/* Declarations for C++ name lookup routines.
- Copyright (C) 2003 Free Software Foundation, Inc.
+ Copyright (C) 2003, 2004 Free Software Foundation, Inc.
Contributed by Gabriel Dos Reis <gdr@integrable-solutions.net>
This file is part of GCC.
#define NAMESPACE_STD_HT_SIZE (1 << 8)
#define GLOBAL_SCOPE_HT_SIZE (1 << 8)
-extern binding_table binding_table_new (size_t);
-extern void binding_table_free (binding_table);
-extern void binding_table_insert (binding_table, tree, tree);
-extern tree binding_table_find_anon_type (binding_table, tree);
-extern binding_entry binding_table_reverse_maybe_remap (binding_table,
- tree, tree);
extern void binding_table_remove_anonymous_types (binding_table);
extern void binding_table_foreach (binding_table, bt_foreach_proc, void *);
extern binding_entry binding_table_find (binding_table, tree);
extern void cxx_remember_type_decls (binding_table);
\f
-/* Datatype used to temporarily save C++ bindings (for implicit
- instantiations purposes and like). Implemented in decl.c. */
-typedef struct cxx_saved_binding cxx_saved_binding;
-
/* Datatype that represents binding established by a declaration between
a name and a C++ entity. */
typedef struct cxx_binding cxx_binding;
or namespace scope. */
#define LOCAL_BINDING_P(NODE) ((NODE)->is_local)
-/* Nonzero if BINDING_VALUE is from a base class of the class which is
+/* True if NODE->value is from a base class of the class which is
currently being defined. */
#define INHERITED_VALUE_BINDING_P(NODE) ((NODE)->value_is_inherited)
-/* For a binding between a name and an entity at a non-local scope,
- defines the scope where the binding is declared. (Either a class
- _TYPE node, or a NAMESPACE_DECL.). */
-#define BINDING_SCOPE(NODE) ((NODE)->scope)
-
-/* This is the declaration bound to the name. Possible values:
- variable, overloaded function, namespace, template, enumerator. */
-#define BINDING_VALUE(NODE) ((NODE)->value)
-
-/* If name is bound to a type, this is the type (struct, union, enum). */
-#define BINDING_TYPE(NODE) ((NODE)->type)
-
-/* Zero out a cxx_binding pointed to by B. */
-#define cxx_binding_clear(B) memset ((B), 0, sizeof (cxx_binding))
-
struct cxx_binding GTY(())
{
/* Link to chain together various bindings for this name. */
unsigned is_local : 1;
};
-extern cxx_binding *cxx_binding_make (tree, tree);
-extern void cxx_binding_free (cxx_binding *);
+/* Datatype used to temporarily save C++ bindings (for implicit
+ instantiations purposes and like). Implemented in decl.c. */
+typedef struct cxx_saved_binding GTY(())
+{
+ /* The name of the current binding. */
+ tree identifier;
+ /* The binding we're saving. */
+ cxx_binding *binding;
+ tree real_type_value;
+} cxx_saved_binding;
+
+DEF_VEC_GC_O(cxx_saved_binding);
+
+extern tree identifier_type_value (tree);
+extern void set_identifier_type_value (tree, tree);
+extern void pop_binding (tree, tree);
+extern tree constructor_name_full (tree);
+extern tree constructor_name (tree);
+extern bool constructor_name_p (tree, tree);
\f
+/* The kinds of scopes we recognize. */
+typedef enum scope_kind {
+ sk_block = 0, /* An ordinary block scope. This enumerator must
+ have the value zero because "cp_binding_level"
+ is initialized by using "memset" to set the
+ contents to zero, and the default scope kind
+ is "sk_block". */
+ sk_cleanup, /* A scope for (pseudo-)scope for cleanup. It is
+ peusdo in that it is transparent to name lookup
+ activities. */
+ sk_try, /* A try-block. */
+ sk_catch, /* A catch-block. */
+ sk_for, /* The scope of the variable declared in a
+ for-init-statement. */
+ sk_function_parms, /* The scope containing function parameters. */
+ sk_class, /* The scope containing the members of a class. */
+ sk_namespace, /* The scope containing the members of a
+ namespace, including the global scope. */
+ sk_template_parms, /* A scope for template parameters. */
+ sk_template_spec /* Like sk_template_parms, but for an explicit
+ specialization. Since, by definition, an
+ explicit specialization is introduced by
+ "template <>", this scope is always empty. */
+} scope_kind;
+
+typedef struct cp_class_binding GTY(())
+{
+ cxx_binding base;
+ /* The bound name. */
+ tree identifier;
+} cp_class_binding;
+
+DEF_VEC_GC_O(cp_class_binding);
+
+/* For each binding contour we allocate a binding_level structure
+ which records the names defined in that contour.
