projects / bison.git / blame
| Commit | Line | Data |
|---|---|---|
| 56c47203 AD |
1 | /* Lists of symbols for Bison |
| 2 | Copyright (C) 2002 Free Software Foundation, Inc. | |
| 3 | ||
| 4 | This file is part of Bison, the GNU Compiler Compiler. | |
| 5 | ||
| 6 | Bison is free software; you can redistribute it and/or modify | |
| 7 | it under the terms of the GNU General Public License as published by | |
| 8 | the Free Software Foundation; either version 2, or (at your option) | |
| 9 | any later version. | |
| 10 | ||
| 11 | Bison is distributed in the hope that it will be useful, | |
| 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 14 | GNU General Public License for more details. | |
| 15 | ||
| 16 | You should have received a copy of the GNU General Public License | |
| 17 | along with Bison; see the file COPYING. If not, write to | |
| 18 | the Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
| 19 | Boston, MA 02111-1307, USA. */ | |
| 20 | ||
| 21 | #include "system.h" | |
| 9280d3ef | 22 | #include "complain.h" |
| 56c47203 AD |
23 | #include "symlist.h" |
| 24 | ||
| 25 | ||
| 26 | /*----------------------------------------------. | |
| 27 | | Create a list containing SYMBOL at LOCATION. | | |
| 28 | `----------------------------------------------*/ | |
| 29 | ||
| 30 | symbol_list_t * | |
| 31 | symbol_list_new (symbol_t *sym, location_t location) | |
| 32 | { | |
| 33 | symbol_list_t *res = XMALLOC (symbol_list_t, 1); | |
| 34 | res->next = NULL; | |
| 35 | res->sym = sym; | |
| 36 | res->location = location; | |
| 37 | res->action = NULL; | |
| 38 | res->ruleprec = NULL; | |
| 676385e2 PH |
39 | res->dprec = 0; |
| 40 | res->merger = 0; | |
| 56c47203 AD |
41 | return res; |
| 42 | } | |
| 43 | ||
| 44 | ||
| 45 | /*-----------------------------------------. | |
| 46 | | Prepend SYMBOL at LOCATION to the LIST. | | |
| 47 | `-----------------------------------------*/ | |
| 48 | ||
| 49 | symbol_list_t * | |
| 50 | symbol_list_prepend (symbol_list_t *list, | |
| 51 | symbol_t *symbol, location_t location) | |
| 52 | { | |
| 53 | symbol_list_t *res = symbol_list_new (symbol, location); | |
| 54 | res->next = list; | |
| 55 | return res; | |
| 56 | } | |
| 57 | ||
| 58 | ||
| 59 | /*-------------------------------------------------. | |
| 60 | | Free the LIST, but not the symbols it contains. | | |
| 61 | `-------------------------------------------------*/ | |
| 62 | ||
| 63 | void | |
| 64 | symbol_list_free (symbol_list_t *list) | |
| 65 | { | |
| 66 | LIST_FREE (symbol_list_t, list); | |
| 67 | } | |
| 68 | ||
| 69 | ||
| dafdc66f AD |
70 | /*--------------------. |
| 71 | | Return its length. | | |
| 72 | `--------------------*/ | |
| 73 | ||
| 74 | unsigned int | |
| 75 | symbol_list_length (symbol_list_t *list) | |
| 76 | { | |
| 77 | int res = 0; | |
| 78 | for (/* Nothing. */; list; list = list->next) | |
| 79 | ++res; | |
| 80 | return res; | |
| 81 | } | |
| 82 | ||
| 83 | ||
| 56c47203 AD |
84 | /*--------------------------------------------------------------. |
| 85 | | Get the data type (alternative in the union) of the value for | | |
| 86 | | symbol N in rule RULE. | | |
| 87 | `--------------------------------------------------------------*/ | |
| 88 | ||
| 89 | char * | |
| 90 | symbol_list_n_type_name_get (symbol_list_t *rule, location_t location, int n) | |
| 91 | { | |
| 92 | int i; | |
| 93 | symbol_list_t *rp; | |
| 94 | ||
| 95 | if (n < 0) | |
| 96 | { | |
| 97 | complain_at (location, _("invalid $ value")); | |
| 98 | return NULL; | |
| 99 | } | |
| 100 | ||
| 101 | rp = rule; | |
| 102 | i = 0; | |
| 103 | ||
| 104 | while (i < n) | |
| 105 | { | |
| 106 | rp = rp->next; | |
| 107 | if (rp == NULL || rp->sym == NULL) | |
| 108 | { | |
| 109 | complain_at (location, _("invalid $ value")); | |
| 110 | return NULL; | |
| 111 | } | |
| 112 | ++i; | |
| 113 | } | |
| 114 | ||
| 115 | return rp->sym->type_name; | |
| 116 | } |