
   it has not yet been declared.  */
#define CLASSTYPE_LAZY_DESTRUCTOR(NODE) \
  (LANG_TYPE_CLASS_CHECK (NODE)->lazy_destructor)

/* Nonzero means that NODE (a class type) is final */
#define CLASSTYPE_FINAL(NODE) \
  (LANG_TYPE_CLASS_CHECK (NODE)->is_final)


/* Nonzero means that this _CLASSTYPE node overloads operator=(X&).  */
#define TYPE_HAS_COPY_ASSIGN(NODE) (LANG_TYPE_CLASS_CHECK (NODE)->has_copy_assign)

/* True iff the class type NODE has an "operator =" whose parameter
   has a parameter of type "const X&".  */
#define TYPE_HAS_CONST_COPY_ASSIGN(NODE) \
  (LANG_TYPE_CLASS_CHECK (NODE)->h.has_const_copy_assign)

/* Nonzero means that this _CLASSTYPE node has an X(X&) constructor.  */
#define TYPE_HAS_COPY_CTOR(NODE) (LANG_TYPE_CLASS_CHECK (NODE)->h.has_copy_ctor)
#define TYPE_HAS_CONST_COPY_CTOR(NODE) \
  (LANG_TYPE_CLASS_CHECK (NODE)->has_const_copy_ctor)

/* Nonzero if this class has an X(initializer_list<T>) constructor.  */
#define TYPE_HAS_LIST_CTOR(NODE) \
  (LANG_TYPE_CLASS_CHECK (NODE)->has_list_ctor)

/* Nonzero if this class has a constexpr constructor other than a copy/move
   constructor.  Note that a class can have constexpr constructors for
   static initialization even if it isn't a literal class.  */
#define TYPE_HAS_CONSTEXPR_CTOR(NODE) \
  (LANG_TYPE_CLASS_CHECK (NODE)->has_constexpr_ctor)

/* Nonzero if this class defines an overloaded operator new.  (An
   operator new [] doesn't count.)  */
#define TYPE_HAS_NEW_OPERATOR(NODE) \
  (LANG_TYPE_CLASS_CHECK (NODE)->has_new)

/* Nonzero if this class defines an overloaded operator new[].  */
#define TYPE_HAS_ARRAY_NEW_OPERATOR(NODE) \
  (LANG_TYPE_CLASS_CHECK (NODE)->has_array_new)

/* Nonzero means that this type is being defined.  I.e., the left brace
   starting the definition of this type has been seen.  */
#define TYPE_BEING_DEFINED(NODE) (LANG_TYPE_CLASS_CHECK (NODE)->being_defined)

/* Nonzero means that this type is either complete or being defined, so we
   can do lookup in it.  */
#define COMPLETE_OR_OPEN_TYPE_P(NODE) \
  (COMPLETE_TYPE_P (NODE) || (CLASS_TYPE_P (NODE) && TYPE_BEING_DEFINED (NODE)))

/* Mark bits for repeated base checks.  */
#define TYPE_MARKED_P(NODE) TREE_LANG_FLAG_6 (TYPE_CHECK (NODE))

/* Nonzero if the class NODE has multiple paths to the same (virtual)
   base object.  */
#define CLASSTYPE_DIAMOND_SHAPED_P(NODE) \
  (LANG_TYPE_CLASS_CHECK(NODE)->diamond_shaped)

/* Nonzero if the class NODE has multiple instances of the same base
   type.  */
#define CLASSTYPE_REPEATED_BASE_P(NODE) \
  (LANG_TYPE_CLASS_CHECK(NODE)->repeated_base)

/* The member function with which the vtable will be emitted:
   the first noninline non-pure-virtual member function.  NULL_TREE
   if there is no key function or if this is a class template */
#define CLASSTYPE_KEY_METHOD(NODE) (LANG_TYPE_CLASS_CHECK (NODE)->key_method)

/* Vector member functions defined in this class.  Each element is
   either a FUNCTION_DECL, a TEMPLATE_DECL, or an OVERLOAD.  All
   functions with the same name end up in the same slot.  The first
   two elements are for constructors, and destructors, respectively.
   All template conversion operators to innermost template dependent
   types are overloaded on the next slot, if they exist.  Note, the
   names for these functions will not all be the same.  The
   non-template conversion operators & templated conversions to
   non-innermost template types are next, followed by ordinary member
   functions.  There may be empty entries at the end of the vector.
   The conversion operators are unsorted. The ordinary member
   functions are sorted, once the class is complete.  */
#define CLASSTYPE_METHOD_VEC(NODE) (LANG_TYPE_CLASS_CHECK (NODE)->methods)

/* For class templates, this is a TREE_LIST of all member data,
   functions, types, and friends in the order of declaration.
   The TREE_PURPOSE of each TREE_LIST is NULL_TREE for a friend,
   and the RECORD_TYPE for the class template otherwise.  */
#define CLASSTYPE_DECL_LIST(NODE) (LANG_TYPE_CLASS_CHECK (NODE)->decl_list)

/* The slot in the CLASSTYPE_METHOD_VEC where constructors go.  */
#define CLASSTYPE_CONSTRUCTOR_SLOT 0

/* The slot in the CLASSTYPE_METHOD_VEC where destructors go.  */
#define CLASSTYPE_DESTRUCTOR_SLOT 1

/* The first slot in the CLASSTYPE_METHOD_VEC where conversion
   operators can appear.  */
#define CLASSTYPE_FIRST_CONVERSION_SLOT 2

/* A FUNCTION_DECL or OVERLOAD for the constructors for NODE.  These
   are the constructors that take an in-charge parameter.  */
#define CLASSTYPE_CONSTRUCTORS(NODE) \
  (VEC_index (tree, CLASSTYPE_METHOD_VEC (NODE), CLASSTYPE_CONSTRUCTOR_SLOT))

/* A FUNCTION_DECL for the destructor for NODE.  These are the
   destructors that take an in-charge parameter.  If
   CLASSTYPE_LAZY_DESTRUCTOR is true, then this entry will be NULL
   until the destructor is created with lazily_declare_fn.  */
#define CLASSTYPE_DESTRUCTORS(NODE) \
  (CLASSTYPE_METHOD_VEC (NODE)                                                \
   ? VEC_index (tree, CLASSTYPE_METHOD_VEC (NODE), CLASSTYPE_DESTRUCTOR_SLOT) \
   : NULL_TREE)

/* A dictionary of the nested user-defined-types (class-types, or enums)
   found within this class.  This table includes nested member class
   templates.  */
#define CLASSTYPE_NESTED_UTDS(NODE) \
   (LANG_TYPE_CLASS_CHECK (NODE)->nested_udts)

/* Nonzero if NODE has a primary base class, i.e., a base class with
   which it shares the virtual function table pointer.  */
#define CLASSTYPE_HAS_PRIMARY_BASE_P(NODE) \
  (CLASSTYPE_PRIMARY_BINFO (NODE) != NULL_TREE)

/* If non-NULL, this is the binfo for the primary base class, i.e.,
   the base class which contains the virtual function table pointer
   for this class.  */
#define CLASSTYPE_PRIMARY_BINFO(NODE) \
  (LANG_TYPE_CLASS_CHECK (NODE)->primary_base)

/* A vector of BINFOs for the direct and indirect virtual base classes
   that this type uses in a post-order depth-first left-to-right
   order.  (In other words, these bases appear in the order that they
   should be initialized.)  */
#define CLASSTYPE_VBASECLASSES(NODE) (LANG_TYPE_CLASS_CHECK (NODE)->vbases)

/* The type corresponding to NODE when NODE is used as a base class,
   i.e., NODE without virtual base classes.  */

#define CLASSTYPE_AS_BASE(NODE) (LANG_TYPE_CLASS_CHECK (NODE)->as_base)

/* True iff NODE is the CLASSTYPE_AS_BASE version of some type.  */

#define IS_FAKE_BASE_TYPE(NODE)                                 \
  (TREE_CODE (NODE) == RECORD_TYPE                              \
   && TYPE_CONTEXT (NODE) && CLASS_TYPE_P (TYPE_CONTEXT (NODE)) \
   && CLASSTYPE_AS_BASE (TYPE_CONTEXT (NODE)) == (NODE))

/* These are the size and alignment of the type without its virtual
   base classes, for when we use this type as a base itself.  */
#define CLASSTYPE_SIZE(NODE) TYPE_SIZE (CLASSTYPE_AS_BASE (NODE))
#define CLASSTYPE_SIZE_UNIT(NODE) TYPE_SIZE_UNIT (CLASSTYPE_AS_BASE (NODE))
#define CLASSTYPE_ALIGN(NODE) TYPE_ALIGN (CLASSTYPE_AS_BASE (NODE))
#define CLASSTYPE_USER_ALIGN(NODE) TYPE_USER_ALIGN (CLASSTYPE_AS_BASE (NODE))

/* The alignment of NODE, without its virtual bases, in bytes.  */
#define CLASSTYPE_ALIGN_UNIT(NODE) \
  (CLASSTYPE_ALIGN (NODE) / BITS_PER_UNIT)

/* True if this a Java interface type, declared with
   '__attribute__ ((java_interface))'.  */
#define TYPE_JAVA_INTERFACE(NODE) \
  (LANG_TYPE_CLASS_CHECK (NODE)->java_interface)

/* A VEC(tree) of virtual functions which cannot be inherited by
   derived classes.  When deriving from this type, the derived
   class must provide its own definition for each of these functions.  */
#define CLASSTYPE_PURE_VIRTUALS(NODE) \
  (LANG_TYPE_CLASS_CHECK (NODE)->pure_virtuals)

/* Nonzero means that this type has an X() constructor.  */
#define TYPE_HAS_DEFAULT_CONSTRUCTOR(NODE) \
  (LANG_TYPE_CLASS_CHECK (NODE)->h.has_default_ctor)

/* Nonzero means that this type contains a mutable member.  */
#define CLASSTYPE_HAS_MUTABLE(NODE) (LANG_TYPE_CLASS_CHECK (NODE)->has_mutable)
#define TYPE_HAS_MUTABLE_P(NODE) (cp_has_mutable_p (NODE))

/* Nonzero means that this class type is not POD for the purpose of layout
   (as defined in the ABI).  This is different from the language's POD.  */
#define CLASSTYPE_NON_LAYOUT_POD_P(NODE) \
  (LANG_TYPE_CLASS_CHECK (NODE)->non_pod_class)

/* Nonzero means that this class type is a non-standard-layout class.  */
#define CLASSTYPE_NON_STD_LAYOUT(NODE) \
  (LANG_TYPE_CLASS_CHECK (NODE)->non_std_layout)

/* Nonzero means that this class contains pod types whose default
   initialization is not a zero initialization (namely, pointers to
   data members).  */
#define CLASSTYPE_NON_ZERO_INIT_P(NODE) \
  (LANG_TYPE_CLASS_CHECK (NODE)->non_zero_init)

/* Nonzero if this class is "empty" in the sense of the C++ ABI.  */
#define CLASSTYPE_EMPTY_P(NODE) \
  (LANG_TYPE_CLASS_CHECK (NODE)->empty_p)

/* Nonzero if this class is "nearly empty", i.e., contains only a
   virtual function table pointer.  */
#define CLASSTYPE_NEARLY_EMPTY_P(NODE) \
  (LANG_TYPE_CLASS_CHECK (NODE)->nearly_empty_p)

/* Nonzero if this class contains an empty subobject.  */
#define CLASSTYPE_CONTAINS_EMPTY_CLASS_P(NODE) \
  (LANG_TYPE_CLASS_CHECK (NODE)->contains_empty_class_p)

/* A list of class types of which this type is a friend.  The
   TREE_VALUE is normally a TYPE, but will be a TEMPLATE_DECL in the
   case of a template friend.  */
#define CLASSTYPE_FRIEND_CLASSES(NODE) \
  (LANG_TYPE_CLASS_CHECK (NODE)->friend_classes)

/* A list of the classes which grant friendship to this class.  */
#define CLASSTYPE_BEFRIENDING_CLASSES(NODE) \
  (LANG_TYPE_CLASS_CHECK (NODE)->befriending_classes)

/* The associated LAMBDA_EXPR that made this class.  */
#define CLASSTYPE_LAMBDA_EXPR(NODE) \
  (LANG_TYPE_CLASS_CHECK (NODE)->lambda_expr)
/* The extra mangling scope for this closure type.  */
#define LAMBDA_TYPE_EXTRA_SCOPE(NODE) \
  (LAMBDA_EXPR_EXTRA_SCOPE (CLASSTYPE_LAMBDA_EXPR (NODE)))

/* Say whether this node was declared as a "class" or a "struct".  */
#define CLASSTYPE_DECLARED_CLASS(NODE) \
  (LANG_TYPE_CLASS_CHECK (NODE)->declared_class)

/* Nonzero if this class has const members
   which have no specified initialization.  */
#define CLASSTYPE_READONLY_FIELDS_NEED_INIT(NODE)       \
  (TYPE_LANG_SPECIFIC (NODE)                            \
   ? LANG_TYPE_CLASS_CHECK (NODE)->h.const_needs_init : 0)
#define SET_CLASSTYPE_READONLY_FIELDS_NEED_INIT(NODE, VALUE) \
  (LANG_TYPE_CLASS_CHECK (NODE)->h.const_needs_init = (VALUE))

/* Nonzero if this class has ref members
   which have no specified initialization.  */
#define CLASSTYPE_REF_FIELDS_NEED_INIT(NODE)            \
  (TYPE_LANG_SPECIFIC (NODE)                            \
   ? LANG_TYPE_CLASS_CHECK (NODE)->h.ref_needs_init : 0)
#define SET_CLASSTYPE_REF_FIELDS_NEED_INIT(NODE, VALUE) \
  (LANG_TYPE_CLASS_CHECK (NODE)->h.ref_needs_init = (VALUE))

