%{/* Bison Grammar Parser -*- C -*-
- Copyright (C) 2002, 2003, 2004, 2005, 2006 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"
static char const *char_name (char);
-static void add_param (char const *, char *, location);
+/** 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;
%locations
%pure-parser
%error-verbose
-%defines
%name-prefix="gram_"
+%expect 0
%initial-action
{
boundary_set (&@$.end, current_file, 1, 1);
}
-/* Only NUMBERS have a value. */
%union
{
symbol *symbol;
symbol_list *list;
int integer;
- char *chars;
+ 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_AFTER_HEADER "%after-header"
- PERCENT_BEFORE_HEADER "%before-header"
- PERCENT_DEBUG "%debug"
+ PERCENT_CODE "%code"
PERCENT_DEFAULT_PREC "%default-prec"
PERCENT_DEFINE "%define"
PERCENT_DEFINES "%defines"
- PERCENT_END_HEADER "%end-header"
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_REQUIRE "%require"
PERCENT_SKELETON "%skeleton"
PERCENT_START "%start"
- PERCENT_START_HEADER "%start-header"
PERCENT_TOKEN_TABLE "%token-table"
PERCENT_VERBOSE "%verbose"
PERCENT_YACC "%yacc"
%token PIPE "|"
%token PROLOGUE "%{...%}"
%token SEMICOLON ";"
-%token TYPE "type"
+%token TAG "<tag>"
+%token TAG_ANY "<*>"
+%token TAG_NONE "<>"
%type <character> CHAR
%printer { fputs (char_name ($$), stderr); } CHAR
-%type <chars> STRING string_content "{...}" PROLOGUE EPILOGUE
+/* braceless is not to be used for rule or symbol actions, as it
+ calls code_props_plain_init. */
+%type <chars> STRING "%{...%}" EPILOGUE braceless content.opt
+%type <code> "{...}"
%printer { fputs (quotearg_style (c_quoting_style, $$), stderr); }
- STRING string_content
-%printer { fprintf (stderr, "{\n%s\n}", $$); } "{...}" PROLOGUE EPILOGUE
+ STRING
+%printer { fprintf (stderr, "{\n%s\n}", $$); }
+ braceless content.opt "{...}" "%{...%}" EPILOGUE
-%type <uniqstr> TYPE ID ID_COLON
-%printer { fprintf (stderr, "<%s>", $$); } TYPE
-%printer { fputs ($$, stderr); } ID
+%type <uniqstr> TAG ID ID_COLON PERCENT_FLAG variable
+%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
+%type <list> symbols.1 symbols.prec generic_symlist generic_symlist_item
%%
input:
- declarations "%%" grammar epilogue.opt
+ prologue_declarations "%%" grammar epilogue.opt
;
| Declarations: before the first %%. |
`------------------------------------*/
-declarations:
+prologue_declarations:
/* Nothing */
-| declarations declaration
+| prologue_declarations prologue_declaration
;
-declaration:
+prologue_declaration:
grammar_declaration
-| PROLOGUE
+| "%{...%}"
{
- prologue_augment (translate_code ($1, @1), @1, union_seen);
- }
-| "%after-header" "{...}"
- {
- /* Remove the '{', and replace the '}' with '\n'. */
- $2[strlen ($2) - 1] = '\n';
- prologue_augment (translate_code ($2+1, @2), @2, true);
+ code_props plain_code;
+ code_props_plain_init (&plain_code, $1, @1);
+ code_props_translate_code (&plain_code);
+ gram_scanner_last_string_free ();
+ muscle_code_grow (union_seen ? "post_prologue" : "pre_prologue",
+ plain_code.code, @1);
+ code_scanner_last_string_free ();
}
-| "%before-header" "{...}"
+| "%<flag>"
{
- /* Remove the '{', and replace the '}' with '\n'. */
- $2[strlen ($2) - 1] = '\n';
- prologue_augment (translate_code ($2+1, @2), @2, false);
+ muscle_percent_define_insert ($1, @1, "");
}
-| "%debug" { debug_flag = true; }
-| "%define" string_content
+| "%define" variable content.opt
{
- static char one[] = "1";
- muscle_insert ($2, one);
