gcc/cp/name-lookup.h

   1 /* Declarations for C++ name lookup routines.
   2    Copyright (C) 2003 Free Software Foundation, Inc.
   3    Contributed by Gabriel Dos Reis <gdr@integrable-solutions.net>
   4
   5 This file is part of GCC.
   6
   7 GCC is free software; you can redistribute it and/or modify
   8 it under the terms of the GNU General Public License as published by
   9 the Free Software Foundation; either version 2, or (at your option)
  10 any later version.
  11
  12 GCC is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 GNU General Public License for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with GCC; see the file COPYING.  If not, write to
  19 the Free Software Foundation, 59 Temple Place - Suite 330,
  20 Boston, MA 02111-1307, USA.  */
  21
  22 #ifndef GCC_CP_NAME_LOOKUP_H
  23 #define GCC_CP_NAME_LOOKUP_H
  24
  25 #include "c-common.h"
  26
  27 /* The type of dictionary used to map names to types declared at
  28    a given scope.  */
  29 typedef struct binding_table_s *binding_table;
  30 typedef struct binding_entry_s *binding_entry;
  31
  32 /* The type of a routine repeatedly called by binding_table_foreach.  */
  33 typedef void (*bt_foreach_proc) (binding_entry, void *);
  34
  35 struct binding_entry_s GTY(())
  36 {
  37   binding_entry chain;
  38   tree name;
  39   tree type;
  40 };
  41
  42 /* These macros indicate the initial chains count for binding_table.  */
  43 #define SCOPE_DEFAULT_HT_SIZE                        (1 << 3)
  44 #define CLASS_SCOPE_HT_SIZE                          (1 << 3)
  45 #define NAMESPACE_ORDINARY_HT_SIZE                   (1 << 5)
  46 #define NAMESPACE_STD_HT_SIZE                        (1 << 8)
  47 #define GLOBAL_SCOPE_HT_SIZE                         (1 << 8)
  48
  49 extern binding_table binding_table_new (size_t);
  50 extern void binding_table_free (binding_table);
  51 extern void binding_table_insert (binding_table, tree, tree);
  52 extern tree binding_table_find_anon_type (binding_table, tree);
  53 extern binding_entry binding_table_reverse_maybe_remap (binding_table,
  54                                                         tree, tree);
  55 extern void binding_table_remove_anonymous_types (binding_table);
  56 extern void binding_table_foreach (binding_table, bt_foreach_proc, void *);
  57 extern binding_entry binding_table_find (binding_table, tree);
  58 extern void cxx_remember_type_decls (binding_table);
  59 \f
  60 /* Datatype used to temporarily save C++ bindings (for implicit
  61    instantiations purposes and like).  Implemented in decl.c.  */
  62 typedef struct cxx_saved_binding cxx_saved_binding;
  63
  64 /* Datatype that represents binding established by a declaration between
  65    a name and a C++ entity.  */
  66 typedef struct cxx_binding cxx_binding;
  67
  68 /* The datatype used to implement C++ scope.  */
  69 typedef struct cp_binding_level cxx_scope;
  70
  71 /* Nonzero if this binding is for a local scope, as opposed to a class
  72    or namespace scope.  */
  73 #define LOCAL_BINDING_P(NODE) ((NODE)->is_local)
  74
  75 /* Nonzero if BINDING_VALUE is from a base class of the class which is
  76    currently being defined.  */
  77 #define INHERITED_VALUE_BINDING_P(NODE) ((NODE)->value_is_inherited)
  78
  79 /* For a binding between a name and an entity at a non-local scope,
  80    defines the scope where the binding is declared.  (Either a class
  81    _TYPE node, or a NAMESPACE_DECL.).  */
  82 #define BINDING_SCOPE(NODE) ((NODE)->scope)
  83
  84 /* This is the declaration bound to the name. Possible values:
  85    variable, overloaded function, namespace, template, enumerator.  */
  86 #define BINDING_VALUE(NODE) ((NODE)->value)
  87
  88 /* If name is bound to a type, this is the type (struct, union, enum).  */
  89 #define BINDING_TYPE(NODE)   ((NODE)->type)
  90
  91 /* Zero out a cxx_binding pointed to by B.  */
  92 #define cxx_binding_clear(B) memset ((B), 0, sizeof (cxx_binding))
  93
  94 struct cxx_binding GTY(())
  95 {
  96   /* Link to chain together various bindings for this name.  */
  97   cxx_binding *previous;
  98   /* The non-type entity this name is bound to.  */
  99   tree value;
 100   /* The type entity this name is bound to.  */
 101   tree type;
 102   /* The scope at which this binding was made.  */
 103   cxx_scope *scope;
 104   unsigned value_is_inherited : 1;
 105   unsigned is_local : 1;
 106 };
 107
 108 extern cxx_binding *cxx_binding_make (tree, tree);
 109 extern void cxx_binding_free (cxx_binding *);
 110 \f
 111 /* True if SCOPE designates the global scope binding contour.  */
 112 #define global_scope_p(SCOPE) \
 113   ((SCOPE) == NAMESPACE_LEVEL (global_namespace))
 114
 115 extern cxx_binding *cxx_scope_find_binding_for_name (cxx_scope *, tree);
 116 extern cxx_binding *binding_for_name (cxx_scope *, tree);
 117 \f
 118 extern tree namespace_binding (tree, tree);
 119 extern void set_namespace_binding (tree, tree, tree);
 120
 121 #endif /* GCC_CP_NAME_LOOKUP_H */