/* Nonzero if this class is included from a header file which employs
   `#pragma interface', and it is not included in its implementation file.  */
#define CLASSTYPE_INTERFACE_ONLY(NODE) \
  (LANG_TYPE_CLASS_CHECK (NODE)->interface_only)

/* True if we have already determined whether or not vtables, VTTs,
   typeinfo, and other similar per-class data should be emitted in
   this translation unit.  This flag does not indicate whether or not
   these items should be emitted; it only indicates that we know one
   way or the other.  */
#define CLASSTYPE_INTERFACE_KNOWN(NODE) \
  (LANG_TYPE_CLASS_CHECK (NODE)->interface_unknown == 0)
/* The opposite of CLASSTYPE_INTERFACE_KNOWN.  */
#define CLASSTYPE_INTERFACE_UNKNOWN(NODE) \
  (LANG_TYPE_CLASS_CHECK (NODE)->interface_unknown)

#define SET_CLASSTYPE_INTERFACE_UNKNOWN_X(NODE,X) \
  (LANG_TYPE_CLASS_CHECK (NODE)->interface_unknown = !!(X))
#define SET_CLASSTYPE_INTERFACE_UNKNOWN(NODE) \
  (LANG_TYPE_CLASS_CHECK (NODE)->interface_unknown = 1)
#define SET_CLASSTYPE_INTERFACE_KNOWN(NODE) \
  (LANG_TYPE_CLASS_CHECK (NODE)->interface_unknown = 0)

/* Nonzero if a _DECL node requires us to output debug info for this class.  */
#define CLASSTYPE_DEBUG_REQUESTED(NODE) \
  (LANG_TYPE_CLASS_CHECK (NODE)->debug_requested)
\f
/* Additional macros for inheritance information.  */

/* Nonzero means that this class is on a path leading to a new vtable.  */
#define BINFO_VTABLE_PATH_MARKED(NODE) BINFO_FLAG_1 (NODE)

/* Nonzero means B (a BINFO) has its own vtable.  Any copies will not
   have this flag set.  */
#define BINFO_NEW_VTABLE_MARKED(B) (BINFO_FLAG_2 (B))

/* Compare a BINFO_TYPE with another type for equality.  For a binfo,
   this is functionally equivalent to using same_type_p, but
   measurably faster.  At least one of the arguments must be a
   BINFO_TYPE.  The other can be a BINFO_TYPE or a regular type.  If
   BINFO_TYPE(T) ever stops being the main variant of the class the
   binfo is for, this macro must change.  */
#define SAME_BINFO_TYPE_P(A, B) ((A) == (B))

/* Any subobject that needs a new vtable must have a vptr and must not
   be a non-virtual primary base (since it would then use the vtable from a
   derived class and never become non-primary.)  */
#define SET_BINFO_NEW_VTABLE_MARKED(B)                                   \
  (BINFO_NEW_VTABLE_MARKED (B) = 1,                                      \
   gcc_assert (!BINFO_PRIMARY_P (B) || BINFO_VIRTUAL_P (B)),             \
   gcc_assert (TYPE_VFIELD (BINFO_TYPE (B))))

/* Nonzero if this binfo is for a dependent base - one that should not
   be searched.  */
#define BINFO_DEPENDENT_BASE_P(NODE) BINFO_FLAG_3 (NODE)

/* Nonzero if this binfo has lost its primary base binfo (because that
   is a nearly-empty virtual base that has been taken by some other
   base in the complete hierarchy.  */
#define BINFO_LOST_PRIMARY_P(NODE) BINFO_FLAG_4 (NODE)

/* Nonzero if this BINFO is a primary base class.  */
#define BINFO_PRIMARY_P(NODE) BINFO_FLAG_5(NODE)

/* Used by various search routines.  */
#define IDENTIFIER_MARKED(NODE) TREE_LANG_FLAG_0 (NODE)
\f
/* A VEC(tree_pair_s) of the vcall indices associated with the class
   NODE.  The PURPOSE of each element is a FUNCTION_DECL for a virtual
   function.  The VALUE is the index into the virtual table where the
   vcall offset for that function is stored, when NODE is a virtual
   base.  */
#define CLASSTYPE_VCALL_INDICES(NODE) \
  (LANG_TYPE_CLASS_CHECK (NODE)->vcall_indices)

/* The various vtables for the class NODE.  The primary vtable will be
   first, followed by the construction vtables and VTT, if any.  */
#define CLASSTYPE_VTABLES(NODE) \
  (LANG_TYPE_CLASS_CHECK (NODE)->vtables)

/* The std::type_info variable representing this class, or NULL if no
   such variable has been created.  This field is only set for the
   TYPE_MAIN_VARIANT of the class.  */
#define CLASSTYPE_TYPEINFO_VAR(NODE) \
  (LANG_TYPE_CLASS_CHECK (NODE)->typeinfo_var)

/* Accessor macros for the BINFO_VIRTUALS list.  */

/* The number of bytes by which to adjust the `this' pointer when
   calling this virtual function.  Subtract this value from the this
   pointer. Always non-NULL, might be constant zero though.  */
#define BV_DELTA(NODE) (TREE_PURPOSE (NODE))

/* If non-NULL, the vtable index at which to find the vcall offset
   when calling this virtual function.  Add the value at that vtable
   index to the this pointer.  */
#define BV_VCALL_INDEX(NODE) (TREE_TYPE (NODE))

/* The function to call.  */
#define BV_FN(NODE) (TREE_VALUE (NODE))

/* Whether or not this entry is for a lost primary virtual base.  */
#define BV_LOST_PRIMARY(NODE) (TREE_LANG_FLAG_0 (NODE))
\f
/* For FUNCTION_TYPE or METHOD_TYPE, a list of the exceptions that
   this type can raise.  Each TREE_VALUE is a _TYPE.  The TREE_VALUE
   will be NULL_TREE to indicate a throw specification of `()', or
   no exceptions allowed.  For a noexcept specification, TREE_VALUE
   is NULL_TREE and TREE_PURPOSE is the constant-expression.  For
   a deferred noexcept-specification, TREE_PURPOSE is a DEFERRED_NOEXCEPT
   (for templates) or an OVERLOAD list of functions (for implicitly
   declared functions).  */
#define TYPE_RAISES_EXCEPTIONS(NODE) TYPE_LANG_SLOT_1 (NODE)

/* For FUNCTION_TYPE or METHOD_TYPE, return 1 iff it is declared `throw()'
   or noexcept(true).  */
#define TYPE_NOTHROW_P(NODE) nothrow_spec_p (TYPE_RAISES_EXCEPTIONS (NODE))

/* For FUNCTION_TYPE or METHOD_TYPE, true if NODE is noexcept.  This is the
   case for things declared noexcept(true) and, with -fnothrow-opt, for
   throw() functions.  */
#define TYPE_NOEXCEPT_P(NODE) type_noexcept_p (NODE)

/* The binding level associated with the namespace.  */
#define NAMESPACE_LEVEL(NODE) \
  (LANG_DECL_NS_CHECK (NODE)->level)
\f
/* Flags shared by all forms of DECL_LANG_SPECIFIC.

   Some of the flags live here only to make lang_decl_min/fn smaller.  Do
   not make this struct larger than 32 bits; instead, make sel smaller.  */

struct GTY(()) lang_decl_base {
  unsigned selector : 16;   /* Larger than necessary for faster access.  */
  ENUM_BITFIELD(languages) language : 4;
  unsigned use_template : 2;
  unsigned not_really_extern : 1;          /* var or fn */
  unsigned initialized_in_class : 1;       /* var or fn */
  unsigned repo_available_p : 1;           /* var or fn */
  unsigned threadprivate_or_deleted_p : 1; /* var or fn */
  unsigned anticipated_p : 1;              /* fn or type */
  unsigned friend_attr : 1;                /* fn or type */
  unsigned template_conv_p : 1;            /* var or template */
  unsigned odr_used : 1;                   /* var or fn */
  unsigned u2sel : 1;
  /* 1 spare bit */
};

/* True for DECL codes which have template info and access.  */
#define LANG_DECL_HAS_MIN(NODE)                 \
  (TREE_CODE (NODE) == FUNCTION_DECL            \
   || TREE_CODE (NODE) == FIELD_DECL            \
   || TREE_CODE (NODE) == VAR_DECL              \
   || TREE_CODE (NODE) == CONST_DECL            \
   || TREE_CODE (NODE) == TYPE_DECL             \
   || TREE_CODE (NODE) == TEMPLATE_DECL         \
   || TREE_CODE (NODE) == USING_DECL)

/* DECL_LANG_SPECIFIC for the above codes.  */

struct GTY(()) lang_decl_min {
  struct lang_decl_base base;

  /* In a FUNCTION_DECL for which DECL_THUNK_P holds, this is
     THUNK_ALIAS.
     In a FUNCTION_DECL for which DECL_THUNK_P does not hold,
     VAR_DECL, TYPE_DECL, or TEMPLATE_DECL, this is
     DECL_TEMPLATE_INFO.  */
  tree template_info;

  union lang_decl_u2 {
    /* In a FUNCTION_DECL for which DECL_THUNK_P holds, this is
       THUNK_VIRTUAL_OFFSET.
       Otherwise this is DECL_ACCESS.  */
    tree GTY ((tag ("0"))) access;

    /* For VAR_DECL in function, this is DECL_DISCRIMINATOR.  */
    int GTY ((tag ("1"))) discriminator;
  } GTY ((desc ("%0.u.base.u2sel"))) u2;
};

/* Additional DECL_LANG_SPECIFIC information for functions.  */

struct GTY(()) lang_decl_fn {
  struct lang_decl_min min;

  /* In an overloaded operator, this is the value of
     DECL_OVERLOADED_OPERATOR_P.  */
  ENUM_BITFIELD (tree_code) operator_code : 16;

  unsigned global_ctor_p : 1;
  unsigned global_dtor_p : 1;
  unsigned constructor_attr : 1;
  unsigned destructor_attr : 1;
  unsigned assignment_operator_p : 1;
  unsigned static_function : 1;
  unsigned pure_virtual : 1;
  unsigned defaulted_p : 1;

  unsigned has_in_charge_parm_p : 1;
  unsigned has_vtt_parm_p : 1;
  unsigned pending_inline_p : 1;
  unsigned nonconverting : 1;
  unsigned thunk_p : 1;
  unsigned this_thunk_p : 1;
  unsigned hidden_friend_p : 1;
  /* 1 spare bit.  */

  /* For a non-thunk function decl, this is a tree list of
     friendly classes. For a thunk function decl, it is the
     thunked to function decl.  */
  tree befriending_classes;

  /* For a non-virtual FUNCTION_DECL, this is
     DECL_FRIEND_CONTEXT.  For a virtual FUNCTION_DECL for which
     DECL_THIS_THUNK_P does not hold, this is DECL_THUNKS. Both
     this pointer and result pointer adjusting thunks are
     chained here.  This pointer thunks to return pointer thunks
     will be chained on the return pointer thunk.  */
  tree context;

  union lang_decl_u5
  {
    /* In a non-thunk FUNCTION_DECL or TEMPLATE_DECL, this is
       DECL_CLONED_FUNCTION.  */
    tree GTY ((tag ("0"))) cloned_function;

    /* In a FUNCTION_DECL for which THUNK_P holds this is the
       THUNK_FIXED_OFFSET.  */
    HOST_WIDE_INT GTY ((tag ("1"))) fixed_offset;
  } GTY ((desc ("%1.thunk_p"))) u5;

  union lang_decl_u3
  {
    struct cp_token_cache * GTY ((tag ("1"))) pending_inline_info;
    struct language_function * GTY ((tag ("0")))
      saved_language_function;
  } GTY ((desc ("%1.pending_inline_p"))) u;

};

/* DECL_LANG_SPECIFIC for namespaces.  */

struct GTY(()) lang_decl_ns {
  struct lang_decl_base base;
  cp_binding_level *level;
};

/* DECL_LANG_SPECIFIC for parameters.  */

struct GTY(()) lang_decl_parm {
  struct lang_decl_base base;
  int level;
  int index;
};

/* DECL_LANG_SPECIFIC for all types.  It would be nice to just make this a
   union rather than a struct containing a union as its only field, but
   tree.h declares it as a struct.  */

struct GTY((variable_size)) lang_decl {
  union GTY((desc ("%h.base.selector"))) lang_decl_u {
    struct lang_decl_base GTY ((default)) base;
    struct lang_decl_min GTY((tag ("0"))) min;
    struct lang_decl_fn GTY ((tag ("1"))) fn;
    struct lang_decl_ns GTY((tag ("2"))) ns;
    struct lang_decl_parm GTY((tag ("3"))) parm;
  } u;
};

/* Looks through a template (if present) to find what it declares.  */
#define STRIP_TEMPLATE(NODE) \
  (TREE_CODE (NODE) == TEMPLATE_DECL ? DECL_TEMPLATE_RESULT (NODE) : NODE)

#if defined ENABLE_TREE_CHECKING && (GCC_VERSION >= 2007)

#define LANG_DECL_MIN_CHECK(NODE) __extension__                 \
({ struct lang_decl *lt = DECL_LANG_SPECIFIC (NODE);            \
   if (!LANG_DECL_HAS_MIN (NODE))                               \
     lang_check_failed (__FILE__, __LINE__, __FUNCTION__);      \
   &lt->u.min; })

