%{/* 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, 2009 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,
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 <http://www.gnu.org/licenses/>. */
#include <config.h>
#include "system.h"
-#include <strverscmp.h>
-
#include "complain.h"
#include "conflicts.h"
#include "files.h"
#include "getargs.h"
#include "gram.h"
#include "muscle_tab.h"
+#include "named-ref.h"
#include "quotearg.h"
#include "reader.h"
#include "symlist.h"
static uniqstr current_type = NULL;
static symbol *current_lhs;
static location current_lhs_location;
+static named_ref *current_lhs_named_ref;
static int current_prec = 0;
#define YYTYPE_INT16 int_fast16_t
%locations
%pure-parser
%error-verbose
-%defines
%name-prefix="gram_"
%expect 0
assoc assoc;
uniqstr uniqstr;
unsigned char character;
+ named_ref *named_ref;
};
/* Define the tokens together with their human representation. */
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"
%token TYPE "type"
%token TYPE_TAG_ANY "<*>"
%token TYPE_TAG_NONE "<>"
+%token BRACKETED_ID "[identifier]"
%type <character> CHAR
%printer { fputs (char_name ($$), stderr); } CHAR
/* braceless is not to be used for rule or symbol actions, as it
calls code_props_plain_init. */
-%type <chars> STRING "%{...%}" EPILOGUE braceless content content.opt
+%type <chars> STRING "%{...%}" EPILOGUE braceless content.opt
%type <code> "{...}"
%printer { fputs (quotearg_style (c_quoting_style, $$), stderr); }
STRING
%printer { fprintf (stderr, "{\n%s\n}", $$); }
- braceless content content.opt "{...}" "%{...%}" EPILOGUE
+ braceless content.opt "{...}" "%{...%}" EPILOGUE
-%type <uniqstr> TYPE ID ID_COLON
+%type <uniqstr> TYPE ID ID_COLON BRACKETED_ID variable
+%type <named_ref> named_ref.opt
%printer { fprintf (stderr, "<%s>", $$); } TYPE
-%printer { fputs ($$, stderr); } ID
+%printer { fputs ($$, stderr); } ID variable
%printer { fprintf (stderr, "%s:", $$); } ID_COLON
%type <integer> INT
%printer { fprintf (stderr, "%d", $$); } INT
-%type <symbol> id id_colon symbol string_as_id
+%type <symbol> 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 <assoc> precedence_declarator
-%type <list> symbols.1 generic_symlist generic_symlist_item
+%type <list> symbols.1 symbols.prec generic_symlist generic_symlist_item
%%
input:
code_props_plain_init (&plain_code, $1, @1);
code_props_translate_code (&plain_code);
gram_scanner_last_string_free ();
- prologue_augment (plain_code.code, @1, union_seen);
+ muscle_code_grow (union_seen ? "post_prologue" : "pre_prologue",
+ plain_code.code, @1);
code_scanner_last_string_free ();
}
| "%debug" { debug_flag = true; }
-| "%define" STRING content.opt { muscle_insert ($2, $3); }
+| "%define" variable content.opt
+ {
+ muscle_percent_define_insert ($2, @2, $3,
+ MUSCLE_PERCENT_DEFINE_GRAMMAR_FILE);
+ }
| "%defines" { defines_flag = true; }
| "%defines" STRING
{
muscle_code_grow ("initial_action", action.code, @2);
code_scanner_last_string_free ();
}
-| "%language" STRING { language_argmatch ($2, 1, &@1); }
+| "%language" STRING { language_argmatch ($2, grammar_prio, @1); }
| "%lex-param" "{...}" { add_param ("lex_param", $2, @2); }
| "%locations" { locations_flag = true; }
| "%name-prefix" STRING { spec_name_prefix = $2; }
| "%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, "",
+ MUSCLE_PERCENT_DEFINE_GRAMMAR_FILE);
+ /* 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, "",
+ MUSCLE_PERCENT_DEFINE_GRAMMAR_FILE);
+ }