+ muscle_percent_define_insert ($2, @2, $3);
}
-| "%define" string_content string_content { muscle_insert ($2, $3); }
-| "%defines" { defines_flag = true; }
-| "%end-header" "{...}"
+| "%defines" { defines_flag = true; }
+| "%defines" STRING
{
- /* Remove the '{', and replace the '}' with '\n'. */
- $2[strlen ($2) - 1] = '\n';
- muscle_code_grow ("end_header", translate_code ($2+1, @2), @2);
+ defines_flag = true;
+ spec_defines_file = xstrdup ($2);
}
-| "%error-verbose" { error_verbose = true; }
-| "%expect" INT { expected_sr_conflicts = $2; }
-| "%expect-rr" INT { expected_rr_conflicts = $2; }
-| "%file-prefix" "=" string_content { spec_file_prefix = $3; }
+| "%expect" INT { expected_sr_conflicts = $2; }
+| "%expect-rr" INT { expected_rr_conflicts = $2; }
+| "%file-prefix" STRING { spec_file_prefix = $2; }
+| "%file-prefix" "=" STRING { spec_file_prefix = $3; } /* deprecated */
| "%glr-parser"
{
nondeterministic_parser = true;
}
| "%initial-action" "{...}"
{
- muscle_code_grow ("initial_action", translate_symbol_action ($2, @2), @2);
- }
-| "%lex-param" "{...}" { add_param ("lex_param", $2, @2); }
-| "%locations" { locations_flag = true; }
-| "%name-prefix" "=" string_content { spec_name_prefix = $3; }
-| "%no-lines" { no_lines_flag = true; }
-| "%nondeterministic-parser" { nondeterministic_parser = true; }
-| "%output" "=" string_content { spec_outfile = $3; }
-| "%parse-param" "{...}" { add_param ("parse_param", $2, @2); }
-| "%pure-parser" { pure_parser = true; }
-| "%require" string_content { version_check (&@2, $2); }
-| "%skeleton" string_content { skeleton = $2; }
-| "%start-header" "{...}"
- {
- /* Remove the '{', and replace the '}' with '\n'. */
- $2[strlen ($2) - 1] = '\n';
- muscle_code_grow ("start_header", translate_code ($2+1, @2), @2);
- }
-| "%token-table" { token_table_flag = true; }
-| "%verbose" { report_flag = report_states; }
-| "%yacc" { yacc_flag = true; }
+ code_props action;
+ code_props_symbol_action_init (&action, $2, @2);
+ code_props_translate_code (&action);
+ gram_scanner_last_string_free ();
+ muscle_code_grow ("initial_action", action.code, @2);
+ code_scanner_last_string_free ();
+ }
+| "%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; }
+| "%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 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
+ {
+ 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; }
+| "%yacc" { yacc_flag = true; }
| /*FIXME: Err? What is this horror doing here? */ ";"
;
{
grammar_start_symbol_set ($2, @2);
}
-| "%destructor" "{...}" symbols.1
+| "%destructor" "{...}" generic_symlist
{
symbol_list *list;
- const char *action = translate_symbol_action ($2, @2);
for (list = $3; list; list = list->next)
- symbol_destructor_set (list->sym, action, @2);
+ symbol_list_destructor_set (list, $2, @2);
symbol_list_free ($3);
}
-| "%printer" "{...}" symbols.1
+| "%printer" "{...}" generic_symlist
{
symbol_list *list;
- const char *action = translate_symbol_action ($2, @2);
for (list = $3; list; list = list->next)
- symbol_printer_set (list->sym, action, @2);
+ symbol_list_printer_set (list, $2, @2);
symbol_list_free ($3);
}
| "%default-prec"
{
default_prec = false;
}
+| "%code" braceless
+ {
+ /* 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
+ {
+ muscle_percent_code_grow ($2, @2, $3, @3);
+ code_scanner_last_string_free ();
+ }
;
-/*----------*
- | %union. |
- *----------*/
+/*---------.