/* We want to be able to check DECL_CONSTRUCTOR_P and such on a function
   template, not just on a FUNCTION_DECL.  So when looking for things in
   lang_decl_fn, look down through a TEMPLATE_DECL into its result.  */
#define LANG_DECL_FN_CHECK(NODE) __extension__                          \
({ struct lang_decl *lt = DECL_LANG_SPECIFIC (STRIP_TEMPLATE (NODE));   \
   if (!DECL_DECLARES_FUNCTION_P (NODE) || lt->u.base.selector != 1)    \
     lang_check_failed (__FILE__, __LINE__, __FUNCTION__);              \
   &lt->u.fn; })

#define LANG_DECL_NS_CHECK(NODE) __extension__                          \
({ struct lang_decl *lt = DECL_LANG_SPECIFIC (NODE);                    \
   if (TREE_CODE (NODE) != NAMESPACE_DECL || lt->u.base.selector != 2)  \
     lang_check_failed (__FILE__, __LINE__, __FUNCTION__);              \
   &lt->u.ns; })

#define LANG_DECL_PARM_CHECK(NODE) __extension__                \
({ struct lang_decl *lt = DECL_LANG_SPECIFIC (NODE);            \
  if (TREE_CODE (NODE) != PARM_DECL)                            \
    lang_check_failed (__FILE__, __LINE__, __FUNCTION__);       \
  &lt->u.parm; })

#define LANG_DECL_U2_CHECK(NODE, TF) __extension__              \
({  struct lang_decl *lt = DECL_LANG_SPECIFIC (NODE);           \
    if (!LANG_DECL_HAS_MIN (NODE) || lt->u.base.u2sel != TF)    \
      lang_check_failed (__FILE__, __LINE__, __FUNCTION__);     \
    &lt->u.min.u2; })

#else

#define LANG_DECL_MIN_CHECK(NODE) \
  (&DECL_LANG_SPECIFIC (NODE)->u.min)

#define LANG_DECL_FN_CHECK(NODE) \
  (&DECL_LANG_SPECIFIC (STRIP_TEMPLATE (NODE))->u.fn)

#define LANG_DECL_NS_CHECK(NODE) \
  (&DECL_LANG_SPECIFIC (NODE)->u.ns)

#define LANG_DECL_PARM_CHECK(NODE) \
  (&DECL_LANG_SPECIFIC (NODE)->u.parm)

#define LANG_DECL_U2_CHECK(NODE, TF) \
  (&DECL_LANG_SPECIFIC (NODE)->u.min.u2)

#endif /* ENABLE_TREE_CHECKING */

/* For a FUNCTION_DECL or a VAR_DECL, the language linkage for the
   declaration.  Some entities (like a member function in a local
   class, or a local variable) do not have linkage at all, and this
   macro should not be used in those cases.

   Implementation note: A FUNCTION_DECL without DECL_LANG_SPECIFIC was
   created by language-independent code, and has C linkage.  Most
   VAR_DECLs have C++ linkage, and do not have DECL_LANG_SPECIFIC, but
   we do create DECL_LANG_SPECIFIC for variables with non-C++ linkage.  */
#define DECL_LANGUAGE(NODE)                             \
  (DECL_LANG_SPECIFIC (NODE)                            \
   ? DECL_LANG_SPECIFIC (NODE)->u.base.language         \
   : (TREE_CODE (NODE) == FUNCTION_DECL                 \
      ? lang_c : lang_cplusplus))

/* Set the language linkage for NODE to LANGUAGE.  */
#define SET_DECL_LANGUAGE(NODE, LANGUAGE) \
  (DECL_LANG_SPECIFIC (NODE)->u.base.language = (LANGUAGE))

/* For FUNCTION_DECLs: nonzero means that this function is a constructor.  */
#define DECL_CONSTRUCTOR_P(NODE) \
  (LANG_DECL_FN_CHECK (NODE)->constructor_attr)

/* Nonzero if NODE (a FUNCTION_DECL) is a constructor for a complete
   object.  */
#define DECL_COMPLETE_CONSTRUCTOR_P(NODE)               \
  (DECL_CONSTRUCTOR_P (NODE)                            \
   && DECL_NAME (NODE) == complete_ctor_identifier)

/* Nonzero if NODE (a FUNCTION_DECL) is a constructor for a base
   object.  */
#define DECL_BASE_CONSTRUCTOR_P(NODE)           \
  (DECL_CONSTRUCTOR_P (NODE)                    \
   && DECL_NAME (NODE) == base_ctor_identifier)

/* Nonzero if NODE (a FUNCTION_DECL) is a constructor, but not either the
   specialized in-charge constructor or the specialized not-in-charge
   constructor.  */
#define DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P(NODE)                \
  (DECL_DECLARES_FUNCTION_P (NODE) && DECL_CONSTRUCTOR_P (NODE) \
   && !DECL_CLONED_FUNCTION_P (NODE))

/* Nonzero if NODE (a FUNCTION_DECL) is a copy constructor.  */
#define DECL_COPY_CONSTRUCTOR_P(NODE) \
  (DECL_CONSTRUCTOR_P (NODE) && copy_fn_p (NODE) > 0)

/* Nonzero if NODE (a FUNCTION_DECL) is a move constructor.  */
#define DECL_MOVE_CONSTRUCTOR_P(NODE) \
  (DECL_CONSTRUCTOR_P (NODE) && move_fn_p (NODE))

/* Nonzero if NODE is a destructor.  */
#define DECL_DESTRUCTOR_P(NODE)                         \
  (LANG_DECL_FN_CHECK (NODE)->destructor_attr)

/* Nonzero if NODE (a FUNCTION_DECL) is a destructor, but not the
   specialized in-charge constructor, in-charge deleting constructor,
   or the base destructor.  */
#define DECL_MAYBE_IN_CHARGE_DESTRUCTOR_P(NODE)                 \
  (DECL_DECLARES_FUNCTION_P (NODE) && DECL_DESTRUCTOR_P (NODE)  \
   && !DECL_CLONED_FUNCTION_P (NODE))

/* Nonzero if NODE (a FUNCTION_DECL) is a destructor for a complete
   object.  */
#define DECL_COMPLETE_DESTRUCTOR_P(NODE)                \
  (DECL_DESTRUCTOR_P (NODE)                             \
   && DECL_NAME (NODE) == complete_dtor_identifier)

/* Nonzero if NODE (a FUNCTION_DECL) is a destructor for a base
   object.  */
#define DECL_BASE_DESTRUCTOR_P(NODE)            \
  (DECL_DESTRUCTOR_P (NODE)                     \
   && DECL_NAME (NODE) == base_dtor_identifier)

/* Nonzero if NODE (a FUNCTION_DECL) is a destructor for a complete
   object that deletes the object after it has been destroyed.  */
#define DECL_DELETING_DESTRUCTOR_P(NODE)                \
  (DECL_DESTRUCTOR_P (NODE)                             \
   && DECL_NAME (NODE) == deleting_dtor_identifier)

/* Nonzero if NODE (a FUNCTION_DECL) is a cloned constructor or
   destructor.  */
#define DECL_CLONED_FUNCTION_P(NODE) (!!decl_cloned_function_p (NODE, true))

/* If DECL_CLONED_FUNCTION_P holds, this is the function that was
   cloned.  */
#define DECL_CLONED_FUNCTION(NODE) (*decl_cloned_function_p (NODE, false))

/* Perform an action for each clone of FN, if FN is a function with
   clones.  This macro should be used like:

      FOR_EACH_CLONE (clone, fn)
        { ... }

  */
#define FOR_EACH_CLONE(CLONE, FN)                       \
  if (TREE_CODE (FN) == FUNCTION_DECL                   \
      && (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (FN)       \
          || DECL_MAYBE_IN_CHARGE_DESTRUCTOR_P (FN)))   \
     for (CLONE = DECL_CHAIN (FN);                      \
          CLONE && DECL_CLONED_FUNCTION_P (CLONE);      \
          CLONE = DECL_CHAIN (CLONE))

/* Nonzero if NODE has DECL_DISCRIMINATOR and not DECL_ACCESS.  */
#define DECL_DISCRIMINATOR_P(NODE)      \
  (TREE_CODE (NODE) == VAR_DECL         \
   && DECL_FUNCTION_SCOPE_P (NODE))

/* Discriminator for name mangling.  */
#define DECL_DISCRIMINATOR(NODE) (LANG_DECL_U2_CHECK (NODE, 1)->discriminator)

/* True iff DECL_DISCRIMINATOR is set for a DECL_DISCRIMINATOR_P decl.  */
#define DECL_DISCRIMINATOR_SET_P(NODE) \
  (DECL_LANG_SPECIFIC (NODE) && DECL_LANG_SPECIFIC (NODE)->u.base.u2sel == 1)

/* The index of a user-declared parameter in its function, starting at 1.
   All artificial parameters will have index 0.  */
#define DECL_PARM_INDEX(NODE) \
  (LANG_DECL_PARM_CHECK (NODE)->index)

/* The level of a user-declared parameter in its function, starting at 1.
   A parameter of the function will have level 1; a parameter of the first
   nested function declarator (i.e. t in void f (void (*p)(T t))) will have
   level 2.  */
#define DECL_PARM_LEVEL(NODE) \
  (LANG_DECL_PARM_CHECK (NODE)->level)

/* Nonzero if the VTT parm has been added to NODE.  */
#define DECL_HAS_VTT_PARM_P(NODE) \
  (LANG_DECL_FN_CHECK (NODE)->has_vtt_parm_p)

/* Nonzero if NODE is a FUNCTION_DECL for which a VTT parameter is
   required.  */
#define DECL_NEEDS_VTT_PARM_P(NODE)                     \
  (CLASSTYPE_VBASECLASSES (DECL_CONTEXT (NODE))         \
   && (DECL_BASE_CONSTRUCTOR_P (NODE)                   \
       || DECL_BASE_DESTRUCTOR_P (NODE)))

/* Nonzero if NODE is a user-defined conversion operator.  */
#define DECL_CONV_FN_P(NODE) \
  (DECL_NAME (NODE) && IDENTIFIER_TYPENAME_P (DECL_NAME (NODE)))

/* If FN is a conversion operator, the type to which it converts.
   Otherwise, NULL_TREE.  */
#define DECL_CONV_FN_TYPE(FN) \
  (DECL_CONV_FN_P (FN) ? TREE_TYPE (DECL_NAME (FN)) : NULL_TREE)

/* Nonzero if NODE, which is a TEMPLATE_DECL, is a template
   conversion operator to a type dependent on the innermost template
   args.  */
#define DECL_TEMPLATE_CONV_FN_P(NODE) \
  (DECL_LANG_SPECIFIC (TEMPLATE_DECL_CHECK (NODE))->u.base.template_conv_p)

/* Nonzero if NODE, a static data member, was declared in its class as an
   array of unknown bound.  */
#define VAR_HAD_UNKNOWN_BOUND(NODE)                     \
  (DECL_LANG_SPECIFIC (VAR_DECL_CHECK (NODE))           \
   ? DECL_LANG_SPECIFIC (NODE)->u.base.template_conv_p  \
   : false)
#define SET_VAR_HAD_UNKNOWN_BOUND(NODE) \
  (DECL_LANG_SPECIFIC (VAR_DECL_CHECK (NODE))->u.base.template_conv_p = true)

/* Set the overloaded operator code for NODE to CODE.  */
#define SET_OVERLOADED_OPERATOR_CODE(NODE, CODE) \
  (LANG_DECL_FN_CHECK (NODE)->operator_code = (CODE))

/* If NODE is an overloaded operator, then this returns the TREE_CODE
   associated with the overloaded operator.
   DECL_ASSIGNMENT_OPERATOR_P must also be checked to determine
   whether or not NODE is an assignment operator.  If NODE is not an
   overloaded operator, ERROR_MARK is returned.  Since the numerical
   value of ERROR_MARK is zero, this macro can be used as a predicate
   to test whether or not NODE is an overloaded operator.  */
#define DECL_OVERLOADED_OPERATOR_P(NODE)                \
  (IDENTIFIER_OPNAME_P (DECL_NAME (NODE))               \
   ? LANG_DECL_FN_CHECK (NODE)->operator_code : ERROR_MARK)

/* Nonzero if NODE is an assignment operator (including += and such).  */
#define DECL_ASSIGNMENT_OPERATOR_P(NODE) \
  (LANG_DECL_FN_CHECK (NODE)->assignment_operator_p)

/* For FUNCTION_DECLs: nonzero means that this function is a
   constructor or a destructor with an extra in-charge parameter to
   control whether or not virtual bases are constructed.  */
#define DECL_HAS_IN_CHARGE_PARM_P(NODE) \
  (LANG_DECL_FN_CHECK (NODE)->has_in_charge_parm_p)

/* Nonzero if DECL is a declaration of __builtin_constant_p.  */
#define DECL_IS_BUILTIN_CONSTANT_P(NODE)                \
 (TREE_CODE (NODE) == FUNCTION_DECL                     \
  && DECL_BUILT_IN_CLASS (NODE) == BUILT_IN_NORMAL      \
  && DECL_FUNCTION_CODE (NODE) == BUILT_IN_CONSTANT_P)

/* Nonzero for _DECL means that this decl appears in (or will appear
   in) as a member in a RECORD_TYPE or UNION_TYPE node.  It is also for
   detecting circularity in case members are multiply defined.  In the
   case of a VAR_DECL, it is also used to determine how program storage
   should be allocated.  */
#define DECL_IN_AGGR_P(NODE) (DECL_LANG_FLAG_3 (NODE))

