-/* Bison Grammar Parser -*- C -*-
- Copyright (C) 2002 Free Software Foundation, Inc.
+%{/* Bison Grammar Parser -*- C -*-
+
+ 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,
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., 59 Temple Place, Suite 330, Boston, MA
- 02111-1307 USA
-*/
-
-
-%debug
-%defines
-%locations
-%pure-parser
-// %error-verbose
-%defines
-%name-prefix="gram_"
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
-%{
+#include <config.h>
#include "system.h"
+
#include "complain.h"
-#include "muscle_tab.h"
+#include "conflicts.h"
#include "files.h"
#include "getargs.h"
-#include "output.h"
-#include "symlist.h"
#include "gram.h"
+#include "muscle-tab.h"
+#include "named-ref.h"
+#include "quotearg.h"
#include "reader.h"
-#include "conflicts.h"
+#include "symlist.h"
+#include "scan-gram.h"
+#include "scan-code.h"
+
+#define YYLLOC_DEFAULT(Current, Rhs, N) (Current) = lloc_default (Rhs, N)
+static YYLTYPE lloc_default (YYLTYPE const *, int);
-/* Produce verbose syntax errors. */
-#define YYERROR_VERBOSE 1
-#define YYLLOC_DEFAULT(Current, Rhs, N) \
-do { \
- if (N) \
- { \
- Current.first_column = Rhs[1].first_column; \
- Current.first_line = Rhs[1].first_line; \
- Current.last_column = Rhs[N].last_column; \
- Current.last_line = Rhs[N].last_line; \
- } \
- else \
- { \
- Current = Rhs[0]; \
- } \
-} while (0)
+#define YY_LOCATION_PRINT(File, Loc) \
+ location_print (File, Loc)
+
+static void version_check (location const *loc, char const *version);
/* Request detailed syntax error messages, and pass them to GRAM_ERROR.
FIXME: depends on the undocumented availability of YYLLOC. */
#undef yyerror
#define yyerror(Msg) \
- gram_error (&yylloc, Msg)
-static void gram_error (location_t const *, char const *);
-
-#define YYPRINT(File, Type, Value) \
- print_token_value (File, Type, &Value)
-static void print_token_value (FILE *, int, YYSTYPE const *);
-
-static void add_param (char const *, char const *, location_t);
-
-symbol_class current_class = unknown_sym;
-struniq_t current_type = 0;
-symbol_t *current_lhs;
-location_t current_lhs_location;
-assoc_t current_assoc;
-int current_prec = 0;
-braced_code_t current_braced_code = action_braced_code;
+ gram_error (&yylloc, Msg)
+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_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
+%defines
+%locations
+%pure-parser
+%error-verbose
+%define parse.lac full
+%name-prefix="gram_"
+%expect 0
+
+%initial-action
+{
+ /* Bison's grammar can initial empty locations, hence a default
+ location is needed. */
+ boundary_set (&@$.start, current_file, 1, 1);
+ boundary_set (&@$.end, current_file, 1, 1);
+}
-/* Only NUMBERS have a value. */
%union
{
- symbol_t *symbol;
- symbol_list_t *list;
+ symbol *symbol;
+ symbol_list *list;
int integer;
- char *string;
- assoc_t assoc;
- struniq_t struniq;
+ char const *chars;
+ char *code;
+ assoc assoc;
+ uniqstr uniqstr;
+ unsigned char character;
+ named_ref *named_ref;
};
/* Define the tokens together with their human representation. */
%token PERCENT_DESTRUCTOR "%destructor"
%token PERCENT_PRINTER "%printer"
-%token PERCENT_UNION "%union"
-
%token PERCENT_LEFT "%left"
%token PERCENT_RIGHT "%right"
%token PERCENT_NONASSOC "%nonassoc"
`----------------------*/
%token
- PERCENT_DEBUG "%debug"
- PERCENT_DEFINE "%define"
- PERCENT_DEFINES "%defines"
- PERCENT_ERROR_VERBOSE "%error-verbose"
- PERCENT_EXPECT "%expect"
- PERCENT_FILE_PREFIX "%file-prefix"
- PERCENT_GLR_PARSER "%glr-parser"
- PERCENT_LEX_PARAM "%lex-param"
- PERCENT_LOCATIONS "%locations"
- PERCENT_NAME_PREFIX "%name-prefix"
- PERCENT_NO_LINES "%no-lines"
- PERCENT_OUTPUT "%output"
