/* Separate lexical analyzer for GNU C++.
Copyright (C) 1987, 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
- 1999, 2000, 2001, 2002, 2003, 2004 Free Software Foundation, Inc.
+ 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2007, 2008
+ Free Software Foundation, Inc.
Hacked 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 2, or (at your option)
+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,
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 COPYING. If not, write to
-the Free Software Foundation, 59 Temple Place - Suite 330,
-Boston, MA 02111-1307, USA. */
+along with GCC; see the file COPYING3. If not see
+<http://www.gnu.org/licenses/>. */
/* This file is the lexical analyzer for GNU C++. */
static struct impl_files *impl_file_chain;
\f
-int interface_only; /* whether or not current file is only for
- interface definitions. */
-int interface_unknown; /* whether or not we know this class
- to behave according to #pragma interface. */
-
-\f
void
cxx_finish (void)
{
: &operator_name_info[(int) CODE]); \
oni->identifier = identifier; \
oni->name = NAME; \
- oni->mangled_name = MANGLING; \
+ oni->mangled_name = MANGLING; \
oni->arity = ARITY;
#include "operators.def"
operator_name_info [(int) ABS_EXPR].name = "abs";
operator_name_info [(int) TRUTH_AND_EXPR].name = "strict &&";
operator_name_info [(int) TRUTH_OR_EXPR].name = "strict ||";
- operator_name_info [(int) IN_EXPR].name = "in";
operator_name_info [(int) RANGE_EXPR].name = "...";
- operator_name_info [(int) CONVERT_EXPR].name = "+";
+ operator_name_info [(int) UNARY_PLUS_EXPR].name = "+";
assignment_operator_name_info [(int) EXACT_DIV_EXPR].name
= "(exact /=)";
_true_. */
#define D_EXT 0x01 /* GCC extension */
#define D_ASM 0x02 /* in C99, but has a switch to turn it off */
+#define D_OBJC 0x04 /* Objective C++ only */
+#define D_CXX0X 0x08 /* C++0x only */
CONSTRAINT(ridbits_fit, RID_LAST_MODIFIER < sizeof(unsigned long) * CHAR_BIT);
{ "_Complex", RID_COMPLEX, 0 },
{ "__FUNCTION__", RID_FUNCTION_NAME, 0 },
{ "__PRETTY_FUNCTION__", RID_PRETTY_FUNCTION_NAME, 0 },
- { "__alignof", RID_ALIGNOF, 0 },
+ { "__alignof", RID_ALIGNOF, 0 },
{ "__alignof__", RID_ALIGNOF, 0 },
{ "__asm", RID_ASM, 0 },
{ "__asm__", RID_ASM, 0 },
{ "__complex__", RID_COMPLEX, 0 },
{ "__const", RID_CONST, 0 },
{ "__const__", RID_CONST, 0 },
+ { "__decltype", RID_DECLTYPE, 0 },
{ "__extension__", RID_EXTENSION, 0 },
{ "__func__", RID_C99_FUNCTION_NAME, 0 },
+ { "__has_nothrow_assign", RID_HAS_NOTHROW_ASSIGN, 0 },
+ { "__has_nothrow_constructor", RID_HAS_NOTHROW_CONSTRUCTOR, 0 },
+ { "__has_nothrow_copy", RID_HAS_NOTHROW_COPY, 0 },
+ { "__has_trivial_assign", RID_HAS_TRIVIAL_ASSIGN, 0 },
+ { "__has_trivial_constructor", RID_HAS_TRIVIAL_CONSTRUCTOR, 0 },
+ { "__has_trivial_copy", RID_HAS_TRIVIAL_COPY, 0 },
+ { "__has_trivial_destructor", RID_HAS_TRIVIAL_DESTRUCTOR, 0 },
+ { "__has_virtual_destructor", RID_HAS_VIRTUAL_DESTRUCTOR, 0 },
+ { "__is_abstract", RID_IS_ABSTRACT, 0 },
+ { "__is_base_of", RID_IS_BASE_OF, 0 },
+ { "__is_class", RID_IS_CLASS, 0 },
+ { "__is_convertible_to", RID_IS_CONVERTIBLE_TO, 0 },
+ { "__is_empty", RID_IS_EMPTY, 0 },
+ { "__is_enum", RID_IS_ENUM, 0 },
+ { "__is_pod", RID_IS_POD, 0 },
+ { "__is_polymorphic", RID_IS_POLYMORPHIC, 0 },