/* Nonzero for a VAR_DECL means that the variable's initialization (if
   any) has been processed.  (In general, DECL_INITIALIZED_P is
   !DECL_EXTERN, but static data members may be initialized even if
   not defined.)  */
#define DECL_INITIALIZED_P(NODE) \
   (TREE_LANG_FLAG_1 (VAR_DECL_CHECK (NODE)))

/* Nonzero for a VAR_DECL iff an explicit initializer was provided.  */
#define DECL_NONTRIVIALLY_INITIALIZED_P(NODE)   \
   (TREE_LANG_FLAG_3 (VAR_DECL_CHECK (NODE)))

/* Nonzero for a VAR_DECL that was initialized with a
   constant-expression.  */
#define DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P(NODE) \
  (TREE_LANG_FLAG_2 (VAR_DECL_CHECK (NODE)))

/* Nonzero if the DECL was initialized in the class definition itself,
   rather than outside the class.  This is used for both static member
   VAR_DECLS, and FUNCTION_DECLS that are defined in the class.  */
#define DECL_INITIALIZED_IN_CLASS_P(DECL) \
  (DECL_LANG_SPECIFIC (VAR_OR_FUNCTION_DECL_CHECK (DECL)) \
   ->u.base.initialized_in_class)

/* Nonzero if the DECL is used in the sense of 3.2 [basic.def.odr].
   Only available for decls with DECL_LANG_SPECIFIC.  */
#define DECL_ODR_USED(DECL) \
  (DECL_LANG_SPECIFIC (VAR_OR_FUNCTION_DECL_CHECK (DECL)) \
   ->u.base.odr_used)

/* Nonzero for DECL means that this decl is just a friend declaration,
   and should not be added to the list of members for this class.  */
#define DECL_FRIEND_P(NODE) (DECL_LANG_SPECIFIC (NODE)->u.base.friend_attr)

/* A TREE_LIST of the types which have befriended this FUNCTION_DECL.  */
#define DECL_BEFRIENDING_CLASSES(NODE) \
  (LANG_DECL_FN_CHECK (NODE)->befriending_classes)

/* Nonzero for FUNCTION_DECL means that this decl is a static
   member function.  */
#define DECL_STATIC_FUNCTION_P(NODE) \
  (LANG_DECL_FN_CHECK (NODE)->static_function)

/* Nonzero for FUNCTION_DECL means that this decl is a non-static
   member function.  */
#define DECL_NONSTATIC_MEMBER_FUNCTION_P(NODE) \
  (TREE_CODE (TREE_TYPE (NODE)) == METHOD_TYPE)

/* Nonzero for FUNCTION_DECL means that this decl is a member function
   (static or non-static).  */
#define DECL_FUNCTION_MEMBER_P(NODE) \
  (DECL_NONSTATIC_MEMBER_FUNCTION_P (NODE) || DECL_STATIC_FUNCTION_P (NODE))

/* Nonzero for FUNCTION_DECL means that this member function
   has `this' as const X *const.  */
#define DECL_CONST_MEMFUNC_P(NODE)                                       \
  (DECL_NONSTATIC_MEMBER_FUNCTION_P (NODE)                               \
   && CP_TYPE_CONST_P (TREE_TYPE (TREE_VALUE                             \
                                  (TYPE_ARG_TYPES (TREE_TYPE (NODE))))))

/* Nonzero for FUNCTION_DECL means that this member function
   has `this' as volatile X *const.  */
#define DECL_VOLATILE_MEMFUNC_P(NODE)                                    \
  (DECL_NONSTATIC_MEMBER_FUNCTION_P (NODE)                               \
   && CP_TYPE_VOLATILE_P (TREE_TYPE (TREE_VALUE                          \
                                  (TYPE_ARG_TYPES (TREE_TYPE (NODE))))))

/* Nonzero for a DECL means that this member is a non-static member.  */
#define DECL_NONSTATIC_MEMBER_P(NODE)           \
  (DECL_NONSTATIC_MEMBER_FUNCTION_P (NODE)      \
   || TREE_CODE (NODE) == FIELD_DECL)

/* Nonzero for _DECL means that this member object type
   is mutable.  */
#define DECL_MUTABLE_P(NODE) (DECL_LANG_FLAG_0 (NODE))

/* Nonzero for _DECL means that this constructor or conversion function is
   non-converting.  */
#define DECL_NONCONVERTING_P(NODE) \
  (LANG_DECL_FN_CHECK (NODE)->nonconverting)

/* Nonzero for FUNCTION_DECL means that this member function is a pure
   virtual function.  */
#define DECL_PURE_VIRTUAL_P(NODE) \
  (LANG_DECL_FN_CHECK (NODE)->pure_virtual)

/* True (in a FUNCTION_DECL) if NODE is a virtual function that is an
   invalid overrider for a function from a base class.  Once we have
   complained about an invalid overrider we avoid complaining about it
   again.  */
#define DECL_INVALID_OVERRIDER_P(NODE) \
  (DECL_LANG_FLAG_4 (NODE))

/* True (in a FUNCTION_DECL) if NODE is a function declared with
   an override virt-specifier */
#define DECL_OVERRIDE_P(NODE) (TREE_LANG_FLAG_0 (NODE))

/* True (in a FUNCTION_DECL) if NODE is a function declared with
   a final virt-specifier */
#define DECL_FINAL_P(NODE) (TREE_LANG_FLAG_1 (NODE))

/* The thunks associated with NODE, a FUNCTION_DECL.  */
#define DECL_THUNKS(NODE) \
  (LANG_DECL_FN_CHECK (NODE)->context)

/* Nonzero if NODE is a thunk, rather than an ordinary function.  */
#define DECL_THUNK_P(NODE)                      \
  (TREE_CODE (NODE) == FUNCTION_DECL            \
   && DECL_LANG_SPECIFIC (NODE)                 \
   && LANG_DECL_FN_CHECK (NODE)->thunk_p)

/* Set DECL_THUNK_P for node.  */
#define SET_DECL_THUNK_P(NODE, THIS_ADJUSTING)                  \
  (LANG_DECL_FN_CHECK (NODE)->thunk_p = 1,                      \
   LANG_DECL_FN_CHECK (NODE)->this_thunk_p = (THIS_ADJUSTING))

/* Nonzero if NODE is a this pointer adjusting thunk.  */
#define DECL_THIS_THUNK_P(NODE)                 \
  (DECL_THUNK_P (NODE) && LANG_DECL_FN_CHECK (NODE)->this_thunk_p)

/* Nonzero if NODE is a result pointer adjusting thunk.  */
#define DECL_RESULT_THUNK_P(NODE)                       \
  (DECL_THUNK_P (NODE) && !LANG_DECL_FN_CHECK (NODE)->this_thunk_p)

/* Nonzero if NODE is a FUNCTION_DECL, but not a thunk.  */
#define DECL_NON_THUNK_FUNCTION_P(NODE)                         \
  (TREE_CODE (NODE) == FUNCTION_DECL && !DECL_THUNK_P (NODE))

/* Nonzero if NODE is `extern "C"'.  */
#define DECL_EXTERN_C_P(NODE) \
  (DECL_LANGUAGE (NODE) == lang_c)

/* Nonzero if NODE is an `extern "C"' function.  */
#define DECL_EXTERN_C_FUNCTION_P(NODE) \
  (DECL_NON_THUNK_FUNCTION_P (NODE) && DECL_EXTERN_C_P (NODE))

/* True iff DECL is an entity with vague linkage whose definition is
   available in this translation unit.  */
#define DECL_REPO_AVAILABLE_P(NODE) \
  (DECL_LANG_SPECIFIC (NODE)->u.base.repo_available_p)

/* True if DECL is declared 'constexpr'.  */
#define DECL_DECLARED_CONSTEXPR_P(DECL) \
  DECL_LANG_FLAG_8 (VAR_OR_FUNCTION_DECL_CHECK (STRIP_TEMPLATE (DECL)))

/* Nonzero if this DECL is the __PRETTY_FUNCTION__ variable in a
   template function.  */
#define DECL_PRETTY_FUNCTION_P(NODE) \
  (TREE_LANG_FLAG_0 (VAR_DECL_CHECK (NODE)))

/* The _TYPE context in which this _DECL appears.  This field holds the
   class where a virtual function instance is actually defined.  */
#define DECL_CLASS_CONTEXT(NODE) \
  (DECL_CLASS_SCOPE_P (NODE) ? DECL_CONTEXT (NODE) : NULL_TREE)

/* For a non-member friend function, the class (if any) in which this
   friend was defined.  For example, given:

     struct S { friend void f (); };

   the DECL_FRIEND_CONTEXT for `f' will be `S'.  */
#define DECL_FRIEND_CONTEXT(NODE)                               \
  ((DECL_DECLARES_FUNCTION_P (NODE)                             \
    && DECL_FRIEND_P (NODE) && !DECL_FUNCTION_MEMBER_P (NODE))  \
   ? LANG_DECL_FN_CHECK (NODE)->context                         \
   : NULL_TREE)

/* Set the DECL_FRIEND_CONTEXT for NODE to CONTEXT.  */
#define SET_DECL_FRIEND_CONTEXT(NODE, CONTEXT) \
  (LANG_DECL_FN_CHECK (NODE)->context = (CONTEXT))

#define CP_DECL_CONTEXT(NODE) \
  (!DECL_FILE_SCOPE_P (NODE) ? DECL_CONTEXT (NODE) : global_namespace)
#define CP_TYPE_CONTEXT(NODE) \
  (!TYPE_FILE_SCOPE_P (NODE) ? TYPE_CONTEXT (NODE) : global_namespace)
#define FROB_CONTEXT(NODE) \
  ((NODE) == global_namespace ? DECL_CONTEXT (NODE) : (NODE))

/* 1 iff NODE has namespace scope, including the global namespace.  */
#define DECL_NAMESPACE_SCOPE_P(NODE)                            \
  (!DECL_TEMPLATE_PARM_P (NODE)                                 \
   && TREE_CODE (CP_DECL_CONTEXT (NODE)) == NAMESPACE_DECL)

#define TYPE_NAMESPACE_SCOPE_P(NODE) \
  (TREE_CODE (CP_TYPE_CONTEXT (NODE)) == NAMESPACE_DECL)

#define NAMESPACE_SCOPE_P(NODE) \
  ((DECL_P (NODE) && DECL_NAMESPACE_SCOPE_P (NODE)) \
   || (TYPE_P (NODE) && TYPE_NAMESPACE_SCOPE_P (NODE)))

/* 1 iff NODE is a class member.  */
#define DECL_CLASS_SCOPE_P(NODE) \
  (DECL_CONTEXT (NODE) && TYPE_P (DECL_CONTEXT (NODE)))

#define TYPE_CLASS_SCOPE_P(NODE) \
  (TYPE_CONTEXT (NODE) && TYPE_P (TYPE_CONTEXT (NODE)))

/* 1 iff NODE is function-local.  */
#define DECL_FUNCTION_SCOPE_P(NODE) \
  (DECL_CONTEXT (NODE) \
   && TREE_CODE (DECL_CONTEXT (NODE)) == FUNCTION_DECL)

#define TYPE_FUNCTION_SCOPE_P(NODE) \
  (TYPE_CONTEXT (NODE) && TREE_CODE (TYPE_CONTEXT (NODE)) == FUNCTION_DECL)

/* 1 iff VAR_DECL node NODE is a type-info decl.  This flag is set for
   both the primary typeinfo object and the associated NTBS name.  */
#define DECL_TINFO_P(NODE) TREE_LANG_FLAG_4 (VAR_DECL_CHECK (NODE))

/* 1 iff VAR_DECL node NODE is virtual table or VTT.  */
#define DECL_VTABLE_OR_VTT_P(NODE) TREE_LANG_FLAG_5 (VAR_DECL_CHECK (NODE))

/* Returns 1 iff VAR_DECL is a construction virtual table.
   DECL_VTABLE_OR_VTT_P will be true in this case and must be checked
   before using this macro.  */
#define DECL_CONSTRUCTION_VTABLE_P(NODE) \
  TREE_LANG_FLAG_6 (VAR_DECL_CHECK (NODE))

/* 1 iff NODE is function-local, but for types.  */
#define LOCAL_CLASS_P(NODE)                             \
  (decl_function_context (TYPE_MAIN_DECL (NODE)) != NULL_TREE)

/* For a NAMESPACE_DECL: the list of using namespace directives
   The PURPOSE is the used namespace, the value is the namespace
   that is the common ancestor.  */
#define DECL_NAMESPACE_USING(NODE) DECL_VINDEX (NAMESPACE_DECL_CHECK (NODE))

/* In a NAMESPACE_DECL, the DECL_INITIAL is used to record all users
   of a namespace, to record the transitive closure of using namespace.  */
#define DECL_NAMESPACE_USERS(NODE) DECL_INITIAL (NAMESPACE_DECL_CHECK (NODE))

/* In a NAMESPACE_DECL, the list of namespaces which have associated
   themselves with this one.  */
#define DECL_NAMESPACE_ASSOCIATIONS(NODE) \
  (NAMESPACE_DECL_CHECK (NODE)->decl_non_common.saved_tree)

/* In a NAMESPACE_DECL, points to the original namespace if this is
   a namespace alias.  */
#define DECL_NAMESPACE_ALIAS(NODE) \
        DECL_ABSTRACT_ORIGIN (NAMESPACE_DECL_CHECK (NODE))
#define ORIGINAL_NAMESPACE(NODE)  \
  (DECL_NAMESPACE_ALIAS (NODE) ? DECL_NAMESPACE_ALIAS (NODE) : (NODE))

/* Nonzero if NODE is the std namespace.  */
#define DECL_NAMESPACE_STD_P(NODE)                      \
  (TREE_CODE (NODE) == NAMESPACE_DECL                   \
   && CP_DECL_CONTEXT (NODE) == global_namespace        \
   && DECL_NAME (NODE) == std_identifier)

