%{/* 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 "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
%defines
%locations
%pure-parser
-%error-verbose
+%define parse.error "verbose"
%name-prefix="gram_"
%expect 0
assoc assoc;
uniqstr uniqstr;
unsigned char character;
+ named_ref *named_ref;
};
/* Define the tokens together with their human representation. */
%token PERCENT_LEFT "%left"
%token PERCENT_RIGHT "%right"
%token PERCENT_NONASSOC "%nonassoc"
+%token PERCENT_PRECEDENCE "%precedence"
%token PERCENT_PREC "%prec"
%token PERCENT_DPREC "%dprec"
%token
PERCENT_CODE "%code"
- PERCENT_DEBUG "%debug"
PERCENT_DEFAULT_PREC "%default-prec"
PERCENT_DEFINE "%define"
PERCENT_DEFINES "%defines"
PERCENT_ERROR_VERBOSE "%error-verbose"
PERCENT_EXPECT "%expect"
PERCENT_EXPECT_RR "%expect-rr"
+ PERCENT_FLAG "%<flag>"
PERCENT_FILE_PREFIX "%file-prefix"
PERCENT_GLR_PARSER "%glr-parser"
PERCENT_INITIAL_ACTION "%initial-action"
PERCENT_LANGUAGE "%language"
PERCENT_LEX_PARAM "%lex-param"
- PERCENT_LOCATIONS "%locations"
PERCENT_NAME_PREFIX "%name-prefix"
PERCENT_NO_DEFAULT_PREC "%no-default-prec"
PERCENT_NO_LINES "%no-lines"
"%nondeterministic-parser"
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 PIPE "|"
%token PROLOGUE "%{...%}"
%token SEMICOLON ";"
-%token TYPE "type"
-%token TYPE_TAG_ANY "<*>"
-%token TYPE_TAG_NONE "<>"
+%token TAG "<tag>"
+%token TAG_ANY "<*>"
+%token TAG_NONE "<>"
+%token BRACKETED_ID "[identifier]"
%type <character> CHAR
%printer { fputs (char_name ($$), stderr); } CHAR
%printer { fprintf (stderr, "{\n%s\n}", $$); }
braceless content.opt "{...}" "%{...%}" EPILOGUE
-%type <uniqstr> TYPE ID ID_COLON variable
-%printer { fprintf (stderr, "<%s>", $$); } TYPE
+%type <uniqstr> TAG ID ID_COLON BRACKETED_ID PERCENT_FLAG variable
+%type <named_ref> named_ref.opt
%printer { fputs ($$, stderr); } ID variable
%printer { fprintf (stderr, "%s:", $$); } ID_COLON
+%printer { fprintf (stderr, "%%%s", $$); } PERCENT_FLAG
+%printer { fprintf (stderr, "<%s>", $$); } TAG
%type <integer> INT
%printer { fprintf (stderr, "%d", $$); } 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:
plain_code.code, @1);
code_scanner_last_string_free ();
}
-| "%debug" { debug_flag = true; }
+| "%<flag>"
+ {
+ muscle_percent_define_ensure ($1, @1, 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,
+ MUSCLE_PERCENT_DEFINE_GRAMMAR_FILE);
}
| "%defines" { defines_flag = true; }
| "%defines" STRING
defines_flag = true;
spec_defines_file = xstrdup ($2);
}
-| "%error-verbose" { error_verbose = true; }
+| "%error-verbose"
+ {
+ muscle_percent_define_insert ("parse.error", @1, "verbose",
+ MUSCLE_PERCENT_DEFINE_GRAMMAR_FILE);
+ }
| "%expect" INT { expected_sr_conflicts = $2; }
| "%expect-rr" INT { expected_rr_conflicts = $2; }
| "%file-prefix" STRING { spec_file_prefix = $2; }
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; }
| "%name-prefix" "=" STRING { spec_name_prefix = $3; } /* deprecated */
| "%no-lines" { no_lines_flag = true; }
| "%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; }
| "%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_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);
}
;
-/*----------*
- | %union. |
- *----------*/
+/*---------.