+ { "__is_union", RID_IS_UNION, 0 },
{ "__imag", RID_IMAGPART, 0 },
{ "__imag__", RID_IMAGPART, 0 },
{ "__inline", RID_INLINE, 0 },
{ "const", RID_CONST, 0 },
{ "const_cast", RID_CONSTCAST, 0 },
{ "continue", RID_CONTINUE, 0 },
+ { "decltype", RID_DECLTYPE, D_CXX0X },
{ "default", RID_DEFAULT, 0 },
{ "delete", RID_DELETE, 0 },
{ "do", RID_DO, 0 },
{ "signed", RID_SIGNED, 0 },
{ "sizeof", RID_SIZEOF, 0 },
{ "static", RID_STATIC, 0 },
+ { "static_assert", RID_STATIC_ASSERT, D_CXX0X },
{ "static_cast", RID_STATCAST, 0 },
{ "struct", RID_STRUCT, 0 },
{ "switch", RID_SWITCH, 0 },
{ "virtual", RID_VIRTUAL, 0 },
{ "void", RID_VOID, 0 },
{ "volatile", RID_VOLATILE, 0 },
- { "wchar_t", RID_WCHAR, 0 },
+ { "wchar_t", RID_WCHAR, 0 },
{ "while", RID_WHILE, 0 },
+ /* The remaining keywords are specific to Objective-C++. NB:
+ All of them will remain _disabled_, since they are context-
+ sensitive. */
+
+ /* These ObjC keywords are recognized only immediately after
+ an '@'. NB: The following C++ keywords double as
+ ObjC keywords in this context: RID_CLASS, RID_PRIVATE,
+ RID_PROTECTED, RID_PUBLIC, RID_THROW, RID_TRY and RID_CATCH. */
+ { "compatibility_alias", RID_AT_ALIAS, D_OBJC },
+ { "defs", RID_AT_DEFS, D_OBJC },
+ { "encode", RID_AT_ENCODE, D_OBJC },
+ { "end", RID_AT_END, D_OBJC },
+ { "implementation", RID_AT_IMPLEMENTATION, D_OBJC },
+ { "interface", RID_AT_INTERFACE, D_OBJC },
+ { "protocol", RID_AT_PROTOCOL, D_OBJC },
+ { "selector", RID_AT_SELECTOR, D_OBJC },
+ { "finally", RID_AT_FINALLY, D_OBJC },
+ { "synchronized", RID_AT_SYNCHRONIZED, D_OBJC },
+ /* These are recognized only in protocol-qualifier context. */
+ { "bycopy", RID_BYCOPY, D_OBJC },
+ { "byref", RID_BYREF, D_OBJC },
+ { "in", RID_IN, D_OBJC },
+ { "inout", RID_INOUT, D_OBJC },
+ { "oneway", RID_ONEWAY, D_OBJC },
+ { "out", RID_OUT, D_OBJC },
};
void
unsigned int i;
tree id;
int mask = ((flag_no_asm ? D_ASM : 0)
- | (flag_no_gnu_keywords ? D_EXT : 0));
+ | D_OBJC
+ | (flag_no_gnu_keywords ? D_EXT : 0)
+ | ((cxx_dialect == cxx0x) ? 0 : D_CXX0X));
- ridpointers = ggc_calloc ((int) RID_MAX, sizeof (tree));
+ ridpointers = GGC_CNEWVEC (tree, (int) RID_MAX);
for (i = 0; i < ARRAY_SIZE (reswords); i++)
{
id = get_identifier (reswords[i].word);
c_register_pragma ("GCC", "java_exceptions", handle_pragma_java_exceptions);
}
\f
+/* TRUE if a code represents a statement. */
+
+bool statement_code_p[MAX_TREE_CODES];
+
/* Initialize the C++ front end. This function is very sensitive to
the exact order that things are done here. It would be nice if the
initialization done by this routine were moved to its subroutines,
bool
cxx_init (void)
{
+ location_t saved_loc;
+ unsigned int i;
static const enum tree_code stmt_codes[] = {
- c_common_stmt_codes,
- cp_stmt_codes
+ CTOR_INITIALIZER, TRY_BLOCK, HANDLER,
+ EH_SPEC_BLOCK, USING_STMT, TAG_DEFN,
+ IF_STMT, CLEANUP_STMT, FOR_STMT,
+ WHILE_STMT, DO_STMT, BREAK_STMT,
+ CONTINUE_STMT, SWITCH_STMT, EXPR_STMT
};
- INIT_STATEMENT_CODES (stmt_codes);
+ memset (&statement_code_p, 0, sizeof (statement_code_p));
+ for (i = 0; i < ARRAY_SIZE (stmt_codes); i++)
+ statement_code_p[stmt_codes[i]] = true;
- /* We cannot just assign to input_filename because it has already
- been initialized and will be used later as an N_BINCL for stabs+
- debugging. */