/* In a TREE_LIST concatenating using directives, indicate indirect
   directives  */
#define TREE_INDIRECT_USING(NODE) (TREE_LIST_CHECK (NODE)->base.lang_flag_0)

/* In a TREE_LIST in an attribute list, indicates that the attribute
   must be applied at instantiation time.  */
#define ATTR_IS_DEPENDENT(NODE) (TREE_LIST_CHECK (NODE)->base.lang_flag_0)

extern tree decl_shadowed_for_var_lookup (tree);
extern void decl_shadowed_for_var_insert (tree, tree);

/* Non zero if this is a using decl for a dependent scope. */
#define DECL_DEPENDENT_P(NODE) DECL_LANG_FLAG_0 (USING_DECL_CHECK (NODE))

/* The scope named in a using decl.  */
#define USING_DECL_SCOPE(NODE) TREE_TYPE (USING_DECL_CHECK (NODE))

/* The decls named by a using decl.  */
#define USING_DECL_DECLS(NODE) DECL_INITIAL (USING_DECL_CHECK (NODE))

/* Non zero if the using decl refers to a dependent type.  */
#define USING_DECL_TYPENAME_P(NODE) DECL_LANG_FLAG_1 (USING_DECL_CHECK (NODE))

/* In a VAR_DECL, true if we have a shadowed local variable
   in the shadowed var table for this VAR_DECL.  */
#define DECL_HAS_SHADOWED_FOR_VAR_P(NODE) \
  (VAR_DECL_CHECK (NODE)->decl_with_vis.shadowed_for_var_p)

/* In a VAR_DECL for a variable declared in a for statement,
   this is the shadowed (local) variable.  */
#define DECL_SHADOWED_FOR_VAR(NODE) \
  (DECL_HAS_SHADOWED_FOR_VAR_P(NODE) ? decl_shadowed_for_var_lookup (NODE) : NULL)

#define SET_DECL_SHADOWED_FOR_VAR(NODE, VAL) \
  (decl_shadowed_for_var_insert (NODE, VAL))

/* In a FUNCTION_DECL, this is nonzero if this function was defined in
   the class definition.  We have saved away the text of the function,
   but have not yet processed it.  */
#define DECL_PENDING_INLINE_P(NODE) \
  (LANG_DECL_FN_CHECK (NODE)->pending_inline_p)

/* If DECL_PENDING_INLINE_P holds, this is the saved text of the
   function.  */
#define DECL_PENDING_INLINE_INFO(NODE) \
  (LANG_DECL_FN_CHECK (NODE)->u.pending_inline_info)

/* Nonzero for TYPE_DECL means that it was written 'using name = type'.  */
#define TYPE_DECL_ALIAS_P(NODE) \
  DECL_LANG_FLAG_6 (TYPE_DECL_CHECK (NODE))

/* Nonzero for a type which is an alias for another type; i.e, a type
   which declaration was written 'using name-of-type =
   another-type'.  */
#define TYPE_ALIAS_P(NODE)                      \
  (TYPE_P (NODE)                                \
   && TYPE_NAME (NODE)                          \
   && TREE_CODE (TYPE_NAME (NODE)) == TYPE_DECL \
   && TYPE_DECL_ALIAS_P (TYPE_NAME (NODE)))

/* For a class type: if this structure has many fields, we'll sort them
   and put them into a TREE_VEC.  */
#define CLASSTYPE_SORTED_FIELDS(NODE) \
  (LANG_TYPE_CLASS_CHECK (NODE)->sorted_fields)

/* If non-NULL for a VAR_DECL, FUNCTION_DECL, TYPE_DECL or
   TEMPLATE_DECL, the entity is either a template specialization (if
   DECL_USE_TEMPLATE is nonzero) or the abstract instance of the
   template itself.

   In either case, DECL_TEMPLATE_INFO is a TREE_LIST, whose
   TREE_PURPOSE is the TEMPLATE_DECL of which this entity is a
   specialization or abstract instance.  The TREE_VALUE is the
   template arguments used to specialize the template.
   
   Consider:

      template <typename T> struct S { friend void f(T) {} };

   In this case, S<int>::f is, from the point of view of the compiler,
   an instantiation of a template -- but, from the point of view of
   the language, each instantiation of S results in a wholly unrelated
   global function f.  In this case, DECL_TEMPLATE_INFO for S<int>::f
   will be non-NULL, but DECL_USE_TEMPLATE will be zero.  */
#define DECL_TEMPLATE_INFO(NODE) \
  (DECL_LANG_SPECIFIC (VAR_TEMPL_TYPE_FIELD_OR_FUNCTION_DECL_CHECK (NODE)) \
   ->u.min.template_info)

/* For a VAR_DECL, indicates that the variable is actually a
   non-static data member of anonymous union that has been promoted to
   variable status.  */
#define DECL_ANON_UNION_VAR_P(NODE) \
  (DECL_LANG_FLAG_4 (VAR_DECL_CHECK (NODE)))

/* Template information for a RECORD_TYPE or UNION_TYPE.  */
#define CLASSTYPE_TEMPLATE_INFO(NODE) \
  (LANG_TYPE_CLASS_CHECK (RECORD_OR_UNION_CHECK (NODE))->template_info)

/* Template information for an ENUMERAL_TYPE.  Although an enumeration may
   not be a primary template, it may be declared within the scope of a
   primary template and the enumeration constants may depend on
   non-type template parameters.  */
#define ENUM_TEMPLATE_INFO(NODE) \
  (TYPE_LANG_SLOT_1 (ENUMERAL_TYPE_CHECK (NODE)))

/* Template information for a template template parameter.  */
#define TEMPLATE_TEMPLATE_PARM_TEMPLATE_INFO(NODE) \
  (LANG_TYPE_CLASS_CHECK (BOUND_TEMPLATE_TEMPLATE_PARM_TYPE_CHECK (NODE)) \
   ->template_info)

/* Template information for an ENUMERAL_, RECORD_, UNION_TYPE, or
   BOUND_TEMPLATE_TEMPLATE_PARM type.  Note that if NODE is a
   specialization of an alias template, this accessor returns the
   template info for the alias template, not the one (if any) for the
   template of the underlying type.  */
#define TYPE_TEMPLATE_INFO(NODE)                                        \
  (TYPE_ALIAS_P (NODE)                                                  \
   ? ((TYPE_NAME (NODE) && DECL_LANG_SPECIFIC (TYPE_NAME (NODE)))       \
      ? DECL_TEMPLATE_INFO (TYPE_NAME (NODE))                           \
      : NULL_TREE)                                                      \
   : ((TREE_CODE (NODE) == ENUMERAL_TYPE)                               \
      ? ENUM_TEMPLATE_INFO (NODE)                                       \
      : ((TREE_CODE (NODE) == BOUND_TEMPLATE_TEMPLATE_PARM)             \
         ? TEMPLATE_TEMPLATE_PARM_TEMPLATE_INFO (NODE)                  \
         : (CLASS_TYPE_P (NODE)                                         \
            ? CLASSTYPE_TEMPLATE_INFO (NODE)                            \
            : NULL_TREE))))


/* Set the template information for an ENUMERAL_, RECORD_, or
   UNION_TYPE to VAL.  */
#define SET_TYPE_TEMPLATE_INFO(NODE, VAL)                               \
  (TREE_CODE (NODE) == ENUMERAL_TYPE                                    \
   ? (ENUM_TEMPLATE_INFO (NODE) = (VAL))                                \
   : ((CLASS_TYPE_P (NODE) && !TYPE_ALIAS_P (NODE))                     \
      ? (CLASSTYPE_TEMPLATE_INFO (NODE) = (VAL))                        \
      : (DECL_TEMPLATE_INFO (TYPE_NAME (NODE)) = (VAL))))

#define TI_TEMPLATE(NODE) TREE_TYPE (TEMPLATE_INFO_CHECK (NODE))
#define TI_ARGS(NODE) TREE_CHAIN (TEMPLATE_INFO_CHECK (NODE))
#define TI_PENDING_TEMPLATE_FLAG(NODE) TREE_LANG_FLAG_1 (NODE)
/* For a given TREE_VEC containing a template argument list,
   this property contains the number of arguments that are not
   defaulted.  */
#define NON_DEFAULT_TEMPLATE_ARGS_COUNT(NODE) TREE_CHAIN (TREE_VEC_CHECK (NODE))
/* Below are the setter and getter of the NON_DEFAULT_TEMPLATE_ARGS_COUNT
   property.  */
#define SET_NON_DEFAULT_TEMPLATE_ARGS_COUNT(NODE, INT_VALUE) \
  NON_DEFAULT_TEMPLATE_ARGS_COUNT(NODE) = build_int_cst (NULL_TREE, INT_VALUE)
#ifdef ENABLE_CHECKING
#define GET_NON_DEFAULT_TEMPLATE_ARGS_COUNT(NODE) \
    int_cst_value (NON_DEFAULT_TEMPLATE_ARGS_COUNT (NODE))
#else
#define GET_NON_DEFAULT_TEMPLATE_ARGS_COUNT(NODE) \
  NON_DEFAULT_TEMPLATE_ARGS_COUNT (NODE) \
  ? int_cst_value (NON_DEFAULT_TEMPLATE_ARGS_COUNT (NODE)) \
  : TREE_VEC_LENGTH (INNERMOST_TEMPLATE_ARGS (NODE))
#endif
/* The list of typedefs - used in the template - that need
   access checking at template instantiation time.  */
#define TI_TYPEDEFS_NEEDING_ACCESS_CHECKING(NODE) \
  ((struct tree_template_info*)TEMPLATE_INFO_CHECK \
     (NODE))->typedefs_needing_access_checking

/* We use TREE_VECs to hold template arguments.  If there is only one
   level of template arguments, then the TREE_VEC contains the
   arguments directly.  If there is more than one level of template
   arguments, then each entry in the TREE_VEC is itself a TREE_VEC,
   containing the template arguments for a single level.  The first
   entry in the outer TREE_VEC is the outermost level of template
   parameters; the last is the innermost.

   It is incorrect to ever form a template argument vector containing
   only one level of arguments, but which is a TREE_VEC containing as
   its only entry the TREE_VEC for that level.

   For each TREE_VEC containing the template arguments for a single
   level, it's possible to get or set the number of non defaulted
   template arguments by using the accessor macros
   GET_NON_DEFAULT_TEMPLATE_ARGS_COUNT or
   SET_NON_DEFAULT_TEMPLATE_ARGS_COUNT.  */

/* Nonzero if the template arguments is actually a vector of vectors,
   rather than just a vector.  */
#define TMPL_ARGS_HAVE_MULTIPLE_LEVELS(NODE)                 \
  (NODE && TREE_VEC_LENGTH (NODE) && TREE_VEC_ELT (NODE, 0)  \
   && TREE_CODE (TREE_VEC_ELT (NODE, 0)) == TREE_VEC)

/* The depth of a template argument vector.  When called directly by
   the parser, we use a TREE_LIST rather than a TREE_VEC to represent
   template arguments.  In fact, we may even see NULL_TREE if there
   are no template arguments.  In both of those cases, there is only
   one level of template arguments.  */
#define TMPL_ARGS_DEPTH(NODE)                                   \
  (TMPL_ARGS_HAVE_MULTIPLE_LEVELS (NODE) ? TREE_VEC_LENGTH (NODE) : 1)

/* The LEVELth level of the template ARGS.  The outermost level of
   args is level 1, not level 0.  */
#define TMPL_ARGS_LEVEL(ARGS, LEVEL)            \
  (TMPL_ARGS_HAVE_MULTIPLE_LEVELS (ARGS)        \
   ? TREE_VEC_ELT (ARGS, (LEVEL) - 1) : (ARGS))

/* Set the LEVELth level of the template ARGS to VAL.  This macro does
   not work with single-level argument vectors.  */
#define SET_TMPL_ARGS_LEVEL(ARGS, LEVEL, VAL)   \
  (TREE_VEC_ELT (ARGS, (LEVEL) - 1) = (VAL))

/* Accesses the IDXth parameter in the LEVELth level of the ARGS.  */
#define TMPL_ARG(ARGS, LEVEL, IDX)                              \
  (TREE_VEC_ELT (TMPL_ARGS_LEVEL (ARGS, LEVEL), IDX))

/* Given a single level of template arguments in NODE, return the
   number of arguments.  */
#define NUM_TMPL_ARGS(NODE)                             \
  (TREE_VEC_LENGTH (NODE))

/* Returns the innermost level of template arguments in ARGS.  */
#define INNERMOST_TEMPLATE_ARGS(NODE) \
  (get_innermost_template_args ((NODE), 1))

/* The number of levels of template parameters given by NODE.  */
#define TMPL_PARMS_DEPTH(NODE) \
  ((HOST_WIDE_INT) TREE_INT_CST_LOW (TREE_PURPOSE (NODE)))

/* The TEMPLATE_DECL instantiated or specialized by NODE.  This
   TEMPLATE_DECL will be the immediate parent, not the most general
   template.  For example, in:

      template <class T> struct S { template <class U> void f(U); }

   the FUNCTION_DECL for S<int>::f<double> will have, as its
   DECL_TI_TEMPLATE, `template <class U> S<int>::f<U>'.

   As a special case, for a member friend template of a template
   class, this value will not be a TEMPLATE_DECL, but rather an
   IDENTIFIER_NODE or OVERLOAD indicating the name of the template and
   any explicit template arguments provided.  For example, in:

     template <class T> struct S { friend void f<int>(int, double); }

   the DECL_TI_TEMPLATE will be an IDENTIFIER_NODE for `f' and the
   DECL_TI_ARGS will be {int}.