+ Contours include:
+ 0) the global one
+ 1) one for each function definition,
+ where internal declarations of the parameters appear.
+ 2) one for each compound statement,
+ to record its declarations.
+
+ The current meaning of a name can be found by searching the levels
+ from the current one out to the global one.
+
+ Off to the side, may be the class_binding_level. This exists only
+ to catch class-local declarations. It is otherwise nonexistent.
+
+ Also there may be binding levels that catch cleanups that must be
+ run when exceptions occur. Thus, to see whether a name is bound in
+ the current scope, it is not enough to look in the
+ CURRENT_BINDING_LEVEL. You should use lookup_name_current_level
+ instead. */
+
+/* Note that the information in the `names' component of the global contour
+ is duplicated in the IDENTIFIER_GLOBAL_VALUEs of all identifiers. */
+
+struct cp_binding_level GTY(())
+ {
+ /* A chain of _DECL nodes for all variables, constants, functions,
+ and typedef types. These are in the reverse of the order
+ supplied. There may be OVERLOADs on this list, too, but they
+ are wrapped in TREE_LISTs; the TREE_VALUE is the OVERLOAD. */
+ tree names;
+
+ /* Count of elements in names chain. */
+ size_t names_size;
+
+ /* A chain of NAMESPACE_DECL nodes. */
+ tree namespaces;
+
+ /* An array of static functions and variables (for namespaces only) */
+ varray_type static_decls;
+
+ /* A chain of VTABLE_DECL nodes. */
+ tree vtables;
+
+ /* A dictionary for looking up user-defined-types. */
+ binding_table type_decls;
+
+ /* A list of USING_DECL nodes. */
+ tree usings;
+
+ /* A list of used namespaces. PURPOSE is the namespace,
+ VALUE the common ancestor with this binding_level's namespace. */
+ tree using_directives;
+
+ /* For the binding level corresponding to a class, the entities
+ declared in the class or its base classes. */
+ VEC(cp_class_binding) *class_shadowed;
+
+ /* Similar to class_shadowed, but for IDENTIFIER_TYPE_VALUE, and
+ is used for all binding levels. The TREE_PURPOSE is the name of
+ the entity, the TREE_TYPE is the associated type. In addition
+ the TREE_VALUE is the IDENTIFIER_TYPE_VALUE before we entered
+ the class. */
+ tree type_shadowed;
+
+ /* A TREE_LIST. Each TREE_VALUE is the LABEL_DECL for a local
+ label in this scope. The TREE_PURPOSE is the previous value of
+ the IDENTIFIER_LABEL VALUE. */
+ tree shadowed_labels;
+
+ /* For each level (except not the global one),
+ a chain of BLOCK nodes for all the levels
+ that were entered and exited one level down. */
+ tree blocks;
+
+ /* The entity (namespace, class, function) the scope of which this
+ binding contour corresponds to. Otherwise NULL. */
+ tree this_entity;
+
+ /* The binding level which this one is contained in (inherits from). */
+ struct cp_binding_level *level_chain;
+
+ /* List of VAR_DECLS saved from a previous for statement.
+ These would be dead in ISO-conforming code, but might
+ be referenced in ARM-era code. These are stored in a
+ TREE_LIST; the TREE_VALUE is the actual declaration. */
+ tree dead_vars_from_for;
+
+ /* STATEMENT_LIST for statements in this binding contour.
