X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/9b8a5ce03b0b8c119913a83e65b638a25f854ceb..bfdcc3a0b273c116e01d289ce52d400f22e4da14:/src/parse-gram.y?ds=inline
diff --git a/src/parse-gram.y b/src/parse-gram.y
index 57e13de3..5f77a5bd 100644
--- a/src/parse-gram.y
+++ b/src/parse-gram.y
@@ -1,12 +1,12 @@
%{/* Bison Grammar Parser -*- C -*-
- Copyright (C) 2002, 2003, 2004, 2005 Free Software Foundation, Inc.
+ Copyright (C) 2002-2012 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,
@@ -15,30 +15,31 @@
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 "c-ctype.h"
#include "complain.h"
#include "conflicts.h"
#include "files.h"
#include "getargs.h"
#include "gram.h"
-#include "muscle_tab.h"
-#include "output.h"
+#include "muscle-tab.h"
+#include "named-ref.h"
#include "quotearg.h"
#include "reader.h"
#include "symlist.h"
-#include "strverscmp.h"
+#include "scan-gram.h"
+#include "scan-code.h"
+#include "xmemdup0.h"
#define YYLLOC_DEFAULT(Current, Rhs, N) (Current) = lloc_default (Rhs, N)
static YYLTYPE lloc_default (YYLTYPE const *, int);
#define YY_LOCATION_PRINT(File, Loc) \
- location_print (File, Loc)
+ location_print (File, Loc)
static void version_check (location const *loc, char const *version);
@@ -46,46 +47,81 @@ static void version_check (location const *loc, char const *version);
FIXME: depends on the undocumented availability of YYLLOC. */
#undef yyerror
#define yyerror(Msg) \
- gram_error (&yylloc, Msg)
+ gram_error (&yylloc, Msg)
static void gram_error (location const *, char const *);
-static void add_param (char const *, char *, location);
+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 = 0;
-symbol *current_lhs;
-location current_lhs_location;
-assoc current_assoc;
+static uniqstr current_type = NULL;
+static symbol *current_lhs_symbol;
+static location current_lhs_location;
+static named_ref *current_lhs_named_ref;
static int current_prec = 0;
+
+/** Set the new current left-hand side symbol, possibly common
+ * to several right-hand side parts of rule.
+ */
+static
+void
+current_lhs(symbol *sym, location loc, named_ref *ref)
+{
+ current_lhs_symbol = sym;
+ current_lhs_location = loc;
+ /* In order to simplify memory management, named references for lhs
+ are always assigned by deep copy into the current symbol_list
+ node. This is because a single named-ref in the grammar may
+ result in several uses when the user factors lhs between several
+ rules using "|". Therefore free the parser's original copy. */
+ free (current_lhs_named_ref);
+ current_lhs_named_ref = ref;
+}
+
+
+#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
+%define api.prefix "gram_"
+%define api.pure
+%define parse.lac full
%defines
-%locations
-%pure-parser
%error-verbose
-%defines
-%name-prefix="gram_"
+%expect 0
+%locations
+%verbose
%initial-action
{
/* Bison's grammar can initial empty locations, hence a default
location is needed. */
- @$.start.file = @$.end.file = current_file;
- @$.start.line = @$.end.line = 1;
- @$.start.column = @$.end.column = 0;
+ boundary_set (&@$.start, current_file, 1, 1);
+ boundary_set (&@$.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;
+ named_ref *named_ref;
};
/* Define the tokens together with their human representation. */
@@ -97,10 +133,8 @@ static int current_prec = 0;
%token PERCENT_NTERM "%nterm"