   For a FIELD_DECL with a non-static data member initializer, this value
   is the FIELD_DECL it was instantiated from.  */
#define DECL_TI_TEMPLATE(NODE)      TI_TEMPLATE (DECL_TEMPLATE_INFO (NODE))

/* The template arguments used to obtain this decl from the most
   general form of DECL_TI_TEMPLATE.  For the example given for
   DECL_TI_TEMPLATE, the DECL_TI_ARGS will be {int, double}.  These
   are always the full set of arguments required to instantiate this
   declaration from the most general template specialized here.  */
#define DECL_TI_ARGS(NODE)          TI_ARGS (DECL_TEMPLATE_INFO (NODE))

/* The TEMPLATE_DECL associated with NODE, a class type.  Even if NODE
   will be generated from a partial specialization, the TEMPLATE_DECL
   referred to here will be the original template.  For example,
   given:

      template <typename T> struct S {};
      template <typename T> struct S<T*> {};
      
   the CLASSTPYE_TI_TEMPLATE for S<int*> will be S, not the S<T*>.  */
#define CLASSTYPE_TI_TEMPLATE(NODE) TI_TEMPLATE (CLASSTYPE_TEMPLATE_INFO (NODE))
#define CLASSTYPE_TI_ARGS(NODE)     TI_ARGS (CLASSTYPE_TEMPLATE_INFO (NODE))

/* For a template instantiation TYPE, returns the TYPE corresponding
   to the primary template.  Otherwise returns TYPE itself.  */
#define CLASSTYPE_PRIMARY_TEMPLATE_TYPE(TYPE)                           \
  ((CLASSTYPE_USE_TEMPLATE ((TYPE))                                     \
    && !CLASSTYPE_TEMPLATE_SPECIALIZATION ((TYPE)))                     \
   ? TREE_TYPE (DECL_TEMPLATE_RESULT (DECL_PRIMARY_TEMPLATE             \
                                      (CLASSTYPE_TI_TEMPLATE ((TYPE))))) \
   : (TYPE))

/* Like CLASS_TI_TEMPLATE, but also works for ENUMERAL_TYPEs.  */
#define TYPE_TI_TEMPLATE(NODE)                  \
  (TI_TEMPLATE (TYPE_TEMPLATE_INFO (NODE)))

/* Like DECL_TI_ARGS, but for an ENUMERAL_, RECORD_, or UNION_TYPE.  */
#define TYPE_TI_ARGS(NODE)                      \
  (TI_ARGS (TYPE_TEMPLATE_INFO (NODE)))

#define INNERMOST_TEMPLATE_PARMS(NODE)  TREE_VALUE (NODE)

/* Nonzero if NODE (a TEMPLATE_DECL) is a member template, in the
   sense of [temp.mem].  */
#define DECL_MEMBER_TEMPLATE_P(NODE) \
  (DECL_LANG_FLAG_1 (TEMPLATE_DECL_CHECK (NODE)))

/* Nonzero if the NODE corresponds to the template parameters for a
   member template, whose inline definition is being processed after
   the class definition is complete.  */
#define TEMPLATE_PARMS_FOR_INLINE(NODE) TREE_LANG_FLAG_1 (NODE)

/* Determine if a parameter (i.e., a PARM_DECL) is a function
   parameter pack.  */
#define FUNCTION_PARAMETER_PACK_P(NODE) \
  (DECL_LANG_FLAG_1 (PARM_DECL_CHECK (NODE)))

/* Determines if NODE is an expansion of one or more parameter packs,
   e.g., a TYPE_PACK_EXPANSION or EXPR_PACK_EXPANSION.  */
#define PACK_EXPANSION_P(NODE)                 \
  (TREE_CODE (NODE) == TYPE_PACK_EXPANSION     \
   || TREE_CODE (NODE) == EXPR_PACK_EXPANSION)

/* Extracts the type or expression pattern from a TYPE_PACK_EXPANSION or
   EXPR_PACK_EXPANSION.  */
#define PACK_EXPANSION_PATTERN(NODE)                            \
  (TREE_CODE (NODE) == TYPE_PACK_EXPANSION? TREE_TYPE (NODE)    \
   : TREE_OPERAND (NODE, 0))

/* Sets the type or expression pattern for a TYPE_PACK_EXPANSION or
   EXPR_PACK_EXPANSION.  */
#define SET_PACK_EXPANSION_PATTERN(NODE,VALUE)  \
  if (TREE_CODE (NODE) == TYPE_PACK_EXPANSION)  \
    TREE_TYPE (NODE) = VALUE;                   \
  else                                          \
    TREE_OPERAND (NODE, 0) = VALUE

/* The list of parameter packs used in the PACK_EXPANSION_* node. The
   TREE_VALUE of each TREE_LIST contains the parameter packs.  */
#define PACK_EXPANSION_PARAMETER_PACKS(NODE)            \
  *(TREE_CODE (NODE) == EXPR_PACK_EXPANSION             \
    ? &TREE_OPERAND (NODE, 1)                           \
    : &TYPE_MINVAL (TYPE_PACK_EXPANSION_CHECK (NODE)))

/* Any additional template args to be applied when substituting into
   the pattern, set by tsubst_pack_expansion for partial instantiations.  */
#define PACK_EXPANSION_EXTRA_ARGS(NODE)         \
  *(TREE_CODE (NODE) == TYPE_PACK_EXPANSION     \
    ? &TYPE_MAXVAL (NODE)                       \
    : &TREE_OPERAND ((NODE), 2))

/* Determine if this is an argument pack.  */
#define ARGUMENT_PACK_P(NODE)                          \
  (TREE_CODE (NODE) == TYPE_ARGUMENT_PACK              \
   || TREE_CODE (NODE) == NONTYPE_ARGUMENT_PACK)

/* The arguments stored in an argument pack. Arguments are stored in a
   TREE_VEC, which may have length zero.  */
#define ARGUMENT_PACK_ARGS(NODE)                               \
  (TREE_CODE (NODE) == TYPE_ARGUMENT_PACK? TREE_TYPE (NODE)    \
   : TREE_OPERAND (NODE, 0))

/* Set the arguments stored in an argument pack. VALUE must be a
   TREE_VEC.  */
#define SET_ARGUMENT_PACK_ARGS(NODE,VALUE)     \
  if (TREE_CODE (NODE) == TYPE_ARGUMENT_PACK)  \
    TREE_TYPE (NODE) = VALUE;                           \
  else                                                  \
    TREE_OPERAND (NODE, 0) = VALUE

/* Whether the argument pack is "incomplete", meaning that more
   arguments can still be deduced. Incomplete argument packs are only
   used when the user has provided an explicit template argument list
   for a variadic function template. Some of the explicit template
   arguments will be placed into the beginning of the argument pack,
   but additional arguments might still be deduced.  */
#define ARGUMENT_PACK_INCOMPLETE_P(NODE)        \
  TREE_LANG_FLAG_0 (ARGUMENT_PACK_ARGS (NODE))

/* When ARGUMENT_PACK_INCOMPLETE_P, stores the explicit template
   arguments used to fill this pack.  */
#define ARGUMENT_PACK_EXPLICIT_ARGS(NODE)       \
  TREE_TYPE (ARGUMENT_PACK_ARGS (NODE))

/* In an ARGUMENT_PACK_SELECT, the argument pack from which an
   argument will be selected.  */
#define ARGUMENT_PACK_SELECT_FROM_PACK(NODE)                            \
  (((struct tree_argument_pack_select *)ARGUMENT_PACK_SELECT_CHECK (NODE))->argument_pack)

/* In an ARGUMENT_PACK_SELECT, the index of the argument we want to
   select.  */
#define ARGUMENT_PACK_SELECT_INDEX(NODE)                                \
  (((struct tree_argument_pack_select *)ARGUMENT_PACK_SELECT_CHECK (NODE))->index)
  
/* In an ARGUMENT_PACK_SELECT, the actual underlying argument that the
   ARGUMENT_PACK_SELECT represents. */
#define ARGUMENT_PACK_SELECT_ARG(NODE)                                  \
  TREE_VEC_ELT (ARGUMENT_PACK_ARGS (ARGUMENT_PACK_SELECT_FROM_PACK (NODE)), \
                ARGUMENT_PACK_SELECT_INDEX (NODE));

/* In a FUNCTION_DECL, the saved language-specific per-function data.  */
#define DECL_SAVED_FUNCTION_DATA(NODE)                  \
  (LANG_DECL_FN_CHECK (FUNCTION_DECL_CHECK (NODE))      \
   ->u.saved_language_function)

/* True if NODE is an implicit INDIRECT_EXPR from convert_from_reference.  */
#define REFERENCE_REF_P(NODE)                           \
  (TREE_CODE (NODE) == INDIRECT_REF                     \
   && TREE_TYPE (TREE_OPERAND (NODE, 0))                \
   && (TREE_CODE (TREE_TYPE (TREE_OPERAND ((NODE), 0))) \
       == REFERENCE_TYPE))

#define NEW_EXPR_USE_GLOBAL(NODE) \
  TREE_LANG_FLAG_0 (NEW_EXPR_CHECK (NODE))
#define DELETE_EXPR_USE_GLOBAL(NODE) \
  TREE_LANG_FLAG_0 (DELETE_EXPR_CHECK (NODE))
#define DELETE_EXPR_USE_VEC(NODE) \
  TREE_LANG_FLAG_1 (DELETE_EXPR_CHECK (NODE))

/* Indicates that this is a non-dependent COMPOUND_EXPR which will
   resolve to a function call.  */
#define COMPOUND_EXPR_OVERLOADED(NODE) \
  TREE_LANG_FLAG_0 (COMPOUND_EXPR_CHECK (NODE))

/* In a CALL_EXPR appearing in a template, true if Koenig lookup
   should be performed at instantiation time.  */
#define KOENIG_LOOKUP_P(NODE) TREE_LANG_FLAG_0 (CALL_EXPR_CHECK (NODE))

/* Indicates whether a string literal has been parenthesized. Such
   usages are disallowed in certain circumstances.  */

#define PAREN_STRING_LITERAL_P(NODE) \
  TREE_LANG_FLAG_0 (STRING_CST_CHECK (NODE))

/* Nonzero if this AGGR_INIT_EXPR provides for initialization via a
   constructor call, rather than an ordinary function call.  */
#define AGGR_INIT_VIA_CTOR_P(NODE) \
  TREE_LANG_FLAG_0 (AGGR_INIT_EXPR_CHECK (NODE))

/* Nonzero if expanding this AGGR_INIT_EXPR should first zero-initialize
   the object.  */
#define AGGR_INIT_ZERO_FIRST(NODE) \
  TREE_LANG_FLAG_2 (AGGR_INIT_EXPR_CHECK (NODE))

/* AGGR_INIT_EXPR accessors.  These are equivalent to the CALL_EXPR
   accessors, except for AGGR_INIT_EXPR_SLOT (which takes the place of
   CALL_EXPR_STATIC_CHAIN).  */

#define AGGR_INIT_EXPR_FN(NODE) TREE_OPERAND (AGGR_INIT_EXPR_CHECK (NODE), 1)
#define AGGR_INIT_EXPR_SLOT(NODE) \
  TREE_OPERAND (AGGR_INIT_EXPR_CHECK (NODE), 2)
#define AGGR_INIT_EXPR_ARG(NODE, I) \
  TREE_OPERAND (AGGR_INIT_EXPR_CHECK (NODE), (I) + 3)
#define aggr_init_expr_nargs(NODE) (VL_EXP_OPERAND_LENGTH(NODE) - 3)

/* AGGR_INIT_EXPR_ARGP returns a pointer to the argument vector for NODE.
   We can't use &AGGR_INIT_EXPR_ARG (NODE, 0) because that will complain if
   the argument count is zero when checking is enabled.  Instead, do
   the pointer arithmetic to advance past the 3 fixed operands in a
   AGGR_INIT_EXPR.  That produces a valid pointer to just past the end of
   the operand array, even if it's not valid to dereference it.  */
#define AGGR_INIT_EXPR_ARGP(NODE) \
  (&(TREE_OPERAND (AGGR_INIT_EXPR_CHECK (NODE), 0)) + 3)

/* Abstract iterators for AGGR_INIT_EXPRs.  */

/* Structure containing iterator state.  */
typedef struct aggr_init_expr_arg_iterator_d {
  tree t;       /* the aggr_init_expr */
  int n;        /* argument count */
  int i;        /* next argument index */
} aggr_init_expr_arg_iterator;

/* Initialize the abstract argument list iterator object ITER with the
   arguments from AGGR_INIT_EXPR node EXP.  */
static inline void
init_aggr_init_expr_arg_iterator (tree exp,
                                       aggr_init_expr_arg_iterator *iter)
{
  iter->t = exp;
  iter->n = aggr_init_expr_nargs (exp);
  iter->i = 0;
}

/* Return the next argument from abstract argument list iterator object ITER,
   and advance its state.  Return NULL_TREE if there are no more arguments.  */
static inline tree
next_aggr_init_expr_arg (aggr_init_expr_arg_iterator *iter)
{
  tree result;
  if (iter->i >= iter->n)
    return NULL_TREE;
  result = AGGR_INIT_EXPR_ARG (iter->t, iter->i);
  iter->i++;
  return result;
}

/* Initialize the abstract argument list iterator object ITER, then advance
   past and return the first argument.  Useful in for expressions, e.g.
     for (arg = first_aggr_init_expr_arg (exp, &iter); arg;
          arg = next_aggr_init_expr_arg (&iter))   */
static inline tree
first_aggr_init_expr_arg (tree exp, aggr_init_expr_arg_iterator *iter)
{
  init_aggr_init_expr_arg_iterator (exp, iter);
  return next_aggr_init_expr_arg (iter);
}

