X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/a4e25e1dec3b4e5ff028817eaefa9827041636c2..9ca7f077a0a5ecdd00c5945c7a7bd3cf46e23c13:/src/parse-gram.y?ds=sidebyside
diff --git a/src/parse-gram.y b/src/parse-gram.y
index 18eb1ac3..72f5eefa 100644
--- a/src/parse-gram.y
+++ b/src/parse-gram.y
@@ -1,13 +1,13 @@
%{/* Bison Grammar Parser -*- C -*-
- Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007 Free Software Foundation,
- Inc.
+ Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008 Free Software
+ Foundation, Inc.
This file is part of Bison, the GNU Compiler Compiler.
- This program is free software; you can redistribute it and/or modify
+ This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
+ the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
@@ -16,10 +16,7 @@
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
- 02110-1301 USA
-*/
+ along with this program. If not, see . */
#include
#include "system.h"
@@ -153,9 +150,6 @@ static int current_prec = 0;
PERCENT_OUTPUT "%output"
PERCENT_PARSE_PARAM "%parse-param"
PERCENT_PURE_PARSER "%pure-parser"
- PERCENT_PUSH_PARSER "%push-parser"
- PERCENT_PUSH_PULL_PARSER
- "%push-pull-parser"
PERCENT_REQUIRE "%require"
PERCENT_SKELETON "%skeleton"
PERCENT_START "%start"
@@ -198,12 +192,12 @@ static int current_prec = 0;
%type INT
%printer { fprintf (stderr, "%d", $$); } INT
-%type id id_colon symbol string_as_id
+%type id id_colon symbol symbol.prec string_as_id
%printer { fprintf (stderr, "%s", $$->tag); } id symbol string_as_id
%printer { fprintf (stderr, "%s:", $$->tag); } id_colon
%type precedence_declarator
-%type symbols.1 generic_symlist generic_symlist_item
+%type symbols.1 symbols.prec generic_symlist generic_symlist_item
%%
input:
@@ -235,17 +229,7 @@ prologue_declaration:
| "%debug" { debug_flag = true; }
| "%define" variable content.opt
{
- char const name_prefix[] = "percent_define(";
- size_t length = strlen ($2);
- char *name = xmalloc (sizeof name_prefix + length + 1);
- strcpy (name, name_prefix);
- strcpy (name + sizeof name_prefix - 1, $2);
- strcpy (name + sizeof name_prefix - 1 + length, ")");
- if (muscle_find_const (name))
- warn_at (@2, _("%s `%s' redefined"), "%define variable", $2);
- MUSCLE_INSERT_STRING (uniqstr_new (name), $3);
- free (name);
- muscle_grow_user_name_list ("percent_define_user_variables", $2, @2);
+ muscle_percent_define_insert ($2, @2, $3);
}
| "%defines" { defines_flag = true; }
| "%defines" STRING
@@ -282,13 +266,46 @@ prologue_declaration:
| "%output" STRING { spec_outfile = $2; }
| "%output" "=" STRING { spec_outfile = $3; } /* deprecated */
| "%parse-param" "{...}" { add_param ("parse_param", $2, @2); }
-| "%pure-parser" { pure_parser = true; }
-| "%push-parser" { push_parser = true; pull_parser = false; }
-| "%push-pull-parser" { push_parser = true; pull_parser = true; }
+| "%pure-parser"
+ {
+ /* %pure-parser is deprecated in favor of `%define api.pure', so use
+ `%define api.pure' in a backward-compatible manner here. First, don't
+ complain if %pure-parser is specified multiple times. */
+ if (!muscle_find_const ("percent_define(api.pure)"))
+ muscle_percent_define_insert ("api.pure", @1, "");
+ /* In all cases, use api.pure now so that the backend doesn't complain if
+ the skeleton ignores api.pure, but do warn now if there's a previous
+ conflicting definition from an actual %define. */
+ if (!muscle_percent_define_flag_if ("api.pure"))
+ muscle_percent_define_insert ("api.pure", @1, "");
+ }
| "%require" STRING { version_check (&@2, $2); }
-| "%skeleton" STRING { skeleton_arg ($2, 1, &@1); }
+| "%skeleton" STRING
+ {
+ char const *skeleton_user = $2;
+ if (strchr (skeleton_user, '/'))
+ {
+ size_t dir_length = strlen (current_file);
+ char *skeleton_build;
+ while (dir_length && current_file[dir_length - 1] != '/')
+ --dir_length;
+ while (dir_length && current_file[dir_length - 1] == '/')
+ --dir_length;
+ skeleton_build =
+ xmalloc (dir_length + 1 + strlen (skeleton_user) + 1);
+ if (dir_length > 0)
+ {
+ strncpy (skeleton_build, current_file, dir_length);
+ skeleton_build[dir_length++] = '/';
+ }
+ strcpy (skeleton_build + dir_length, skeleton_user);
+ skeleton_user = uniqstr_new (skeleton_build);
+ free (skeleton_build);
+ }
+ skeleton_arg (skeleton_user, 1, &@1);
+ }
| "%token-table" { token_table_flag = true; }
-| "%verbose" { report_flag = report_states; }
+| "%verbose" { report_flag |= report_states; }
| "%yacc" { yacc_flag = true; }
| /*FIXME: Err? What is this horror doing here? */ ";"
;
@@ -324,21 +341,15 @@ grammar_declaration:
}
| "%code" braceless
{
- muscle_code_grow ("percent_code_unqualified", $2, @2);
+ /* Do not invoke muscle_percent_code_grow here since it invokes
+ muscle_user_name_list_grow. */
+ muscle_code_grow ("percent_code()", $2, @2);
code_scanner_last_string_free ();
}
| "%code" ID braceless
{
- char const name_prefix[] = "percent_code(";
- size_t length = strlen ($2);
- char *name = xmalloc (sizeof name_prefix + length + 1);
- strcpy (name, name_prefix);
- strcpy (name + sizeof name_prefix - 1, $2);
- strcpy (name + sizeof name_prefix - 1 + length, ")");
- muscle_code_grow (uniqstr_new (name), $3, @3);
- free (name);
+ muscle_percent_code_grow ($2, @2, $3, @3);
code_scanner_last_string_free ();
- muscle_grow_user_name_list ("percent_code_user_qualifiers", $2, @2);
}
;
@@ -388,7 +399,7 @@ symbol_declaration:
;
precedence_declaration:
- precedence_declarator type.opt symbols.1
+ precedence_declarator type.opt symbols.prec
{
symbol_list *list;
++current_prec;
@@ -413,6 +424,19 @@ type.opt:
| TYPE { current_type = $1; tag_seen = true; }
;
+/* Just like symbols.1 but accept INT for the sake of POSIX. */
+symbols.prec:
+ symbol.prec
+ { $$ = symbol_list_sym_new ($1, @1); }
+| symbols.prec symbol.prec
+ { $$ = symbol_list_prepend ($1, symbol_list_sym_new ($2, @2)); }
+;
+
+symbol.prec:
+ symbol { $$ = $1; }
+ | symbol INT { $$ = $1; symbol_user_token_number_set ($1, $2, @2); }
+ ;
+
/* One or more symbols to be %typed. */
symbols.1:
symbol
@@ -528,12 +552,11 @@ variable:
| STRING { $$ = uniqstr_new ($1); } /* deprecated and not M4-friendly */
;
-/* Some content or "1" by default. */
+/* Some content or empty by default. */
content.opt:
/* Nothing. */
{
- static char one[] = "1";
- $$ = one;
+ $$ = "";
}
| STRING
;