scope.h

   1 #ifndef SCOPE_H
   2 #define SCOPE_H
   3 /*
   4  * Symbol scoping is pretty simple.
   5  *
   6  * Copyright (C) 2003 Transmeta Corp.
   7  *               2003 Linus Torvalds
   8  *
   9  * Permission is hereby granted, free of charge, to any person obtaining a copy
  10  * of this software and associated documentation files (the "Software"), to deal
  11  * in the Software without restriction, including without limitation the rights
  12  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  13  * copies of the Software, and to permit persons to whom the Software is
  14  * furnished to do so, subject to the following conditions:
  15  *
  16  * The above copyright notice and this permission notice shall be included in
  17  * all copies or substantial portions of the Software.
  18  *
  19  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  20  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  21  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  22  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  23  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  24  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  25  * THE SOFTWARE.
  26  */
  27
  28 struct symbol;
  29
  30 struct scope {
  31         struct symbol_list *symbols;    /* List of symbols in this scope */
  32         struct scope *next;
  33 };
  34
  35 extern struct scope
  36                 *block_scope,
  37                 *label_scope,
  38                 *function_scope,
  39                 *file_scope,
  40                 *global_scope;
  41
  42 static inline int toplevel(struct scope *scope)
  43 {
  44         return scope == file_scope || scope == global_scope;
  45 }
  46
  47 extern void start_file_scope(void);
  48 extern void end_file_scope(void);
  49 extern void new_file_scope(void);
  50
  51 extern void start_block_scope(void);
  52 extern void end_block_scope(void);
  53
  54 extern void start_function_scope(void);
  55 extern void end_function_scope(void);
  56
  57 extern void start_label_scope(void);
  58 extern void end_label_scope(void);
  59
  60 extern void set_current_scope(struct symbol *);
  61 extern void bind_scope(struct symbol *, struct scope *);
  62 extern void rebind_scope(struct symbol *, struct scope *);
  63
  64 extern int is_outer_scope(struct scope *);
  65 extern int is_in_scope(struct scope *outer, struct scope *inner);
  66
  67 #endif