+| %union. |
+`---------*/
%token PERCENT_UNION "%union";
current_class = unknown_sym;
current_type = NULL;
}
-| "%type" TYPE symbols.1
+| "%type" TAG symbols.1
{
symbol_list *list;
tag_seen = true;
;
precedence_declaration:
- precedence_declarator type.opt symbols.1
+ precedence_declarator tag.opt symbols.prec
{
symbol_list *list;
++current_prec;
;
precedence_declarator:
- "%left" { $$ = left_assoc; }
-| "%right" { $$ = right_assoc; }
-| "%nonassoc" { $$ = non_assoc; }
+ "%left" { $$ = left_assoc; }
+| "%right" { $$ = right_assoc; }
+| "%nonassoc" { $$ = non_assoc; }
+| "%precedence" { $$ = precedence_assoc; }
;
-type.opt:
+tag.opt:
/* Nothing. */ { current_type = NULL; }
-| TYPE { current_type = $1; tag_seen = true; }
+| TAG { current_type = $1; tag_seen = true; }
+;
+
+/* Just like symbols.1 but accept INT for the sake of POSIX. */
+symbols.prec:
+ symbol.prec
+ { $$ = 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 { $$ = $1; symbol_user_token_number_set ($1, $2, @2); }
+ ;
+
/* One or more symbols to be %typed. */
symbols.1:
symbol
;
generic_symlist_item:
- symbol { $$ = symbol_list_sym_new ($1, @1); }
-| TYPE { $$ = symbol_list_type_new ($1, @1); }
-| "<*>" { $$ = symbol_list_default_tagged_new (@1); }
-| "<>" { $$ = symbol_list_default_tagless_new (@1); }
+ symbol { $$ = symbol_list_sym_new ($1, @1); }
+| TAG { $$ = symbol_list_type_new ($1, @1); }
+| "<*>" { $$ = symbol_list_default_tagged_new (@1); }
+| "<>" { $$ = symbol_list_default_tagless_new (@1); }
;
/* One token definition. */
symbol_def:
- TYPE
+ TAG
{
current_type = $1;
tag_seen = true;
;
rules:
- id_colon { current_lhs = $1; current_lhs_location = @1; } rhses.1
+ id_colon named_ref.opt { current_lhs = $1; current_lhs_location = @1;
+ current_lhs_named_ref = $2; } rhses.1
;
rhses.1:
rhs:
/* Nothing. */
- { grammar_current_rule_begin (current_lhs, current_lhs_location); }
-| rhs symbol
- { grammar_current_rule_symbol_append ($2, @2); }
-| rhs "{...}"
- { grammar_current_rule_action_append ($2, @2); }
+ { grammar_current_rule_begin (current_lhs, current_lhs_location,
+ current_lhs_named_ref); }
+| rhs symbol named_ref.opt
+ { grammar_current_rule_symbol_append ($2, @2, $3); }
+| rhs "{...}" named_ref.opt
+ { grammar_current_rule_action_append ($2, @2, $3); }
| rhs "%prec" symbol
{ grammar_current_rule_prec_set ($3, @3); }
| rhs "%dprec" INT
{ grammar_current_rule_dprec_set ($3, @3); }
-| rhs "%merge" TYPE
+| rhs "%merge" TAG
{ grammar_current_rule_merge_set ($3, @3); }
;
+named_ref.opt:
+ /* Nothing. */ { $$ = 0; }
+|
+ BRACKETED_ID { $$ = named_ref_new($1, @1); }
+;
+
-/*----------------------------*
- | variable and content.opt. |
- *---------------------------*/
+/*---------------------------.
+| variable and content.opt. |
+`---------------------------*/
+/* The STRING form of variable is deprecated and is not M4-friendly.
+ For example, M4 fails for `%define "[" "value"'. */
variable:
ID
- | STRING { $$ = uniqstr_new ($1); } /* deprecated and not M4-friendly */
- ;
+| STRING { $$ = uniqstr_new ($1); }
+;
-/* Some content or "1" by default. */
+/* Some content or empty by default. */
content.opt:
- /* Nothing. */
- {
- static char one[] = "1";
- $$ = one;
- }
+ /* Nothing. */ { $$ = ""; }
| STRING
;
-/*-------------*
- | braceless. |
- *-------------*/
+/*------------.
+| braceless. |
+`------------*/
braceless:
"{...}"
;
-/*---------------*
- | Identifiers. |
- *---------------*/
+/*--------------.
+| Identifiers. |
+`--------------*/
/* Identifiers are returned as uniqstr values by the scanner.
Depending on their use, we may need to make them genuine symbols. */
STRING
{
$$ = symbol_get (quotearg_style (c_quoting_style, $1), @1);
- symbol_class_set ($$,
- current_class == unknown_sym
- ? token_sym : current_class, @1, false);
+ symbol_class_set ($$, token_sym, @1, false);
}
;
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