-#ifdef USE_MAPPED_LOCATION
- push_srcloc (BUILTINS_LOCATION);
-#else
- push_srcloc ("<built-in>", 0);
-#endif
+ saved_loc = input_location;
+ input_location = BUILTINS_LOCATION;
init_reswords ();
init_tree ();
cxx_init_decl_processing ();
- /* Create the built-in __null node. */
- null_node = build_int_2 (0, 0);
- TREE_TYPE (null_node) = c_common_type_for_size (POINTER_SIZE, 0);
- ridpointers[RID_NULL] = null_node;
-
- interface_unknown = 1;
+ /* The fact that G++ uses COMDAT for many entities (inline
+ functions, template instantiations, virtual tables, etc.) mean
+ that it is fundamentally unreliable to try to make decisions
+ about whether or not to output a particular entity until the end
+ of the compilation. However, the inliner requires that functions
+ be provided to the back end if they are to be inlined.
+ Therefore, we always use unit-at-a-time mode; in that mode, we
+ can provide entities to the back end and it will decide what to
+ emit based on what is actually needed. */
+ flag_unit_at_a_time = 1;
if (c_common_init () == false)
{
- pop_srcloc();
+ input_location = saved_loc;
return false;
}
init_cp_pragma ();
- init_repo (main_input_filename);
+ init_repo ();
- pop_srcloc();
+ input_location = saved_loc;
return true;
}
\f
-/* Helper function to load global variables with interface
- information. */
-
-void
-extract_interface_info (void)
-{
- struct c_fileinfo *finfo;
-
- finfo = get_fileinfo (input_filename);
- interface_only = finfo->interface_only;
- interface_unknown = finfo->interface_unknown;
-}
-
/* Return nonzero if S is not considered part of an
INTERFACE/IMPLEMENTATION pair. Otherwise, return 0. */
tree result, x;
enum cpp_ttype t;
- t = c_lex (&x);
+ t = pragma_lex (&result);
if (t == CPP_STRING)
{
- result = x;
- if (c_lex (&x) != CPP_EOF)
- warning ("junk at end of #pragma %s", name);
+ if (pragma_lex (&x) != CPP_EOF)
+ warning (0, "junk at end of #pragma %s", name);
return result;
}
if (t == CPP_EOF && opt)
- return 0;
+ return NULL_TREE;
error ("invalid #pragma %s", name);
- return (tree)-1;
+ return error_mark_node;
}
static void
{
tree fname = parse_strconst_pragma ("interface", 1);
struct c_fileinfo *finfo;
- const char *main_filename;
+ const char *filename;
- if (fname == (tree)-1)
+ if (fname == error_mark_node)
return;
else if (fname == 0)
- main_filename = lbasename (input_filename);
+ filename = lbasename (input_filename);
else
- main_filename = TREE_STRING_POINTER (fname);
+ filename = TREE_STRING_POINTER (fname);
finfo = get_fileinfo (input_filename);
main_input_filename = input_filename;
}
- interface_only = interface_strcmp (main_filename);
-#ifdef MULTIPLE_SYMBOL_SPACES
- if (! interface_only)
-#endif
- interface_unknown = 0;
-
- finfo->interface_only = interface_only;
- finfo->interface_unknown = interface_unknown;
+ finfo->interface_only = interface_strcmp (filename);
+ /* If MULTIPLE_SYMBOL_SPACES is set, we cannot assume that we can see
+ a definition in another file. */
+ if (!MULTIPLE_SYMBOL_SPACES || !finfo->interface_only)
+ finfo->interface_unknown = 0;
}
/* Note that we have seen a #pragma implementation for the key MAIN_FILENAME.
in older compilers and it seems reasonable to allow it in the headers
themselves, too. It only needs to precede the matching #p interface.