%token PERCENT_TYPE "%type"
-%token PERCENT_DESTRUCTOR "%destructor {...}"
-%token PERCENT_PRINTER "%printer {...}"
-
-%token PERCENT_UNION "%union {...}"
+%token PERCENT_DESTRUCTOR "%destructor"
+%token PERCENT_PRINTER "%printer"
%token PERCENT_LEFT "%left"
%token PERCENT_RIGHT "%right"
@@ -116,6 +150,7 @@ static int current_prec = 0;
`----------------------*/
%token
+ PERCENT_CODE "%code"
PERCENT_DEBUG "%debug"
PERCENT_DEFAULT_PREC "%default-prec"
PERCENT_DEFINE "%define"
@@ -125,18 +160,19 @@ static int current_prec = 0;
PERCENT_EXPECT_RR "%expect-rr"
PERCENT_FILE_PREFIX "%file-prefix"
PERCENT_GLR_PARSER "%glr-parser"
- PERCENT_INITIAL_ACTION "%initial-action {...}"
- PERCENT_LEX_PARAM "%lex-param {...}"
+ 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_PARSE_PARAM "%parse-param"
PERCENT_PURE_PARSER "%pure-parser"
- PERCENT_REQUIRE "%require"
+ PERCENT_REQUIRE "%require"
PERCENT_SKELETON "%skeleton"
PERCENT_START "%start"
PERCENT_TOKEN_TABLE "%token-table"
@@ -144,52 +180,54 @@ static int current_prec = 0;
PERCENT_YACC "%yacc"
;
-%token TYPE "type"
+%token BRACED_CODE "{...}"
+%token BRACKETED_ID "[identifier]"
+%token CHAR "char"
+%token EPILOGUE "epilogue"
%token EQUAL "="
-%token SEMICOLON ";"
-%token PIPE "|"
%token ID "identifier"
%token ID_COLON "identifier:"
%token PERCENT_PERCENT "%%"
+%token PIPE "|"
%token PROLOGUE "%{...%}"
-%token EPILOGUE "epilogue"
-%token BRACED_CODE "{...}"
-
-
-%type STRING string_content
- "%destructor {...}"
- "%initial-action {...}"
- "%lex-param {...}"
- "%parse-param {...}"
- "%printer {...}"
- "%union {...}"
- BRACED_CODE action
- PROLOGUE EPILOGUE
-%printer { fprintf (stderr, "\"%s\"", $$); }
- STRING string_content
+%token SEMICOLON ";"
+%token TYPE "type"
+%token TYPE_TAG_ANY "<*>"
+%token TYPE_TAG_NONE "<>"
+
+%type CHAR
+%printer { fputs (char_name ($$), stderr); } CHAR
+
+/* braceless is not to be used for rule or symbol actions, as it
+ calls code_props_plain_init. */
+%type STRING "%{...%}" EPILOGUE braceless content.opt
+%type "{...}"
+%printer { fputs (quotearg_style (c_quoting_style, $$), stderr); }
+ STRING
%printer { fprintf (stderr, "{\n%s\n}", $$); }
- "%destructor {...}"
- "%initial-action {...}"
- "%lex-param {...}"
- "%parse-param {...}"
- "%printer {...}"
- "%union {...}"
- BRACED_CODE action
- PROLOGUE EPILOGUE
-%type TYPE
+ braceless content.opt "{...}" "%{...%}" EPILOGUE
+
+%type BRACKETED_ID ID ID_COLON TYPE variable
+%printer { fputs ($$, stderr); }
+%printer { fprintf (stderr, "[%s]", $$); } BRACKETED_ID
+%printer { fprintf (stderr, "%s:", $$); } ID_COLON
%printer { fprintf (stderr, "<%s>", $$); } TYPE
+
%type INT
-%printer { fprintf (stderr, "%d", $$); } INT
-%type ID symbol string_as_id
-%printer { fprintf (stderr, "%s", $$->tag); } ID symbol string_as_id
-%type ID_COLON
-%printer { fprintf (stderr, "%s:", $$->tag); } ID_COLON
+%printer { fprintf (stderr, "%d", $$); }
+
+%type id id_colon string_as_id symbol symbol.prec
+%printer { fprintf (stderr, "%s", $$->tag); }
+%printer { fprintf (stderr, "%s:", $$->tag); } id_colon
+
%type precedence_declarator
-%type symbols.1
+%type symbols.1 symbols.prec generic_symlist generic_symlist_item
+%type named_ref.opt
+
%%
input:
- declarations "%%" grammar epilogue.opt
+ prologue_declarations "%%" grammar epilogue.opt
;
@@ -197,44 +235,107 @@ input:
