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1 | /* Lists of symbols for Bison | |
2 | ||
3 | Copyright (C) 2002, 2005, 2006 Free Software Foundation, Inc. | |
4 | ||
5 | This file is part of Bison, the GNU Compiler Compiler. | |
6 | ||
7 | Bison 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 | Bison 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 Bison; see the file COPYING. If not, write to | |
19 | the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, | |
20 | Boston, MA 02110-1301, USA. */ | |
21 | ||
22 | #ifndef SYMLIST_H_ | |
23 | # define SYMLIST_H_ | |
24 | ||
25 | # include "location.h" | |
26 | # include "symtab.h" | |
27 | ||
28 | /* A list of symbols, used during the parsing to store the rules. */ | |
29 | typedef struct symbol_list | |
30 | { | |
31 | /* The symbol. */ | |
32 | symbol *sym; | |
33 | location location; | |
34 | ||
35 | /* If this symbol is the generated lhs for a midrule but this is the rule in | |
36 | whose rhs it appears, MIDRULE = a pointer to that midrule. */ | |
37 | struct symbol_list *midrule; | |
38 | ||
39 | /* If this symbol is the generated lhs for a midrule and this is that | |
40 | midrule, MIDRULE_PARENT_RULE = a pointer to the rule in whose rhs it | |
41 | appears, and MIDRULE_PARENT_RHS_INDEX = its rhs index (1-origin) in the | |
42 | parent rule. */ | |
43 | struct symbol_list *midrule_parent_rule; | |
44 | int midrule_parent_rhs_index; | |
45 | ||
46 | /* The action is attached to the LHS of a rule. */ | |
47 | const char *action; | |
48 | location action_location; | |
49 | ||
50 | /* Whether this symbol's value is used in the current action. */ | |
51 | bool used; | |
52 | ||
53 | /* Precedence/associativity. */ | |
54 | symbol *ruleprec; | |
55 | int dprec; | |
56 | int merger; | |
57 | location merger_declaration_location; | |
58 | ||
59 | /* The list. */ | |
60 | struct symbol_list *next; | |
61 | } symbol_list; | |
62 | ||
63 | ||
64 | /* Create a list containing SYM at LOC. */ | |
65 | symbol_list *symbol_list_new (symbol *sym, location loc); | |
66 | ||
67 | /* Print it. */ | |
68 | void symbol_list_print (const symbol_list *l, FILE *f); | |
69 | ||
70 | /* Prepend SYM at LOC to the LIST. */ | |
71 | symbol_list *symbol_list_prepend (symbol_list *l, | |
72 | symbol *sym, | |
73 | location loc); | |
74 | ||
75 | /* Free the LIST, but not the symbols it contains. */ | |
76 | void symbol_list_free (symbol_list *l); | |
77 | ||
78 | /* Return its length. */ | |
79 | int symbol_list_length (symbol_list const *l); | |
80 | ||
81 | /* Get symbol N in symbol list L. */ | |
82 | symbol_list *symbol_list_n_get (symbol_list *l, int n); | |
83 | ||
84 | /* Get the data type (alternative in the union) of the value for | |
85 | symbol N in rule RULE. */ | |
86 | uniqstr symbol_list_n_type_name_get (symbol_list *l, location loc, int n); | |
87 | ||
88 | /* The symbol N in symbol list L is USED. */ | |
89 | void symbol_list_n_used_set (symbol_list *l, int n, bool used); | |
90 | ||
91 | #endif /* !SYMLIST_H_ */ |