%{/* 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 void gram_error (location const *, char const *);
static char const *char_name (char);
-
-/** Add a lex-param or a parse-param.
- *
- * \param type \a lex_param or \a parse_param
- * \param decl the formal argument
- * \param loc the location in the source.
- */
-static void add_param (char const *type, char *decl, location loc);
-
-
-static symbol_class current_class = unknown_sym;
-static uniqstr current_type = NULL;
-static symbol *current_lhs;
-static location current_lhs_location;
-static int current_prec = 0;
-
-#define YYTYPE_INT16 int_fast16_t
-#define YYTYPE_INT8 int_fast8_t
-#define YYTYPE_UINT16 uint_fast16_t
-#define YYTYPE_UINT8 uint_fast8_t
%}
+%code
+{
+ static int current_prec = 0;
+ static location current_lhs_location;
+ static named_ref *current_lhs_named_ref;
+ static symbol *current_lhs;
+ static symbol_class current_class = unknown_sym;
+ static uniqstr current_type = NULL;
+
+ #define YYTYPE_INT16 int_fast16_t
+ #define YYTYPE_INT8 int_fast8_t
+ #define YYTYPE_UINT16 uint_fast16_t
+ #define YYTYPE_UINT8 uint_fast8_t
+}
+
%debug
%verbose
%defines
%locations
%pure-parser
-%error-verbose
+%define parse.error "verbose"
%name-prefix="gram_"
%expect 0
%union
{
+ assoc assoc;
+ char *code;
+ char const *chars;
+ int integer;
+ named_ref *named_ref;
symbol *symbol;
symbol_list *list;
- int integer;
- char const *chars;
- char *code;
- assoc assoc;
uniqstr uniqstr;
unsigned char character;
};
%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_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"
PERCENT_NONDETERMINISTIC_PARSER
- "%nondeterministic-parser"
+ "%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_REQUIRE "%require"
PERCENT_SKELETON "%skeleton"
PERCENT_START "%start"
PERCENT_TOKEN_TABLE "%token-table"
;
%token BRACED_CODE "{...}"
+%token BRACKETED_ID "[identifier]"
%token CHAR "char"
%token EPILOGUE "epilogue"
%token EQUAL "="
%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 "<>"
%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>", $$); } TYPE
-%printer { fputs ($$, stderr); } ID variable
+%type <uniqstr> BRACKETED_ID ID ID_COLON PERCENT_FLAG TAG variable
+%printer { fputs ($$, stderr); } <uniqstr>
+%printer { fprintf (stderr, "[%s]", $$); } BRACKETED_ID
%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
+%printer { fprintf (stderr, "%d", $$); } <integer>
-%type <symbol> id id_colon symbol string_as_id
-%printer { fprintf (stderr, "%s", $$->tag); } id symbol string_as_id
+%type <symbol> id id_colon string_as_id symbol symbol.prec
+%printer { fprintf (stderr, "%s", $$->tag); } <symbol>
%printer { fprintf (stderr, "%s:", $$->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
+%type <named_ref> named_ref.opt
+
+/*---------.
+| %param. |
+`---------*/
+%code requires
+{
+# ifndef PARAM_TYPE
+# define PARAM_TYPE
+ typedef enum
+ {
+ param_none = 0,
+ param_lex = 1 << 0,
+ param_parse = 1 << 1,
+ param_both = param_lex | param_parse
+ } param_type;
+# endif
+};
+%code
+{
+ /** Add a lex-param and/or a parse-param.
+ *
+ * \param type where to push this formal argument.
+ * \param decl the formal argument. Destroyed.
+ * \param loc the location in the source.
+ */
+ static void add_param (param_type type, char *decl, location loc);
+ static param_type current_param = param_none;
+};
+%union
+{
+ param_type param;
+}
+%token <param> PERCENT_PARAM "%param";
+%printer
+{
+ switch ($$)
+ {
+#define CASE(In, Out) \
+ case param_ ## In: fputs ("%" #Out, stderr); break
+ CASE(lex, lex-param);
+ CASE(parse, parse-param);
+ CASE(both, param);
+#undef CASE
+ case param_none: aver (false); break;
+ }
+} <param>;
+
+
+ /*==========\
+ | Grammar. |
+ \==========*/
%%
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); }
-| "%lex-param" "{...}" { add_param ("lex_param", $2, @2); }
-| "%locations" { locations_flag = true; }
+| "%language" STRING { language_argmatch ($2, grammar_prio, @1); }
| "%name-prefix" STRING { spec_name_prefix = $2; }
| "%name-prefix" "=" STRING { spec_name_prefix = $3; } /* deprecated */
| "%no-lines" { no_lines_flag = true; }
| "%nondeterministic-parser" { nondeterministic_parser = 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; }
+| "%param" { current_param = $1; } params { current_param = param_none; }
| "%require" STRING { version_check (&@2, $2); }
| "%skeleton" STRING
{
skeleton_user = uniqstr_new (skeleton_build);
free (skeleton_build);
}
- skeleton_arg (skeleton_user, 1, &@1);
+ 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? */ ";"
;
+params:
+ params "{...}" { add_param (current_param, $2, @2); }
+| "{...}" { add_param (current_param, $1, @1); }
+;
+
+
+/*----------------------.
+| grammar_declaration. |
+`----------------------*/
+
grammar_declaration:
precedence_declaration
| symbol_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);
}
;
-/*----------*
- | %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";
- $$ = one;
- }
+ /* Nothing. */ { $$ = ""; }
+| ID { $$ = $1; }
| 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. */
}
-/* Add a lex-param or a parse-param (depending on TYPE) with
- declaration DECL and location LOC. */
-
static void
-add_param (char const *type, char *decl, location loc)
+add_param (param_type type, char *decl, location loc)
{
static char const alphanum[26 + 26 + 1 + 10] =
"abcdefghijklmnopqrstuvwxyz"
"ABCDEFGHIJKLMNOPQRSTUVWXYZ"
"_"
"0123456789";
+
char const *name_start = NULL;
- char *p;
-
- /* Stop on last actual character. */
- for (p = decl; p[1]; p++)
- if ((p == decl
- || ! memchr (alphanum, p[-1], sizeof alphanum))
- && memchr (alphanum, p[0], sizeof alphanum - 10))
- name_start = p;
-
- /* Strip the surrounding '{' and '}', and any blanks just inside
- the braces. */
- while (*--p == ' ' || *p == '\t')
- continue;
- p[1] = '\0';
- while (*++decl == ' ' || *decl == '\t')
- continue;
+ {
+ char *p;
+ /* Stop on last actual character. */
+ for (p = decl; p[1]; p++)
+ if ((p == decl
+ || ! memchr (alphanum, p[-1], sizeof alphanum))
+ && memchr (alphanum, p[0], sizeof alphanum - 10))
+ name_start = p;
+
+ /* Strip the surrounding '{' and '}', and any blanks just inside
+ the braces. */
+ while (*--p == ' ' || *p == '\t')
+ continue;
+ p[1] = '\0';
+ while (*++decl == ' ' || *decl == '\t')
+ continue;
+ }
if (! name_start)
complain_at (loc, _("missing identifier in parameter declaration"));
name = xmalloc (name_len + 1);
memcpy (name, name_start, name_len);
name[name_len] = '\0';
- muscle_pair_list_grow (type, decl, name);
+ if (type & param_lex)
+ muscle_pair_list_grow ("lex_param", decl, name);
+ if (type & param_parse)
+ muscle_pair_list_grow ("parse_param", decl, name);
free (name);
}
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