- PERCENT_PARSE_PARAM "%parse-param"
- PERCENT_PURE_PARSER "%pure-parser"
- PERCENT_SKELETON "%skeleton"
- PERCENT_START "%start"
- PERCENT_TOKEN_TABLE "%token-table"
- PERCENT_VERBOSE "%verbose"
- PERCENT_YACC "%yacc"
+ 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_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"
+ PERCENT_OUTPUT "%output"
+ PERCENT_PARSE_PARAM "%parse-param"
+ PERCENT_PURE_PARSER "%pure-parser"
+ PERCENT_REQUIRE "%require"
+ PERCENT_SKELETON "%skeleton"
+ PERCENT_START "%start"
+ PERCENT_TOKEN_TABLE "%token-table"
+ PERCENT_VERBOSE "%verbose"
+ PERCENT_YACC "%yacc"
;
-%token TYPE "type"
+%token BRACED_CODE "{...}"
+%token BRACKETED_ID "[identifier]"
+%token CHAR "char"
+%token EPILOGUE "epilogue"
%token EQUAL "="
-%token SEMICOLON ";"
-%token COLON ":"
-%token PIPE "|"
%token ID "identifier"
+%token ID_COLON "identifier:"
%token PERCENT_PERCENT "%%"
+%token PIPE "|"
%token PROLOGUE "%{...%}"
-%token EPILOGUE "epilogue"
-%token BRACED_CODE "{...}"
-
+%token SEMICOLON ";"
+%token TYPE "type"
+%token TYPE_TAG_ANY "<*>"
+%token TYPE_TAG_NONE "<>"
+
+%type <character> CHAR
+%printer { fputs (char_name ($$), stderr); } CHAR
+
+/* braceless is not to be used for rule or symbol actions, as it
+ calls code_props_plain_init. */
+%type <chars> STRING "%{...%}" EPILOGUE braceless content.opt
+%type <code> "{...}"
+%printer { fputs (quotearg_style (c_quoting_style, $$), stderr); }
+ STRING
+%printer { fprintf (stderr, "{\n%s\n}", $$); }
+ braceless content.opt "{...}" "%{...%}" EPILOGUE
+
+%type <uniqstr> BRACKETED_ID ID ID_COLON TYPE variable
+%printer { fputs ($$, stderr); } <uniqstr>
+%printer { fprintf (stderr, "[%s]", $$); } BRACKETED_ID
+%printer { fprintf (stderr, "%s:", $$); } ID_COLON
+%printer { fprintf (stderr, "<%s>", $$); } TYPE
-%type <string> STRING string_content
- BRACED_CODE code_content action
- PROLOGUE EPILOGUE
-%type <struniq> TYPE
%type <integer> INT
-%type <symbol> ID symbol string_as_id
+%printer { fprintf (stderr, "%d", $$); } <integer>
+
+%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
+%type <list> symbols.1 symbols.prec generic_symlist generic_symlist_item
+%type <named_ref> named_ref.opt
+
%%
input:
- declarations "%%" grammar epilogue.opt
+ prologue_declarations "%%" grammar epilogue.opt
;
| Declarations: before the first %%. |
`------------------------------------*/
-declarations:
+prologue_declarations:
/* Nothing */
-| declarations declaration semi_colon.opt
+| prologue_declarations prologue_declaration
;
-declaration:
+prologue_declaration:
grammar_declaration
-| PROLOGUE { prologue_augment ($1, @1); }
-| "%debug" { debug_flag = 1; }
-| "%define" string_content string_content { muscle_insert ($2, $3); }
-| "%defines" { defines_flag = 1; }
-| "%error-verbose" { error_verbose = 1; }
-| "%expect" INT { expected_conflicts = $2; }
-| "%file-prefix" "=" string_content { spec_file_prefix = $3; }
-| "%glr-parser" { glr_parser = 1; }
-| "%lex-param" code_content { add_param ("lex_param", $2, @2); }
-| "%locations" { locations_flag = 1; }
-| "%name-prefix" "=" string_content { spec_name_prefix = $3; }
-| "%no-lines" { no_lines_flag = 1; }
-| "%output" "=" string_content { spec_outfile = $3; }
-| "%parse-param" code_content { add_param ("parse_param", $2, @2); }
-| "%pure-parser" { pure_parser = 1; }
-| "%skeleton" string_content { skeleton = $2; }
-| "%token-table" { token_table_flag = 1; }
-| "%verbose" { report_flag = 1; }
-| "%yacc" { yacc_flag = 1; }
+| "%{...%}"
+ {
+ 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_flag = 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" "{...}"
+ {
+ 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)