/* Test whether there are more arguments in abstract argument list iterator
   ITER, without changing its state.  */
static inline bool
more_aggr_init_expr_args_p (const aggr_init_expr_arg_iterator *iter)
{
  return (iter->i < iter->n);
}

/* Iterate through each argument ARG of AGGR_INIT_EXPR CALL, using variable
   ITER (of type aggr_init_expr_arg_iterator) to hold the iteration state.  */
#define FOR_EACH_AGGR_INIT_EXPR_ARG(arg, iter, call)                    \
  for ((arg) = first_aggr_init_expr_arg ((call), &(iter)); (arg);       \
       (arg) = next_aggr_init_expr_arg (&(iter)))

/* VEC_INIT_EXPR accessors.  */
#define VEC_INIT_EXPR_SLOT(NODE) TREE_OPERAND (VEC_INIT_EXPR_CHECK (NODE), 0)
#define VEC_INIT_EXPR_INIT(NODE) TREE_OPERAND (VEC_INIT_EXPR_CHECK (NODE), 1)

/* Indicates that a VEC_INIT_EXPR is a potential constant expression.
   Only set when the current function is constexpr.  */
#define VEC_INIT_EXPR_IS_CONSTEXPR(NODE) \
  TREE_LANG_FLAG_0 (VEC_INIT_EXPR_CHECK (NODE))

/* Indicates that a VEC_INIT_EXPR is expressing value-initialization.  */
#define VEC_INIT_EXPR_VALUE_INIT(NODE) \
  TREE_LANG_FLAG_1 (VEC_INIT_EXPR_CHECK (NODE))

/* The condition under which this MUST_NOT_THROW_EXPR actually blocks
   exceptions.  NULL_TREE means 'true'.  */
#define MUST_NOT_THROW_COND(NODE) \
  TREE_OPERAND (MUST_NOT_THROW_EXPR_CHECK (NODE), 1)

/* The TYPE_MAIN_DECL for a class template type is a TYPE_DECL, not a
   TEMPLATE_DECL.  This macro determines whether or not a given class
   type is really a template type, as opposed to an instantiation or
   specialization of one.  */
#define CLASSTYPE_IS_TEMPLATE(NODE)  \
  (CLASSTYPE_TEMPLATE_INFO (NODE)    \
   && !CLASSTYPE_USE_TEMPLATE (NODE) \
   && PRIMARY_TEMPLATE_P (CLASSTYPE_TI_TEMPLATE (NODE)))

/* The name used by the user to name the typename type.  Typically,
   this is an IDENTIFIER_NODE, and the same as the DECL_NAME on the
   corresponding TYPE_DECL.  However, this may also be a
   TEMPLATE_ID_EXPR if we had something like `typename X::Y<T>'.  */
#define TYPENAME_TYPE_FULLNAME(NODE) \
  (TYPE_VALUES_RAW (TYPENAME_TYPE_CHECK (NODE)))

/* True if a TYPENAME_TYPE was declared as an "enum".  */
#define TYPENAME_IS_ENUM_P(NODE) \
  (TREE_LANG_FLAG_0 (TYPENAME_TYPE_CHECK (NODE)))

/* True if a TYPENAME_TYPE was declared as a "class", "struct", or
   "union".  */
#define TYPENAME_IS_CLASS_P(NODE) \
  (TREE_LANG_FLAG_1 (TYPENAME_TYPE_CHECK (NODE)))

/* True if a TYPENAME_TYPE is in the process of being resolved.  */
#define TYPENAME_IS_RESOLVING_P(NODE) \
  (TREE_LANG_FLAG_2 (TYPENAME_TYPE_CHECK (NODE)))

/* [class.virtual]

   A class that declares or inherits a virtual function is called a
   polymorphic class.  */
#define TYPE_POLYMORPHIC_P(NODE) (TREE_LANG_FLAG_2 (NODE))

/* Nonzero if this class has a virtual function table pointer.  */
#define TYPE_CONTAINS_VPTR_P(NODE)              \
  (TYPE_POLYMORPHIC_P (NODE) || CLASSTYPE_VBASECLASSES (NODE))

/* This flag is true of a local VAR_DECL if it was declared in a for
   statement, but we are no longer in the scope of the for.  */
#define DECL_DEAD_FOR_LOCAL(NODE) DECL_LANG_FLAG_7 (VAR_DECL_CHECK (NODE))

/* This flag is set on a VAR_DECL that is a DECL_DEAD_FOR_LOCAL
   if we already emitted a warning about using it.  */
#define DECL_ERROR_REPORTED(NODE) DECL_LANG_FLAG_0 (VAR_DECL_CHECK (NODE))

/* Nonzero if NODE is a FUNCTION_DECL (for a function with global
   scope) declared in a local scope.  */
#define DECL_LOCAL_FUNCTION_P(NODE) \
  DECL_LANG_FLAG_0 (FUNCTION_DECL_CHECK (NODE))

/* Nonzero if NODE is a DECL which we know about but which has not
   been explicitly declared, such as a built-in function or a friend
   declared inside a class.  In the latter case DECL_HIDDEN_FRIEND_P
   will be set.  */
#define DECL_ANTICIPATED(NODE) \
  (DECL_LANG_SPECIFIC (DECL_COMMON_CHECK (NODE))->u.base.anticipated_p)

/* Nonzero if NODE is a FUNCTION_DECL which was declared as a friend
   within a class but has not been declared in the surrounding scope.
   The function is invisible except via argument dependent lookup.  */
#define DECL_HIDDEN_FRIEND_P(NODE) \
  (LANG_DECL_FN_CHECK (DECL_COMMON_CHECK (NODE))->hidden_friend_p)

/* Nonzero if DECL has been declared threadprivate by
   #pragma omp threadprivate.  */
#define CP_DECL_THREADPRIVATE_P(DECL) \
  (DECL_LANG_SPECIFIC (VAR_DECL_CHECK (DECL))->u.base.threadprivate_or_deleted_p)

/* Nonzero if DECL was declared with '= delete'.  */
#define DECL_DELETED_FN(DECL) \
  (DECL_LANG_SPECIFIC (FUNCTION_DECL_CHECK (DECL))->u.base.threadprivate_or_deleted_p)

/* Nonzero if DECL was declared with '= default' (maybe implicitly).  */
#define DECL_DEFAULTED_FN(DECL) \
  (LANG_DECL_FN_CHECK (DECL)->defaulted_p)

/* Nonzero if DECL is explicitly defaulted in the class body.  */
#define DECL_DEFAULTED_IN_CLASS_P(DECL)                                 \
  (DECL_DEFAULTED_FN (DECL) && DECL_INITIALIZED_IN_CLASS_P (DECL))
/* Nonzero if DECL was defaulted outside the class body.  */
#define DECL_DEFAULTED_OUTSIDE_CLASS_P(DECL)                            \
  (DECL_DEFAULTED_FN (DECL)                                             \
   && !(DECL_ARTIFICIAL (DECL) || DECL_INITIALIZED_IN_CLASS_P (DECL)))

/* Record whether a typedef for type `int' was actually `signed int'.  */
#define C_TYPEDEF_EXPLICITLY_SIGNED(EXP) DECL_LANG_FLAG_1 (EXP)

/* Returns nonzero if DECL has external linkage, as specified by the
   language standard.  (This predicate may hold even when the
   corresponding entity is not actually given external linkage in the
   object file; see decl_linkage for details.)  */
#define DECL_EXTERNAL_LINKAGE_P(DECL) \
  (decl_linkage (DECL) == lk_external)

/* Keep these codes in ascending code order.  */

#define INTEGRAL_CODE_P(CODE)   \
  ((CODE) == ENUMERAL_TYPE      \
   || (CODE) == BOOLEAN_TYPE    \
   || (CODE) == INTEGER_TYPE)

/* [basic.fundamental]

   Types  bool, char, wchar_t, and the signed and unsigned integer types
   are collectively called integral types.

   Note that INTEGRAL_TYPE_P, as defined in tree.h, allows enumeration
   types as well, which is incorrect in C++.  Keep these checks in
   ascending code order.  */
#define CP_INTEGRAL_TYPE_P(TYPE)                \
  (TREE_CODE (TYPE) == BOOLEAN_TYPE             \
   || TREE_CODE (TYPE) == INTEGER_TYPE)

/* Returns true if TYPE is an integral or enumeration name.  Keep
   these checks in ascending code order.  */
#define INTEGRAL_OR_ENUMERATION_TYPE_P(TYPE) \
   (TREE_CODE (TYPE) == ENUMERAL_TYPE || CP_INTEGRAL_TYPE_P (TYPE))

/* Returns true if TYPE is an integral or unscoped enumeration type.  */
#define INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P(TYPE) \
   (UNSCOPED_ENUM_P (TYPE) || CP_INTEGRAL_TYPE_P (TYPE))

/* True if the class type TYPE is a literal type.  */
#define CLASSTYPE_LITERAL_P(TYPE)              \
   (LANG_TYPE_CLASS_CHECK (TYPE)->is_literal)

/* [basic.fundamental]

   Integral and floating types are collectively called arithmetic
   types.  

   As a GNU extension, we also accept complex types.

   Keep these checks in ascending code order.  */
#define ARITHMETIC_TYPE_P(TYPE) \
  (CP_INTEGRAL_TYPE_P (TYPE) \
   || TREE_CODE (TYPE) == REAL_TYPE \
   || TREE_CODE (TYPE) == COMPLEX_TYPE)

/* True iff TYPE is cv decltype(nullptr).  */
#define NULLPTR_TYPE_P(TYPE) (TREE_CODE (TYPE) == NULLPTR_TYPE)

/* [basic.types]

   Arithmetic types, enumeration types, pointer types,
   pointer-to-member types, and std::nullptr_t are collectively called
   scalar types.
   
   Keep these checks in ascending code order.  */
#define SCALAR_TYPE_P(TYPE)                     \
  (TYPE_PTRMEM_P (TYPE)                         \
   || TREE_CODE (TYPE) == ENUMERAL_TYPE         \
   || ARITHMETIC_TYPE_P (TYPE)                  \
   || TYPE_PTR_P (TYPE)                         \
   || TYPE_PTRMEMFUNC_P (TYPE)                  \
   || NULLPTR_TYPE_P (TYPE))

/* Determines whether this type is a C++0x scoped enumeration
   type. Scoped enumerations types are introduced via "enum class" or
   "enum struct", e.g.,

     enum class Color {
       Red, Green, Blue
     };

   Scoped enumeration types are different from normal (unscoped)
   enumeration types in several ways:
   
     - The enumerators of a scoped enumeration type are only available
       within the scope of the enumeration type and not in the
       enclosing scope. For example, the Red color can be referred to
       with "Color::Red" but not "Red".

     - Scoped enumerators and enumerations do not implicitly convert
       to integers or 'bool'.

     - The underlying type of the enum is well-defined.  */
#define SCOPED_ENUM_P(TYPE)                                             \
  (TREE_CODE (TYPE) == ENUMERAL_TYPE && ENUM_IS_SCOPED (TYPE))

/* Determine whether this is an unscoped enumeration type.  */
#define UNSCOPED_ENUM_P(TYPE)                                           \
  (TREE_CODE (TYPE) == ENUMERAL_TYPE && !ENUM_IS_SCOPED (TYPE))

/* Set the flag indicating whether an ENUMERAL_TYPE is a C++0x scoped
   enumeration type (1) or a normal (unscoped) enumeration type
   (0).  */
#define SET_SCOPED_ENUM_P(TYPE, VAL)                    \
  (ENUM_IS_SCOPED (TYPE) = (VAL))

#define SET_OPAQUE_ENUM_P(TYPE, VAL)                    \
  (ENUM_IS_OPAQUE (TYPE) = (VAL))

#define OPAQUE_ENUM_P(TYPE)                             \
  (TREE_CODE (TYPE) == ENUMERAL_TYPE && ENUM_IS_OPAQUE (TYPE))

/* Determines whether an ENUMERAL_TYPE has an explicit
   underlying type.  */
#define ENUM_FIXED_UNDERLYING_TYPE_P(NODE) (TYPE_LANG_FLAG_5 (NODE))

/* Returns the underlying type of the given enumeration type. The
   underlying type is determined in different ways, depending on the
   properties of the enum:

     - In C++0x, the underlying type can be explicitly specified, e.g.,

         enum E1 : char { ... } // underlying type is char

     - In a C++0x scoped enumeration, the underlying type is int
       unless otherwises specified:

         enum class E2 { ... } // underlying type is int

     - Otherwise, the underlying type is determined based on the
       values of the enumerators. In this case, the
       ENUM_UNDERLYING_TYPE will not be set until after the definition
       of the enumeration is completed by finish_enum.  */
#define ENUM_UNDERLYING_TYPE(TYPE) \
  TREE_TYPE (ENUMERAL_TYPE_CHECK (TYPE))

/* [dcl.init.aggr]

   An aggregate is an array or a class with no user-provided
   constructors, no brace-or-equal-initializers for non-static data
   members, no private or protected non-static data members, no
   base classes, and no virtual functions.

   As an extension, we also treat vectors as aggregates.  Keep these
   checks in ascending code order.  */
#define CP_AGGREGATE_TYPE_P(TYPE)                               \
  (TREE_CODE (TYPE) == VECTOR_TYPE                              \
   ||TREE_CODE (TYPE) == ARRAY_TYPE                             \
   || (CLASS_TYPE_P (TYPE) && !CLASSTYPE_NON_AGGREGATE (TYPE)))

/* Nonzero for a class type means that the class type has a
   user-declared constructor.  */
#define TYPE_HAS_USER_CONSTRUCTOR(NODE) (TYPE_LANG_FLAG_1 (NODE))

/* When appearing in an INDIRECT_REF, it means that the tree structure
   underneath is actually a call to a constructor.  This is needed
   when the constructor must initialize local storage (which can
   be automatically destroyed), rather than allowing it to allocate
   space from the heap.

