X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/2ce4ed68c9b156fd353ada1a986bb61dfa42f60a..bc0f573730251da15be0e545f393d589538d6bfa:/src/parse-gram.y
diff --git a/src/parse-gram.y b/src/parse-gram.y
index c346b88b..e45f4bc2 100644
--- a/src/parse-gram.y
+++ b/src/parse-gram.y
@@ -1,12 +1,13 @@
%{/* 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,
@@ -15,16 +16,11 @@
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"
-#include
-
#include "complain.h"
#include "conflicts.h"
#include "files.h"
@@ -81,8 +77,8 @@ static int current_prec = 0;
%locations
%pure-parser
%error-verbose
-%defines
%name-prefix="gram_"
+%expect 0
%initial-action
{
@@ -92,13 +88,13 @@ static int current_prec = 0;
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;
@@ -119,6 +115,7 @@ static int current_prec = 0;
%token PERCENT_LEFT "%left"
%token PERCENT_RIGHT "%right"
%token PERCENT_NONASSOC "%nonassoc"
+%token PERCENT_PRECEDENCE "%precedence"
%token PERCENT_PREC "%prec"
%token PERCENT_DPREC "%dprec"
@@ -130,21 +127,18 @@ static int current_prec = 0;
`----------------------*/
%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 "%"
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"
@@ -152,11 +146,9 @@ static int current_prec = 0;
"%nondeterministic-parser"
PERCENT_OUTPUT "%output"
PERCENT_PARSE_PARAM "%parse-param"
- PERCENT_PURE_PARSER "%pure-parser"
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"
@@ -172,33 +164,37 @@ static int current_prec = 0;
%token PIPE "|"
%token PROLOGUE "%{...%}"
%token SEMICOLON ";"
-%token TYPE "type"
+%token TAG ""
+%token TAG_ANY "<*>"
+%token TAG_NONE "<>"
%type CHAR
%printer { fputs (char_name ($$), stderr); } CHAR
/* braceless is not to be used for rule or symbol actions, as it
- calls translate_code. */
-%type STRING "{...}" "%{...%}" EPILOGUE braceless content content.opt
+ calls code_props_plain_init. */
+%type STRING "%{...%}" EPILOGUE braceless content.opt
+%type "{...}"
%printer { fputs (quotearg_style (c_quoting_style, $$), stderr); }
- STRING
+ STRING
%printer { fprintf (stderr, "{\n%s\n}", $$); }
- braceless content content.opt "{...}" "%{...%}" EPILOGUE
+ braceless content.opt "{...}" "%{...%}" EPILOGUE
-%type TYPE ID ID_COLON
-%printer { fprintf (stderr, "<%s>", $$); } TYPE
-%printer { fputs ($$, stderr); } ID
+%type TAG ID ID_COLON PERCENT_FLAG variable
+%printer { fputs ($$, stderr); } ID variable
%printer { fprintf (stderr, "%s:", $$); } ID_COLON
+%printer { fprintf (stderr, "%%%s", $$); } PERCENT_FLAG
+%printer { fprintf (stderr, "<%s>", $$); } TAG
%type INT
%printer { fprintf (stderr, "%d", $$); } 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
+%type symbols.1 symbols.prec generic_symlist generic_symlist_item
%%
input:
@@ -217,17 +213,34 @@ prologue_declarations:
prologue_declaration:
grammar_declaration
-| "%{...%}" { prologue_augment (translate_code ($1, @1), @1, union_seen); }
-| "%after-header" braceless { prologue_augment ($2, @2, true); }
-| "%before-header" braceless { prologue_augment ($2, @2, false); }
-| "%debug" { debug_flag = true; }
-| "%define" STRING content.opt { muscle_insert ($2, $3); }
+| "%{...%}"
+ {
+ 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 ();
+ }
+| "%"
+ {
+ muscle_percent_define_ensure ($1, @1, true);
+ }
+| "%define" variable content.opt
+ {
+ muscle_percent_define_insert ($2, @2, $3);
+ }
| "%defines" { defines_flag = true; }