+ {
+ 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_declaration:
{
grammar_start_symbol_set ($2, @2);
}
-| "%union" BRACED_CODE
+| "%destructor" "{...}" generic_symlist
+ {
+ symbol_list *list;
+ for (list = $3; list; list = list->next)
+ symbol_list_destructor_set (list, $2, @2);
+ symbol_list_free ($3);
+ }
+| "%printer" "{...}" generic_symlist
+ {
+ symbol_list *list;
+ for (list = $3; list; list = list->next)
+ symbol_list_printer_set (list, $2, @2);
+ symbol_list_free ($3);
+ }
+| "%default-prec"
+ {
+ default_prec = true;
+ }
+| "%no-default-prec"
{
- typed = 1;
- MUSCLE_INSERT_INT ("stype_line", @2.first_line);
- muscle_insert ("stype", $2);
+ default_prec = false;
}
-| "%destructor"
- { current_braced_code = destructor_braced_code; }
- BRACED_CODE symbols.1
+| "%code" braceless
{
- symbol_list_t *list;
- for (list = $4; list; list = list->next)
- symbol_destructor_set (list->sym, $3, @3);
- symbol_list_free ($4);
- current_braced_code = action_braced_code;
+ /* 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 ();
}
-| "%printer"
- { current_braced_code = printer_braced_code; }
- BRACED_CODE symbols.1
+| "%code" ID braceless
{
- symbol_list_t *list;
- for (list = $4; list; list = list->next)
- symbol_printer_set (list->sym, $3, list->location);
- symbol_list_free ($4);
- current_braced_code = action_braced_code;
+ 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
{
}
| "%type" TYPE symbols.1
{
- symbol_list_t *list;
+ 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_t *list;
+ 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;
type.opt:
/* Nothing. */ { current_type = NULL; }
-| TYPE { current_type = $1; }
+| TYPE { 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 { $$ = symbol_list_sym_new ($1, @1); }
+| TYPE { $$ = symbol_list_type_new ($1, @1); }
+| "<*>" { $$ = symbol_list_default_tagged_new (@1); }
+| "<>" { $$ = symbol_list_default_tagless_new (@1); }
;
/* One token definition. */
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, $3, @$);
/* One or more symbol definitions. */
symbol_defs.1:
symbol_def
- {;}
| symbol_defs.1 symbol_def
- {;}
;
;
/* As a Bison extension, one can use the grammar declarations in the
- body of the grammar. But to remain LALR(1), they must be ended
- with a semi-colon. */
+ body of the grammar. */
rules_or_grammar_declaration:
rules
| grammar_declaration ";"
- {
- if (yacc_flag)
- complain_at (@$, _("POSIX forbids declarations in the grammar"));
- }
| error ";"
{
yyerrok;
;
rules:
- ID ":" { 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
{ 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); }
;
-action:
- BRACED_CODE
- { $$ = $1; }
+
+/*----------------------------*
+ | variable and content.opt. |
+ *---------------------------*/
+
+/* The STRING form of variable is deprecated and is not M4-friendly.
+ For example, M4 fails for `%define "[" "value"'. */
+variable:
+ ID
+| STRING { $$ = uniqstr_new ($1); }
;
-/* A string used as an ID: we have to keep the quotes. */
-string_as_id:
- STRING
+/* Some content or empty by default. */
+content.opt:
+ /* Nothing. */ { $$ = ""; }
+| ID { $$ = $1; }
+| STRING
+;
+
+
+/*-------------*
+ | braceless. |
+ *-------------*/
+
+braceless:
+ "{...}"
{
- $$ = symbol_get ($1, @1);
- symbol_class_set ($$, token_sym, @1);
+ 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 ();
+ $$ = plain_code.code;
}
;
-/* A string used for its contents. Strip the quotes. */
-string_content:
- STRING
- {
- $$ = $1 + 1;
- $$[strlen ($$) - 1] = '\0';
- };
+/*---------------*
+ | Identifiers. |
+ *---------------*/
+
+/* Identifiers are returned as uniqstr values by the scanner.