+| %union. |
+`---------*/
%token PERCENT_UNION "%union";
;
grammar_declaration:
- "%union" union_name "{...}"
+ "%union" union_name braceless
{
- char const *body = $3;
-
- if (union_seen)
- {
- /* Concatenate the union bodies, turning the first one's
- trailing '}' into '\n', and omitting the second one's '{'. */
- char *code = muscle_find ("stype");
- code[strlen (code) - 1] = '\n';
- body++;
- }
-
union_seen = true;
- muscle_code_grow ("stype", body, @3);
+ muscle_code_grow ("stype", $3, @3);
+ code_scanner_last_string_free ();
}
;
current_class = unknown_sym;
current_type = NULL;
}
-| "%type" TYPE symbols.1
+| "%type" TAG symbols.1
{
- tag_seen = true;
symbol_list *list;
+ tag_seen = true;
for (list = $3; list; list = list->next)
- symbol_type_set (list->sym, $2, @2);
+ symbol_type_set (list->content.sym, $2, @2);
symbol_list_free ($3);
}
;
precedence_declaration:
- precedence_declarator type.opt symbols.1
+ precedence_declarator tag.opt symbols.prec
{
symbol_list *list;
++current_prec;
for (list = $3; list; list = list->next)
{
- symbol_type_set (list->sym, current_type, @2);
- symbol_precedence_set (list->sym, current_prec, $1, @1);
+ symbol_type_set (list->content.sym, current_type, @2);
+ symbol_precedence_set (list->content.sym, current_prec, $1, @1);
}
symbol_list_free ($3);
current_type = NULL;
;
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; }
;
-/* One or more nonterminals to be %typed. */
+/* 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 { $$ = symbol_list_new ($1, @1); }
-| symbols.1 symbol { $$ = symbol_list_prepend ($1, $2, @2); }
+ symbol
+ { $$ = symbol_list_sym_new ($1, @1); }
+| symbols.1 symbol
+ { $$ = symbol_list_prepend ($1, symbol_list_sym_new ($2, @2)); }
+;
+
+generic_symlist:
+ generic_symlist_item { $$ = $1; }
+| generic_symlist generic_symlist_item { $$ = symbol_list_prepend ($1, $2); }
+;
+
+generic_symlist_item:
+ 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;
{ 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); }
;
-/*---------------*
- | Identifiers. |
- *---------------*/
+/*---------------------------.
+| variable and content.opt. |
+`---------------------------*/
+
+variable:
+ ID
+| STRING { $$ = uniqstr_new ($1); } /* deprecated and not M4-friendly */
+;
+
+/* Some content or empty by default. */
+content.opt:
+ /* Nothing. */
+ {
+ $$ = "";
+ }
+| STRING
+;
+
+
+/*------------.
+| braceless. |
+`------------*/
+
+braceless:
+ "{...}"
+ {
+ code_props plain_code;
+ $1[strlen ($1) - 1] = '\n';
+ code_props_plain_init (&plain_code, $1+1, @1);
+ code_props_translate_code (&plain_code);
+ gram_scanner_last_string_free ();
+ $$ = plain_code.code;
+ }
+;
+
+
+/*--------------.
+| Identifiers. |
+`--------------*/
/* Identifiers are returned as uniqstr values by the scanner.
Depending on their use, we may need to make them genuine symbols. */
}
;
-/* A string used for its contents. Don't quote it. */
-string_content:
- STRING
- { $$ = $1; }
-;
-
-
epilogue.opt:
/* Nothing. */
| "%%" EPILOGUE
{
- muscle_code_grow ("epilogue", translate_code ($2, @2), @2);
+ code_props plain_code;
+ code_props_plain_init (&plain_code, $2, @2);
+ code_props_translate_code (&plain_code);
gram_scanner_last_string_free ();
+ muscle_code_grow ("epilogue", plain_code.code, @2);
+ code_scanner_last_string_free ();
}
;
gram_scanner_last_string_free ();
}
+
static void
version_check (location const *loc, char const *version)
{
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