   When appearing in a SAVE_EXPR, it means that underneath
   is a call to a constructor.

   When appearing in a CONSTRUCTOR, the expression is a
   compound literal.

   When appearing in a FIELD_DECL, it means that this field
   has been duly initialized in its constructor.  */
#define TREE_HAS_CONSTRUCTOR(NODE) (TREE_LANG_FLAG_4 (NODE))

/* True if NODE is a brace-enclosed initializer.  */
#define BRACE_ENCLOSED_INITIALIZER_P(NODE) \
  (TREE_CODE (NODE) == CONSTRUCTOR && TREE_TYPE (NODE) == init_list_type_node)

/* True if NODE is a compound-literal, i.e., a brace-enclosed
   initializer cast to a particular type.  */
#define COMPOUND_LITERAL_P(NODE) \
  (TREE_CODE (NODE) == CONSTRUCTOR && TREE_HAS_CONSTRUCTOR (NODE))

#define EMPTY_CONSTRUCTOR_P(NODE) (TREE_CODE (NODE) == CONSTRUCTOR \
                                   && VEC_empty (constructor_elt, \
                                                 CONSTRUCTOR_ELTS (NODE)) \
                                   && !TREE_HAS_CONSTRUCTOR (NODE))

/* True if NODE is a init-list used as a direct-initializer, i.e.
   B b{1,2}, not B b({1,2}) or B b = {1,2}.  */
#define CONSTRUCTOR_IS_DIRECT_INIT(NODE) (TREE_LANG_FLAG_0 (CONSTRUCTOR_CHECK (NODE)))

/* True if NODE represents a conversion for direct-initialization in a
   template.  Set by perform_implicit_conversion_flags.  */
#define IMPLICIT_CONV_EXPR_DIRECT_INIT(NODE) \
  (TREE_LANG_FLAG_0 (IMPLICIT_CONV_EXPR_CHECK (NODE)))

/* Nonzero means that an object of this type can not be initialized using
   an initializer list.  */
#define CLASSTYPE_NON_AGGREGATE(NODE) \
  (LANG_TYPE_CLASS_CHECK (NODE)->non_aggregate)
#define TYPE_NON_AGGREGATE_CLASS(NODE) \
  (CLASS_TYPE_P (NODE) && CLASSTYPE_NON_AGGREGATE (NODE))

/* Nonzero if there is a non-trivial X::op=(cv X&) for this class.  */
#define TYPE_HAS_COMPLEX_COPY_ASSIGN(NODE) (LANG_TYPE_CLASS_CHECK (NODE)->has_complex_copy_assign)

/* Nonzero if there is a non-trivial X::X(cv X&) for this class.  */
#define TYPE_HAS_COMPLEX_COPY_CTOR(NODE) (LANG_TYPE_CLASS_CHECK (NODE)->has_complex_copy_ctor)

/* Nonzero if there is a non-trivial X::op=(X&&) for this class.  */
#define TYPE_HAS_COMPLEX_MOVE_ASSIGN(NODE) (LANG_TYPE_CLASS_CHECK (NODE)->has_complex_move_assign)

/* Nonzero if there is a non-trivial X::X(X&&) for this class.  */
#define TYPE_HAS_COMPLEX_MOVE_CTOR(NODE) (LANG_TYPE_CLASS_CHECK (NODE)->has_complex_move_ctor)

/* Nonzero if there is a non-trivial default constructor for this class.  */
#define TYPE_HAS_COMPLEX_DFLT(NODE) (LANG_TYPE_CLASS_CHECK (NODE)->has_complex_dflt)

/* Nonzero if TYPE has a trivial destructor.  From [class.dtor]:

     A destructor is trivial if it is an implicitly declared
     destructor and if:

       - all of the direct base classes of its class have trivial
         destructors,

       - for all of the non-static data members of its class that are
         of class type (or array thereof), each such class has a
         trivial destructor.  */
#define TYPE_HAS_TRIVIAL_DESTRUCTOR(NODE) \
  (!TYPE_HAS_NONTRIVIAL_DESTRUCTOR (NODE))

/* Nonzero for _TYPE node means that this type does not have a trivial
   destructor.  Therefore, destroying an object of this type will
   involve a call to a destructor.  This can apply to objects of
   ARRAY_TYPE is the type of the elements needs a destructor.  */
#define TYPE_HAS_NONTRIVIAL_DESTRUCTOR(NODE) \
  (TYPE_LANG_FLAG_4 (NODE))

/* Nonzero for class type means that the default constructor is trivial.  */
#define TYPE_HAS_TRIVIAL_DFLT(NODE) \
  (TYPE_HAS_DEFAULT_CONSTRUCTOR (NODE) && ! TYPE_HAS_COMPLEX_DFLT (NODE))

/* Nonzero for class type means that copy initialization of this type can use
   a bitwise copy.  */
#define TYPE_HAS_TRIVIAL_COPY_CTOR(NODE) \
  (TYPE_HAS_COPY_CTOR (NODE) && ! TYPE_HAS_COMPLEX_COPY_CTOR (NODE))

/* Nonzero for class type means that assignment of this type can use
   a bitwise copy.  */
#define TYPE_HAS_TRIVIAL_COPY_ASSIGN(NODE) \
  (TYPE_HAS_COPY_ASSIGN (NODE) && ! TYPE_HAS_COMPLEX_COPY_ASSIGN (NODE))

/* Returns true if NODE is a pointer-to-data-member.  */
#define TYPE_PTRMEM_P(NODE)                     \
  (TREE_CODE (NODE) == OFFSET_TYPE)
/* Returns true if NODE is a pointer.  */
#define TYPE_PTR_P(NODE)                        \
  (TREE_CODE (NODE) == POINTER_TYPE)

/* Returns true if NODE is an object type:

     [basic.types]

     An object type is a (possibly cv-qualified) type that is not a
     function type, not a reference type, and not a void type.

   Keep these checks in ascending order, for speed.  */
#define TYPE_OBJ_P(NODE)                        \
  (TREE_CODE (NODE) != REFERENCE_TYPE           \
   && TREE_CODE (NODE) != VOID_TYPE             \
   && TREE_CODE (NODE) != FUNCTION_TYPE         \
   && TREE_CODE (NODE) != METHOD_TYPE)

/* Returns true if NODE is a pointer to an object.  Keep these checks
   in ascending tree code order.  */
#define TYPE_PTROB_P(NODE)                                      \
  (TYPE_PTR_P (NODE) && TYPE_OBJ_P (TREE_TYPE (NODE)))

/* Returns true if NODE is a reference to an object.  Keep these checks
   in ascending tree code order.  */
#define TYPE_REF_OBJ_P(NODE)                                    \
  (TREE_CODE (NODE) == REFERENCE_TYPE && TYPE_OBJ_P (TREE_TYPE (NODE)))

/* Returns true if NODE is a pointer to an object, or a pointer to
   void.  Keep these checks in ascending tree code order.  */
#define TYPE_PTROBV_P(NODE)                                     \
  (TYPE_PTR_P (NODE)                                            \
   && !(TREE_CODE (TREE_TYPE (NODE)) == FUNCTION_TYPE           \
        || TREE_CODE (TREE_TYPE (NODE)) == METHOD_TYPE))

/* Returns true if NODE is a pointer to function.  */
#define TYPE_PTRFN_P(NODE)                              \
  (TREE_CODE (NODE) == POINTER_TYPE                     \
   && TREE_CODE (TREE_TYPE (NODE)) == FUNCTION_TYPE)

/* Returns true if NODE is a reference to function.  */
#define TYPE_REFFN_P(NODE)                              \
  (TREE_CODE (NODE) == REFERENCE_TYPE                   \
   && TREE_CODE (TREE_TYPE (NODE)) == FUNCTION_TYPE)

/* Nonzero for _TYPE node means that this type is a pointer to member
   function type.  */
#define TYPE_PTRMEMFUNC_P(NODE)         \
  (TREE_CODE (NODE) == RECORD_TYPE      \
   && TYPE_LANG_SPECIFIC (NODE)         \
   && TYPE_PTRMEMFUNC_FLAG (NODE))

#define TYPE_PTRMEMFUNC_FLAG(NODE) \
  (LANG_TYPE_CLASS_CHECK (NODE)->ptrmemfunc_flag)

/* Returns true if NODE is a pointer-to-member.  */
#define TYPE_PTR_TO_MEMBER_P(NODE) \
  (TYPE_PTRMEM_P (NODE) || TYPE_PTRMEMFUNC_P (NODE))

/* Indicates when overload resolution may resolve to a pointer to
   member function. [expr.unary.op]/3 */
#define PTRMEM_OK_P(NODE) \
  TREE_LANG_FLAG_0 (TREE_CHECK3 ((NODE), ADDR_EXPR, OFFSET_REF, SCOPE_REF))

/* Get the POINTER_TYPE to the METHOD_TYPE associated with this
   pointer to member function.  TYPE_PTRMEMFUNC_P _must_ be true,
   before using this macro.  */
#define TYPE_PTRMEMFUNC_FN_TYPE(NODE) \
  (TREE_TYPE (TYPE_FIELDS (NODE)))

/* Returns `A' for a type like `int (A::*)(double)' */
#define TYPE_PTRMEMFUNC_OBJECT_TYPE(NODE) \
  TYPE_METHOD_BASETYPE (TREE_TYPE (TYPE_PTRMEMFUNC_FN_TYPE (NODE)))

/* These are use to manipulate the canonical RECORD_TYPE from the
   hashed POINTER_TYPE, and can only be used on the POINTER_TYPE.  */
#define TYPE_GET_PTRMEMFUNC_TYPE(NODE) \
  (TYPE_LANG_SPECIFIC (NODE) ? LANG_TYPE_PTRMEM_CHECK (NODE)->record : NULL)
#define TYPE_SET_PTRMEMFUNC_TYPE(NODE, VALUE)                           \
  do {                                                                  \
    if (TYPE_LANG_SPECIFIC (NODE) == NULL)                              \
      {                                                                 \
        TYPE_LANG_SPECIFIC (NODE) = ggc_alloc_cleared_lang_type         \
         (sizeof (struct lang_type_ptrmem));                            \
        TYPE_LANG_SPECIFIC (NODE)->u.ptrmem.h.is_lang_type_class = 0;   \
      }                                                                 \
    TYPE_LANG_SPECIFIC (NODE)->u.ptrmem.record = (VALUE);               \
  } while (0)

/* For a pointer-to-member type of the form `T X::*', this is `X'.
   For a type like `void (X::*)() const', this type is `X', not `const
   X'.  To get at the `const X' you have to look at the
   TYPE_PTRMEM_POINTED_TO_TYPE; there, the first parameter will have
   type `const X*'.  */
#define TYPE_PTRMEM_CLASS_TYPE(NODE)                    \
  (TYPE_PTRMEM_P (NODE)                                 \
   ? TYPE_OFFSET_BASETYPE (NODE)                \
   : TYPE_PTRMEMFUNC_OBJECT_TYPE (NODE))

/* For a pointer-to-member type of the form `T X::*', this is `T'.  */
#define TYPE_PTRMEM_POINTED_TO_TYPE(NODE)               \
   (TYPE_PTRMEM_P (NODE)                                \
    ? TREE_TYPE (NODE)                                  \
    : TREE_TYPE (TYPE_PTRMEMFUNC_FN_TYPE (NODE)))

/* For a pointer-to-member constant `X::Y' this is the RECORD_TYPE for
   `X'.  */
#define PTRMEM_CST_CLASS(NODE) \
  TYPE_PTRMEM_CLASS_TYPE (TREE_TYPE (PTRMEM_CST_CHECK (NODE)))

/* For a pointer-to-member constant `X::Y' this is the _DECL for
   `Y'.  */
#define PTRMEM_CST_MEMBER(NODE) (((ptrmem_cst_t)PTRMEM_CST_CHECK (NODE))->member)

/* The expression in question for a TYPEOF_TYPE.  */
#define TYPEOF_TYPE_EXPR(NODE) (TYPE_VALUES_RAW (TYPEOF_TYPE_CHECK (NODE)))

/* The type in question for an UNDERLYING_TYPE.  */
#define UNDERLYING_TYPE_TYPE(NODE) \
  (TYPE_VALUES_RAW (UNDERLYING_TYPE_CHECK (NODE)))

/* The type in question for BASES.  */
#define BASES_TYPE(NODE) \
  (TYPE_VALUES_RAW (BASES_CHECK (NODE)))

#define BASES_DIRECT(NODE) \
  TREE_LANG_FLAG_0 (BASES_CHECK (NODE))

/* The expression in question for a DECLTYPE_TYPE.  */
#define DECLTYPE_TYPE_EXPR(NODE) (TYPE_VALUES_RAW (DECLTYPE_TYPE_CHECK (NODE)))

/* Whether the DECLTYPE_TYPE_EXPR of NODE was originally parsed as an
   id-expression or a member-access expression. When false, it was
   parsed as a full expression.  */
#define DECLTYPE_TYPE_ID_EXPR_OR_MEMBER_ACCESS_P(NODE) \
  (DECLTYPE_TYPE_CHECK (NODE))->type_common.string_flag

/* These flags indicate that we want different semantics from normal
   decltype: lambda capture just drops references, lambda proxies look