+ Depending on their use, we may need to make them genuine symbols. */
-/* A BRACED_CODE used for its contents. Strip the braces. */
-code_content:
- BRACED_CODE
+id:
+ ID
+ { $$ = symbol_from_uniqstr ($1, @1); }
+| CHAR
{
- $$ = $1 + 1;
- $$[strlen ($$) - 1] = '\0';
- };
+ $$ = symbol_get (char_name ($1), @1);
+ symbol_class_set ($$, 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. */
+string_as_id:
+ STRING
+ {
+ $$ = symbol_get (quotearg_style (c_quoting_style, $1), @1);
+ symbol_class_set ($$, token_sym, @1, false);
+ }
+;
epilogue.opt:
/* Nothing. */
| "%%" EPILOGUE
{
- epilogue_augment ($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 ();
}
;
-semi_colon.opt:
- /* Nothing. */
-| ";"
-;
%%
+
+
+/* Return the location of the left-hand side of a rule whose
+ right-hand side is RHS[1] ... RHS[N]. Ignore empty nonterminals in
+ the right-hand side, and return an empty location equal to the end
+ boundary of RHS[0] if the right-hand side is empty. */
+
+static YYLTYPE
+lloc_default (YYLTYPE const *rhs, int n)
+{
+ int i;
+ YYLTYPE loc;
+
+ /* SGI MIPSpro 7.4.1m miscompiles "loc.start = loc.end = rhs[n].end;".
+ The bug is fixed in 7.4.2m, but play it safe for now. */
+ loc.start = rhs[n].end;
+ loc.end = rhs[n].end;
+
+ /* Ignore empty nonterminals the start of the 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++)
+ if (! equal_boundaries (rhs[i].start, rhs[i].end))
+ {
+ loc.start = rhs[i].start;
+ break;
+ }
+
+ return loc;
+}
+
+
+/* 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 const *decl, location_t loc)
+add_param (char const *type, char *decl, location loc)
{
- static char const alphanum[] =
- "0123456789"
+ static char const alphanum[26 + 26 + 1 + 10] =
"abcdefghijklmnopqrstuvwxyz"
"ABCDEFGHIJKLMNOPQRSTUVWXYZ"
- "_";
- char const *alpha = alphanum + 10;
+ "_"
+ "0123456789";
char const *name_start = NULL;
- char const *p;
+ char *p;
- for (p = decl; *p; p++)
- if ((p == decl || ! strchr (alphanum, p[-1])) && strchr (alpha, p[0]))
+ /* 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"));
else
size_t name_len;
for (name_len = 1;
- name_start[name_len] && strchr (alphanum, name_start[name_len]);
+ memchr (alphanum, name_start[name_len], sizeof alphanum);
name_len++)
continue;
free (name);
}
- scanner_last_string_free ();
+ gram_scanner_last_string_free ();
}
-/*------------------------------------------------------------------.
-| When debugging the parser, display tokens' locations and values. |
-`------------------------------------------------------------------*/
static void
-print_token_value (FILE *file, int type, YYSTYPE const *value)
+version_check (location const *loc, char const *version)
{
- fputc (' ', file);
- switch (type)
+ if (strverscmp (version, PACKAGE_VERSION) > 0)
{
- case ID:
- fprintf (file, " = %s", value->symbol->tag);
- break;
-
- case INT:
- fprintf (file, " = %d", value->integer);
- break;
-
- case STRING:
- fprintf (file, " = \"%s\"", value->string);
- break;
-
- case TYPE:
- fprintf (file, " = <%s>", value->struniq);
- break;
-
- case BRACED_CODE:
- case PROLOGUE:
- case EPILOGUE:
- fprintf (file, " = {{ %s }}", value->string);
- break;
-
- default:
- fprintf (file, "unknown token type");
- break;
+ complain_at (*loc, "require bison %s, but have %s",
+ version, PACKAGE_VERSION);
+ exit (63);
}
}
static void
-gram_error (location_t const *loc, char const *msg)
+gram_error (location const *loc, char const *msg)
{
complain_at (*loc, "%s", msg);
}
+
+char const *
+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);
+ }
+}
projects / bison.git / blobdiff