- We don't touch interface_only or interface_unknown; the user must specify
- a matching #p interface for this to have any effect. */
+ We don't touch finfo->interface_only or finfo->interface_unknown;
+ the user must specify a matching #p interface for this to have
+ any effect. */
static void
handle_pragma_implementation (cpp_reader* dfile ATTRIBUTE_UNUSED )
{
tree fname = parse_strconst_pragma ("implementation", 1);
- const char *main_filename;
+ const char *filename;
struct impl_files *ifiles = impl_file_chain;
- if (fname == (tree)-1)
+ if (fname == error_mark_node)
return;
if (fname == 0)
{
if (main_input_filename)
- main_filename = main_input_filename;
+ filename = main_input_filename;
else
- main_filename = input_filename;
- main_filename = lbasename (main_filename);
+ filename = input_filename;
+ filename = lbasename (filename);
}
else
{
- main_filename = TREE_STRING_POINTER (fname);
- if (cpp_included (parse_in, main_filename))
- warning ("#pragma implementation for %s appears after file is included",
- main_filename);
+ filename = TREE_STRING_POINTER (fname);
+ if (cpp_included_before (parse_in, filename, input_location))
+ warning (0, "#pragma implementation for %qs appears after "
+ "file is included", filename);
}
for (; ifiles; ifiles = ifiles->next)
{
- if (! strcmp (ifiles->filename, main_filename))
+ if (! strcmp (ifiles->filename, filename))
break;
}
if (ifiles == 0)
{
- ifiles = xmalloc (sizeof (struct impl_files));
- ifiles->filename = main_filename;
+ ifiles = XNEW (struct impl_files);
+ ifiles->filename = xstrdup (filename);
ifiles->next = impl_file_chain;
impl_file_chain = ifiles;
}
/* Indicate that this file uses Java-personality exception handling. */
static void
-handle_pragma_java_exceptions (cpp_reader* dfile ATTRIBUTE_UNUSED )
+handle_pragma_java_exceptions (cpp_reader* dfile ATTRIBUTE_UNUSED)
{
tree x;
- if (c_lex (&x) != CPP_EOF)
- warning ("junk at end of #pragma GCC java_exceptions");
+ if (pragma_lex (&x) != CPP_EOF)
+ warning (0, "junk at end of #pragma GCC java_exceptions");
choose_personality_routine (lang_java);
}
if (IDENTIFIER_OPNAME_P (name))
{
if (name != ansi_opname (ERROR_MARK))
- error ("`%D' not defined", name);
+ error ("%qD not defined", name);
}
else
{
- error ("`%D' was not declared in this scope", name);
+ error ("%qD was not declared in this scope", name);
/* Prevent repeated error messages by creating a VAR_DECL with
this NAME in the innermost block scope. */
if (current_function_decl)
decl = build_decl (VAR_DECL, name, error_mark_node);
DECL_CONTEXT (decl) = current_function_decl;
push_local_binding (name, decl, 0);
+ /* Mark the variable as used so that we do not get warnings
+ about it being unused later. */
+ TREE_USED (decl) = 1;
}
}
declaration of "f" is available. Historically, G++ and most
other compilers accepted that usage since they deferred all name
lookup until instantiation time rather than doing unqualified
- name lookup at template definition time; explain to the user what
+ name lookup at template definition time; explain to the user what
is going wrong.
Note that we have the exact wording of the following message in
the manual (trouble.texi, node "Name lookup"), so they need to
be kept in synch. */
- pedwarn ("there are no arguments to `%D' that depend on a template "
- "parameter, so a declaration of `%D' must be available",
- name, name);
-
+ permerror ("there are no arguments to %qD that depend on a template "
+ "parameter, so a declaration of %qD must be available",
+ name, name);
+
if (!flag_permissive)
{
static bool hint;
if (!hint)
{
- error ("(if you use `-fpermissive', G++ will accept your code, "
- "but allowing the use of an undeclared name is "
+ inform ("(if you use %<-fpermissive%>, G++ will accept your "