+ Only used at present for SK_CLEANUP temporary bindings. */
+ tree statement_list;
+
+ /* Binding depth at which this level began. */
+ int binding_depth;
+
+ /* The kind of scope that this object represents. However, a
+ SK_TEMPLATE_SPEC scope is represented with KIND set to
+ SK_TEMPLATE_PARMS and EXPLICIT_SPEC_P set to true. */
+ ENUM_BITFIELD (scope_kind) kind : 4;
+
+ /* True if this scope is an SK_TEMPLATE_SPEC scope. This field is
+ only valid if KIND == SK_TEMPLATE_PARMS. */
+ BOOL_BITFIELD explicit_spec_p : 1;
+
+ /* true means make a BLOCK for this level regardless of all else. */
+ unsigned keep : 1;
+
+ /* Nonzero if this level can safely have additional
+ cleanup-needing variables added to it. */
+ unsigned more_cleanups_ok : 1;
+ unsigned have_cleanups : 1;
+
+ /* 22 bits left to fill a 32-bit word. */
+ };
+
+/* The binding level currently in effect. */
+
+#define current_binding_level \
+ (*(cfun && cp_function_chain->bindings \
+ ? &cp_function_chain->bindings \
+ : &scope_chain->bindings))
+
+/* The binding level of the current class, if any. */
+
+#define class_binding_level scope_chain->class_bindings
+
+/* The tree node representing the global scope. */
+extern GTY(()) tree global_namespace;
+extern GTY(()) tree global_scope_name;
+
+/* Indicates that there is a type value in some namespace, although
+ that is not necessarily in scope at the moment. */
+
+extern GTY(()) tree global_type_node;
+
/* True if SCOPE designates the global scope binding contour. */
#define global_scope_p(SCOPE) \
((SCOPE) == NAMESPACE_LEVEL (global_namespace))
-extern cxx_binding *cxx_scope_find_binding_for_name (cxx_scope *, tree);
-extern cxx_binding *binding_for_name (cxx_scope *, tree);
+extern cxx_scope *leave_scope (void);
+extern bool kept_level_p (void);
+extern int global_bindings_p (void);
+extern bool toplevel_bindings_p (void);
+extern bool namespace_bindings_p (void);
+extern bool template_parm_scope_p (void);
+extern scope_kind innermost_scope_kind (void);
+extern cxx_scope *begin_scope (scope_kind, tree);
+extern void print_binding_stack (void);
+extern void print_binding_level (cxx_scope *);
+extern void push_to_top_level (void);
+extern void pop_from_top_level (void);
+extern void pop_everything (void);
+extern void keep_next_level (bool);
+extern bool is_ancestor (tree, tree);
+extern bool push_scope (tree);
+extern void pop_scope (tree);
+extern void push_binding_level (struct cp_binding_level *);
\f
+extern void push_namespace (tree);
+extern void pop_namespace (void);
+extern void push_nested_namespace (tree);
+extern void pop_nested_namespace (tree);
+extern void pushlevel_class (void);
+extern void poplevel_class (void);
+extern tree pushdecl_with_scope (tree, cxx_scope *);
+extern tree lookup_tag (enum tree_code, tree, cxx_scope *, int);
+extern tree lookup_tag_reverse (tree, tree);
+extern tree lookup_name (tree, int);
+extern tree lookup_name_real (tree, int, int, bool, int, int);
+extern tree lookup_type_scope (tree);
extern tree namespace_binding (tree, tree);
extern void set_namespace_binding (tree, tree, tree);
+extern tree lookup_namespace_name (tree, tree);
+extern tree lookup_qualified_name (tree, tree, bool, bool);
+extern tree lookup_name_nonclass (tree);
+extern tree lookup_function_nonclass (tree, tree, bool);
+extern void push_local_binding (tree, tree, int);
+extern bool pushdecl_class_level (tree);
+extern tree pushdecl_namespace_level (tree);
+extern bool push_class_level_binding (tree, tree);
+extern void storetags (tree);
+extern tree getdecls (void);
+extern tree cp_namespace_decls (tree);
+extern void set_decl_namespace (tree, tree, bool);
+extern tree current_decl_namespace (void);
+extern void push_decl_namespace (tree);
+extern void pop_decl_namespace (void);
+extern void do_namespace_alias (tree, tree);
+extern void do_toplevel_using_decl (tree, tree, tree);
+extern void do_local_using_decl (tree, tree, tree);
+extern tree do_class_using_decl (tree);
+extern void do_using_directive (tree);
+extern tree lookup_arg_dependent (tree, tree, tree);
+extern bool is_associated_namespace (tree, tree);
+extern void parse_using_directive (tree, tree);
+extern tree innermost_non_namespace_value (tree);
+extern cxx_binding *outer_binding (tree, cxx_binding *, bool);
+
+/* Set *DECL to the (non-hidden) declaration for ID at global scope,
+ if present and return true; otherwise return false. */
+
+static inline bool
+get_global_value_if_present (tree id, tree *decl)
+{
+ tree global_value = namespace_binding (id, global_namespace);
+ if (global_value)
+ *decl = global_value;
+ return global_value != NULL;
+}
+
+/* True is the binding of IDENTIFIER at global scope names a type. */
+
+static inline bool
+is_typename_at_global_scope (tree id)
+{
+ tree global_value = namespace_binding (id, global_namespace);
+
+ return global_value && TREE_CODE (global_value) == TYPE_DECL;
+}
#endif /* GCC_CP_NAME_LOOKUP_H */
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