| Declarations: before the first %%. |
`------------------------------------*/
-declarations:
+prologue_declarations:
/* Nothing */
-| declarations declaration
+| prologue_declarations prologue_declaration
;
-declaration:
+prologue_declaration:
grammar_declaration
-| PROLOGUE { prologue_augment ($1, @1); }
-| "%debug" { debug_flag = true; }
-| "%define" string_content { muscle_insert ($2, "1"); }
-| "%define" string_content string_content { muscle_insert ($2, $3); }
-| "%defines" { defines_flag = true; }
-| "%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; }
+| "%{...%}"
+ {
+ 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 ();
+ }
+| "%debug" { debug = true; }
+| "%define" variable content.opt
+ {
+ 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; }
+| "%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;
- glr_parser = true;
- }
-| "%initial-action {...}"
- {
- muscle_code_grow ("initial_action", $1, @1);
- }
-| "%lex-param {...}" { add_param ("lex_param", $1, @1); }
-| "%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", $1, @1); }
-| "%pure-parser" { pure_parser = true; }
-| "%require" string_content { version_check (&@2, $2); }
-| "%skeleton" string_content { skeleton = $2; }
-| "%token-table" { token_table_flag = true; }
-| "%verbose" { report_flag = report_states; }
-| "%yacc" { yacc_flag = true; }
+ {
+ nondeterministic_parser = true;
+ glr_parser = true;
+ }
+| "%initial-action" "{...}"
+ {
+ 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, "",
+ 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
+ {
+ char const *skeleton_user = $2;
+ if (mbschr (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)
+ {
+ memcpy (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? */ ";"
;
@@ -245,25 +346,29 @@ grammar_declaration:
{
grammar_start_symbol_set ($2, @2);
}
-| "%union {...}"
- {
- typed = true;
- MUSCLE_INSERT_INT ("stype_line", @1.start.line);
- muscle_insert ("stype", $1);
- }
-| "%destructor {...}" symbols.1
+| "%destructor" "{...}" generic_symlist
{
- symbol_list *list;
- for (list = $2; list; list = list->next)
- symbol_destructor_set (list->sym, $1, @1);
- symbol_list_free ($2);
+ code_props code;
+ code_props_symbol_action_init (&code, $2, @2);
+ code_props_translate_code (&code);
+ {
+ symbol_list *list;
+ for (list = $3; list; list = list->next)
+ symbol_list_destructor_set (list, &code);
+ symbol_list_free ($3);
+ }
}
-| "%printer {...}" symbols.1
+| "%printer" "{...}" generic_symlist
{
- symbol_list *list;
- for (list = $2; list; list = list->next)
- symbol_printer_set (list->sym, $1, list->location);
- symbol_list_free ($2);
+ code_props code;
+ code_props_symbol_action_init (&code, $2, @2);
+ code_props_translate_code (&code);
+ {
+ symbol_list *list;
+ for (list = $3; list; list = list->next)
+ symbol_list_printer_set (list, &code);
+ symbol_list_free ($3);
+ }
}
| "%default-prec"
{
@@ -273,8 +378,44 @@ 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. |
+ *----------*/
+
+%token PERCENT_UNION "%union";
+
+union_name:
+ /* Nothing. */ {}
+| ID { muscle_code_grow ("union_name", $1, @1); }
+;
+
+grammar_declaration:
+ "%union" union_name braceless
+ {
+ union_seen = true;
+ muscle_code_grow ("stype", $3, @3);
+ code_scanner_last_string_free ();
+ }
+;
+
+
+
+
symbol_declaration:
"%nterm" { current_class = nterm_sym; } symbol_defs.1
{
@@ -289,21 +430,22 @@ symbol_declaration:
| "%type" TYPE symbols.1
{
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 type.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;
@@ -318,14 +460,40 @@ precedence_declarator:
type.opt:
/* Nothing. */ { current_type = NULL; }
-| TYPE { current_type = $1; }
+| 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)); }
;
-/* 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 { $$ = symbol_list_sym_new ($1, @1); }
+| TYPE { $$ = symbol_list_type_new ($1, @1); }
+| "<*>" { $$ = symbol_list_default_tagged_new (@1); }
+| "<>" { $$ = symbol_list_default_tagless_new (@1); }
;
/* One token definition. */
@@ -333,27 +501,28 @@ symbol_def:
TYPE
{
current_type = $1;
+ tag_seen = true;
}
-| ID
+| id
{
- symbol_class_set ($1, current_class, @1);
+ symbol_class_set ($1, current_class, @1, true);
symbol_type_set ($1, current_type, @1);
}
-| ID INT
+| id INT
{
- symbol_class_set ($1, current_class, @1);
+ symbol_class_set ($1, current_class, @1, true);
symbol_type_set ($1, current_type, @1);
symbol_user_token_number_set ($1, $2, @2);
}
-| ID string_as_id
+| id string_as_id
{
- symbol_class_set ($1, current_class, @1);
+ symbol_class_set ($1, current_class, @1, true);
symbol_type_set ($1, current_type, @1);
symbol_make_alias ($1, $2, @$);
}
-| ID INT string_as_id
+| id INT string_as_id
{
- symbol_class_set ($1, current_class, @1);
+ symbol_class_set ($1, current_class, @1, true);
symbol_type_set ($1, current_type, @1);
symbol_user_token_number_set ($1, $2, @2);
symbol_make_alias ($1, $3, @$);
@@ -381,10 +550,6 @@ grammar:
rules_or_grammar_declaration:
rules
| grammar_declaration ";"
- {
- if (yacc_flag)
- complain_at (@$, _("POSIX forbids declarations in the grammar"));
- }
| error ";"
{
yyerrok;
@@ -392,22 +557,27 @@ rules_or_grammar_declaration:
;
rules:
- ID_COLON { current_lhs = $1; current_lhs_location = @1; } rhses.1
+ id_colon named_ref.opt { current_lhs ($1, @1, $2); } rhses.1
+ {
+ /* Free the current lhs. */
+ current_lhs (0, @1, 0);
+ }
;
rhses.1:
- rhs { grammar_rule_end (@1); }
-| rhses.1 "|" rhs { grammar_rule_end (@3); }
+ rhs { grammar_current_rule_end (@1); }
+| rhses.1 "|" rhs { grammar_current_rule_end (@3); }
| rhses.1 ";"
;
rhs:
/* Nothing. */
- { grammar_rule_begin (current_lhs, current_lhs_location); }
-| rhs symbol
- { grammar_current_rule_symbol_append ($2, @2); }
-| rhs action
- { grammar_current_rule_action_append ($2, @2); }
+ { grammar_current_rule_begin (current_lhs_symbol, 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
@@ -416,14 +586,75 @@ rhs:
{ grammar_current_rule_merge_set ($3, @3); }
;
-symbol:
- ID { $$ = $1; }
-| string_as_id { $$ = $1; }
+named_ref.opt:
+ /* Nothing. */ { $$ = 0; }
+|
+ BRACKETED_ID { $$ = named_ref_new($1, @1); }
+;
+
+
+/*----------------------------*
+ | 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 { $$ = uniqstr_new ($1); }
+;
+
+/* Some content or empty by default. */
+content.opt:
+ /* Nothing. */ { $$ = ""; }
+| ID { $$ = $1; }
+| STRING
;
-action:
- BRACED_CODE
- { $$ = $1; }
+
+/*-------------*
+ | 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 ();
+ $$ = plain_code.code;
+ }
+;
+
+
+/*---------------*
+ | Identifiers. |
+ *---------------*/
+
+/* Identifiers are returned as uniqstr values by the scanner.