+ "code, but allowing the use of an undeclared name is "
"deprecated)");
hint = true;
}
t = build_decl (code, name, type);
retrofit_lang_decl (t);
+ /* All nesting of C++ functions is lexical; there is never a "static
+ chain" in the sense of GNU C nested functions. */
+ if (code == FUNCTION_DECL)
+ DECL_NO_STATIC_CHAIN (t) = 1;
+
return t;
}
/* Add DECL_LANG_SPECIFIC info to T. Called from build_lang_decl
- and pushdecl (for functions generated by the backend). */
+ and pushdecl (for functions generated by the back end). */
void
retrofit_lang_decl (tree t)
else
size = sizeof (struct lang_decl_flags);
- ld = ggc_alloc_cleared (size);
+ ld = GGC_CNEWVAR (struct lang_decl, size);
ld->decl_flags.can_be_full = CAN_HAVE_FULL_LANG_DECL_P (t) ? 1 : 0;
ld->decl_flags.u1sel = TREE_CODE (t) == NAMESPACE_DECL ? 1 : 0;
SET_DECL_LANGUAGE (t, lang_c);
else if (current_lang_name == lang_name_java)
SET_DECL_LANGUAGE (t, lang_java);
- else abort ();
+ else
+ gcc_unreachable ();
#ifdef GATHER_STATISTICS
tree_node_counts[(int)lang_decl] += 1;
size = sizeof (struct lang_decl_flags);
else
size = sizeof (struct lang_decl);
- ld = ggc_alloc (size);
+ ld = GGC_NEWVAR (struct lang_decl, size);
memcpy (ld, DECL_LANG_SPECIFIC (node), size);
DECL_LANG_SPECIFIC (node) = ld;
size = sizeof (struct lang_type);
else
size = sizeof (struct lang_type_ptrmem);
- lt = ggc_alloc (size);
+ lt = GGC_NEWVAR (struct lang_type, size);
memcpy (lt, TYPE_LANG_SPECIFIC (node), size);
TYPE_LANG_SPECIFIC (node) = lt;
tree t = make_node (code);
/* Create lang_type structure. */
- if (IS_AGGR_TYPE_CODE (code)
+ if (RECORD_OR_UNION_CODE_P (code)
|| code == BOUND_TEMPLATE_TEMPLATE_PARM)
{
- struct lang_type *pi;
-
- pi = ggc_alloc_cleared (sizeof (struct lang_type));
+ struct lang_type *pi = GGC_CNEW (struct lang_type);
TYPE_LANG_SPECIFIC (t) = pi;
pi->u.c.h.is_lang_type_class = 1;
}
/* Set up some flags that give proper default behavior. */
- if (IS_AGGR_TYPE_CODE (code))
+ if (RECORD_OR_UNION_CODE_P (code))
{
- SET_CLASSTYPE_INTERFACE_UNKNOWN_X (t, interface_unknown);
- CLASSTYPE_INTERFACE_ONLY (t) = interface_only;
-
- /* Make sure this is laid out, for ease of use later. In the
- presence of parse errors, the normal was of assuring this
- might not ever get executed, so we lay it out *immediately*. */
- build_pointer_type (t);
-
- TYPE_BINFO (t) = make_binfo (size_zero_node, t, NULL_TREE, NULL_TREE);
+ struct c_fileinfo *finfo = get_fileinfo (input_filename);
+ SET_CLASSTYPE_INTERFACE_UNKNOWN_X (t, finfo->interface_unknown);
+ CLASSTYPE_INTERFACE_ONLY (t) = finfo->interface_only;
}
- else
- /* We use TYPE_ALIAS_SET for the CLASSTYPE_MARKED bits. But,
- TYPE_ALIAS_SET is initialized to -1 by default, so we must
- clear it here. */
- TYPE_ALIAS_SET (t) = 0;
return t;
}
tree
-make_aggr_type (enum tree_code code)
+make_class_type (enum tree_code code)
{
tree t = cxx_make_type (code);
-
- if (IS_AGGR_TYPE_CODE (code))
- SET_IS_AGGR_TYPE (t, 1);
-
+ SET_CLASS_TYPE_P (t, 1);
return t;
}
-/* Return the type-qualifier corresponding to the identifier given by
- RID. */
+/* Returns true if we are currently in the main source file, or in a
+ template instantiation started from the main source file. */
-int
-cp_type_qual_from_rid (tree rid)
+bool
+in_main_input_context (void)
{
- if (rid == ridpointers[(int) RID_CONST])
- return TYPE_QUAL_CONST;
- else if (rid == ridpointers[(int) RID_VOLATILE])
- return TYPE_QUAL_VOLATILE;
- else if (rid == ridpointers[(int) RID_RESTRICT])
- return TYPE_QUAL_RESTRICT;
-
- abort ();
- return TYPE_UNQUALIFIED;
+ struct tinst_level *tl = outermost_tinst_level();
+
+ if (tl)
+ return strcmp (main_input_filename,
+ LOCATION_FILE (tl->locus)) == 0;
+ else
+ return strcmp (main_input_filename, input_filename) == 0;
}
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