| "%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, grammar_prio, @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? */ ";"
;
}
| "%code" braceless
{
- muscle_code_grow ("percent_code", $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" STRING braceless
+| "%code" ID braceless
{
- char const name_prefix[] = "percent_code_";
- char *name = xmalloc (sizeof name_prefix + strlen ($2));
- strcpy (name, name_prefix);
- strcpy (name + sizeof name_prefix - 1, $2);
- 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 ("used_percent_code_qualifiers", "[[[[", ",");
- muscle_grow ("used_percent_code_qualifiers", $2, "");
- muscle_grow ("used_percent_code_qualifiers", "]], [[", "");
- muscle_boundary_grow ("used_percent_code_qualifiers", @2.start);
- muscle_grow ("used_percent_code_qualifiers", "]], [[", "");
- muscle_boundary_grow ("used_percent_code_qualifiers", @2.end);
- muscle_grow ("used_percent_code_qualifiers", "]]]]", "");
}
;
;
grammar_declaration:
- "%union" union_name "{...}"
+ "%union" union_name braceless
{
- char const *body = $3;
-
- /* Concatenate the %union bodies. If this is the first %union, make sure
- the synchronization line appears after the opening '{' so as not to
- confuse Doxygen. Otherwise, turn the previous %union's trailing '}'
- into '\n', and omit the new %union's leading '{'. */
- if (!union_seen)
- {
- muscle_grow ("stype", "{", "");
- }
- else
- {
- char *code = muscle_find ("stype");
- code[strlen (code) - 1] = '\n';
- }
- body++;
-
union_seen = true;
- muscle_code_grow ("stype", body, @3);
- gram_scanner_last_string_free ();
+ muscle_code_grow ("stype", $3, @3);
+ code_scanner_last_string_free ();
}
;
;
precedence_declaration:
- precedence_declarator type.opt symbols.1
+ precedence_declarator type.opt symbols.prec
{
symbol_list *list;
++current_prec;
| 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
;
rules:
- id_colon { current_lhs = $1; current_lhs_location = @1; } rhses.1
+ id_colon named_ref.opt { current_lhs = $1; current_lhs_location = @1;
+ current_lhs_named_ref = $2; } rhses.1
;
rhses.1:
rhs:
/* Nothing. */
- { grammar_current_rule_begin (current_lhs, current_lhs_location); }
-| rhs symbol
- { grammar_current_rule_symbol_append ($2, @2); }
-| rhs "{...}"
- { grammar_current_rule_action_append ($2, @2); }
+ { grammar_current_rule_begin (current_lhs, current_lhs_location,
+ current_lhs_named_ref); }
+| rhs symbol named_ref.opt
+ { grammar_current_rule_symbol_append ($2, @2, $3); }
+| rhs "{...}" named_ref.opt
+ { grammar_current_rule_action_append ($2, @2, $3); }
| rhs "%prec" symbol
{ grammar_current_rule_prec_set ($3, @3); }
| rhs "%dprec" INT
{ grammar_current_rule_merge_set ($3, @3); }
;
+named_ref.opt:
+ /* Nothing. */ { $$ = 0; }
+|
+ BRACKETED_ID { $$ = named_ref_new($1, @1); }
+;
-/*-----------*
- | content. |
- *-----------*/
-content:
- STRING
-| braceless
+/*----------------------------*
+ | variable and content.opt. |
+ *---------------------------*/
+
+/* The STRING form of variable is deprecated and is not M4-friendly.
+ For example, M4 fails for `%define "[" "value"'. */
+variable:
+ ID
+| STRING { $$ = uniqstr_new ($1); }
;
-/* Some content or "1" by default. */
+/* Some content or empty by default. */
content.opt:
- /* Nothing. */
- {
- static char one[] = "1";
- $$ = one;
- }
-| content
+ /* Nothing. */ { $$ = ""; }
+| STRING
;
+/*-------------*
+ | braceless. |
+ *-------------*/
+
braceless:
"{...}"
{
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