+ Depending on their use, we may need to make them genuine symbols. */
+
+id:
+ ID
+ { $$ = symbol_from_uniqstr ($1, @1); }
+| CHAR
+ {
+ $$ = symbol_get (char_name ($1), @1);
+ symbol_class_set ($$, token_sym, @1, false);
+ symbol_user_token_number_set ($$, $1, @1);
+ }
+;
+
+id_colon:
+ ID_COLON { $$ = symbol_from_uniqstr ($1, @1); }
+;
+
+
+symbol:
+ id
+| string_as_id
;
/* A string used as an ID: quote it. */
@@ -431,23 +662,20 @@ string_as_id:
STRING
{
$$ = symbol_get (quotearg_style (c_quoting_style, $1), @1);
- symbol_class_set ($$, token_sym, @1);
+ symbol_class_set ($$, token_sym, @1, false);
}
;
-/* A string used for its contents. Don't quote it. */
-string_content:
- STRING
- { $$ = $1; }
-;
-
-
epilogue.opt:
/* Nothing. */
| "%%" EPILOGUE
{
- muscle_code_grow ("epilogue", $2, @2);
- scanner_last_string_free ();
+ 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 ();
}
;
@@ -470,7 +698,7 @@ lloc_default (YYLTYPE const *rhs, int n)
loc.start = rhs[n].end;
loc.end = rhs[n].end;
- /* Ignore empty nonterminals the start of the the right-hand side.
+ /* Ignore empty nonterminals the start of the right-hand side.
Do not bother to ignore them at the end of the right-hand side,
since empty nonterminals have the same end as their predecessors. */
for (i = 1; i <= n; i++)
@@ -507,42 +735,35 @@ add_param (char const *type, char *decl, location loc)
/* Strip the surrounding '{' and '}', and any blanks just inside
the braces. */
- while (*--p == ' ' || *p == '\t')
- continue;
+ --p;
+ while (c_isspace ((unsigned char) *p))
+ --p;
p[1] = '\0';
- while (*++decl == ' ' || *decl == '\t')
- continue;
+ ++decl;
+ while (c_isspace ((unsigned char) *decl))
+ ++decl;
if (! name_start)
complain_at (loc, _("missing identifier in parameter declaration"));
else
{
- char *name;
- size_t name_len;
-
- for (name_len = 1;
- memchr (alphanum, name_start[name_len], sizeof alphanum);
- name_len++)
- continue;
-
- name = xmalloc (name_len + 1);
- memcpy (name, name_start, name_len);
- name[name_len] = '\0';
+ char *name = xmemdup0 (name_start, strspn (name_start, alphanum));
muscle_pair_list_grow (type, decl, name);
free (name);
}
- scanner_last_string_free ();
+ gram_scanner_last_string_free ();
}
+
static void
version_check (location const *loc, char const *version)
{
if (strverscmp (version, PACKAGE_VERSION) > 0)
{
complain_at (*loc, "require bison %s, but have %s",
- version, PACKAGE_VERSION);
- exit (63);
+ version, PACKAGE_VERSION);
+ exit (EX_MISMATCH);
}
}
@@ -557,3 +778,16 @@ token_name (int type)
{
return yytname[YYTRANSLATE (type)];
}
+
+static char const *
+char_name (char c)
+{
+ if (c == '\'')
+ return "'\\''";
+ else
+ {
+ char buf[4];
+ buf[0] = '\''; buf[1] = c; buf[2] = '\''; buf[3] = '\0';
+ return quotearg_style (escape_quoting_style, buf);
+ }
+}