-| "%end-header" braceless { muscle_code_grow ("end_header", $2, @2); }
-| "%error-verbose" { error_verbose = true; }
+| "%defines" STRING
+ {
+ defines_flag = true;
+ spec_defines_file = xstrdup ($2);
+ }
| "%expect" INT { expected_sr_conflicts = $2; }
| "%expect-rr" INT { expected_rr_conflicts = $2; }
-| "%file-prefix" "=" STRING { spec_file_prefix = $3; }
+| "%file-prefix" STRING { spec_file_prefix = $2; }
+| "%file-prefix" "=" STRING { spec_file_prefix = $3; } /* deprecated */
| "%glr-parser"
{
nondeterministic_parser = true;
@@ -235,21 +248,49 @@ prologue_declaration:
}
| "%initial-action" "{...}"
{
- muscle_code_grow ("initial_action", translate_symbol_action ($2, @2), @2);
+ 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 = $3; }
+| "%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 = $3; }
+| "%output" STRING { spec_outfile = $2; }
+| "%output" "=" STRING { spec_outfile = $3; } /* deprecated */
| "%parse-param" "{...}" { add_param ("parse_param", $2, @2); }
-| "%pure-parser" { pure_parser = true; }
| "%require" STRING { version_check (&@2, $2); }
-| "%skeleton" STRING { skeleton = $2; }
-| "%start-header" braceless { muscle_code_grow ("start_header", $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; }
+| "%verbose" { report_flag |= report_states; }
| "%yacc" { yacc_flag = true; }
| /*FIXME: Err? What is this horror doing here? */ ";"
;
@@ -261,20 +302,18 @@ grammar_declaration:
{
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"
@@ -285,12 +324,24 @@ grammar_declaration:
{
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";
@@ -300,21 +351,11 @@ union_name:
;
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 ();
}
;
@@ -332,25 +373,25 @@ symbol_declaration:
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;
@@ -358,25 +399,53 @@ precedence_declaration:
;
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
+ { $$ = symbol_list_prepend ($1, symbol_list_sym_new ($2, @2)); }
;
-/* One or more nonterminals to be %typed. */
+symbol.prec:
+ symbol { $$ = $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); }
+| "<>" { $$ = symbol_list_default_tagless_new (@1); }
;
/* One token definition. */
symbol_def:
- TYPE
+ TAG
{
current_type = $1;
tag_seen = true;
@@ -455,43 +524,50 @@ rhs:
{ grammar_current_rule_prec_set ($3, @3); }
| rhs "%dprec" INT
{ grammar_current_rule_dprec_set ($3, @3); }
-| rhs "%merge" TYPE
+| rhs "%merge" TAG
{ grammar_current_rule_merge_set ($3, @3); }
;
-/*-----------*
- | content. |
- *-----------*/
+/*---------------------------.
+| variable and content.opt. |
+`---------------------------*/
-content:
- STRING
-| braceless
+variable:
+ ID
+| STRING { $$ = 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";
- $$ = one;
+ $$ = "";
}
-| content
+| STRING
;
+/*------------.
+| braceless. |
+`------------*/
+
braceless:
"{...}"
{
+ code_props plain_code;
$1[strlen ($1) - 1] = '\n';
- $$ = translate_code ($1 + 1, @1);
+ code_props_plain_init (&plain_code, $1+1, @1);
+ code_props_translate_code (&plain_code);
+ gram_scanner_last_string_free ();
+ $$ = plain_code.code;
}
;
-/*---------------*
- | Identifiers. |
- *---------------*/
+/*--------------.
+| Identifiers. |
+`--------------*/
/* Identifiers are returned as uniqstr values by the scanner.
Depending on their use, we may need to make them genuine symbols. */
@@ -530,8 +606,12 @@ 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 ();
}
;