X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/b0f4c4eaa1da1437b18d5d8e250d666133225d8a..775673717fc9b7e5174418f7420ba21040a8e675:/src/parse-gram.y
diff --git a/src/parse-gram.y b/src/parse-gram.y
index 522540ac..532349bb 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, 2006 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,
@@ -15,22 +15,18 @@
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"
#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"
@@ -41,7 +37,7 @@
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);
@@ -49,39 +45,52 @@ 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 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_symbol;
+ static symbol_class current_class = unknown_sym;
+ static uniqstr current_type = NULL;
+
+ /** 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
-%defines
+%define parse.error "verbose"
+%define parse.lac full
%name-prefix="gram_"
%expect 0
@@ -95,12 +104,13 @@ static int current_prec = 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;
};
@@ -120,43 +130,36 @@ 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"
%token PERCENT_MERGE "%merge"
-
/*----------------------.
| Global Declarations. |
`----------------------*/
%token
PERCENT_CODE "%code"
- PERCENT_CODE_TOP "%code-top"
- 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 "%"
PERCENT_FILE_PREFIX "%file-prefix"
PERCENT_GLR_PARSER "%glr-parser"
PERCENT_INITIAL_ACTION "%initial-action"
- PERCENT_LEX_PARAM "%lex-param"
- PERCENT_LOCATIONS "%locations"
+ PERCENT_LANGUAGE "%language"
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_PROVIDES "%provides"
- PERCENT_PURE_PARSER "%pure-parser"
- PERCENT_PUSH_PARSER "%push-parser"
- PERCENT_REQUIRE "%require"
- PERCENT_REQUIRES "%requires"
+ PERCENT_REQUIRE "%require"
PERCENT_SKELETON "%skeleton"
PERCENT_START "%start"
PERCENT_TOKEN_TABLE "%token-table"
@@ -165,6 +168,8 @@ static int current_prec = 0;
;
%token BRACED_CODE "{...}"
+%token BRACED_PREDICATE "%?{...}"
+%token BRACKETED_ID "[identifier]"
%token CHAR "char"
%token EPILOGUE "epilogue"
%token EQUAL "="
@@ -174,36 +179,90 @@ static int current_prec = 0;
%token PIPE "|"
%token PROLOGUE "%{...%}"
%token SEMICOLON ";"
-%token TYPE "type"
-%token TYPE_TAG_ANY "<*>"
-%token TYPE_TAG_NONE ""
+%token TAG ""
+%token TAG_ANY "<*>"
+%token TAG_NONE "<>"
%type CHAR
%printer { fputs (char_name ($$), stderr); } CHAR
/* braceless is not to be used for rule or symbol actions, as it
- calls translate_code. */
-%type STRING "%{...%}" EPILOGUE braceless content content.opt
-%type "{...}"
+ calls code_props_plain_init. */
+%type STRING "%{...%}" EPILOGUE braceless content.opt
+%type "{...}" "%?{...}"
%printer { fputs (quotearg_style (c_quoting_style, $$), 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 ($$, stderr); } ID
+%type BRACKETED_ID ID ID_COLON PERCENT_FLAG TAG variable
+%printer { fputs ($$, stderr); }
+%printer { fprintf (stderr, "[%s]", $$); } BRACKETED_ID
%printer { fprintf (stderr, "%s:", $$); } ID_COLON
+%printer { fprintf (stderr, "%%%s", $$); } PERCENT_FLAG
+%printer { fprintf (stderr, "<%s>", $$); } TAG
%type INT
-%printer { fprintf (stderr, "%d", $$); } INT
+%printer { fprintf (stderr, "%d", $$); }
-%type id id_colon symbol string_as_id
-%printer { fprintf (stderr, "%s", $$->tag); } id symbol string_as_id
+%type id id_colon string_as_id symbol symbol.prec
+%printer { fprintf (stderr, "%s", $$->tag); }
%printer { fprintf (stderr, "%s:", $$->tag); } id_colon
%type precedence_declarator
-%type symbols.1 generic_symlist generic_symlist_item
+%type symbols.1 symbols.prec generic_symlist generic_symlist_item
+%type named_ref.opt
+
+/*---------.
+| %param. |
+`---------*/
+%code requires
+{
+# ifndef PARAM_TYPE
+# define PARAM_TYPE
+ typedef enum
+ {
+ param_none = 0,
+ param_lex = 1 << 0,
+ param_parse = 1 << 1,
+ param_both = param_lex | param_parse
+ } param_type;
+# endif
+};
+%code
+{
+ /** Add a lex-param and/or a parse-param.
+ *
+ * \param type where to push this formal argument.
+ * \param decl the formal argument. Destroyed.
+ * \param loc the location in the source.
+ */
+ static void add_param (param_type type, char *decl, location loc);
+ static param_type current_param = param_none;
+};
+%union
+{
+ param_type param;
+}
+%token PERCENT_PARAM "%param";
+%printer
+{
+ switch ($$)
+ {
+#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;
+ }
+} ;
+
+
+ /*==========\
+ | Grammar. |
+ \==========*/
%%
input:
@@ -211,9 +270,9 @@ input:
;
- /*------------------------------------.
- | Declarations: before the first %%. |
- `------------------------------------*/
+ /*------------------------------------.
+ | Declarations: before the first %%. |
+ `------------------------------------*/
prologue_declarations:
/* Nothing */
@@ -222,14 +281,40 @@ prologue_declarations:
prologue_declaration:
grammar_declaration
-| "%{...%}" { prologue_augment (translate_code ($1, @1), @1, union_seen); }
-| "%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,
+ MUSCLE_PERCENT_DEFINE_GRAMMAR_FILE);
+ }
| "%defines" { defines_flag = true; }
-| "%error-verbose" { error_verbose = true; }
+| "%defines" STRING
+ {
+ defines_flag = true;
+ spec_defines_file = xstrdup ($2);
+ }
+| "%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 = $3; }
+| "%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;
@@ -237,25 +322,62 @@ 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 ();
}
-| "%lex-param" "{...}" { add_param ("lex_param", $2, @2); }
-| "%locations" { locations_flag = true; }
-| "%name-prefix" "=" STRING { spec_name_prefix = $3; }
+| "%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 = $3; }
-| "%parse-param" "{...}" { add_param ("parse_param", $2, @2); }
-| "%pure-parser" { pure_parser = true; }
-| "%push-parser" { push_parser = true; }
+| "%nondeterministic-parser" { nondeterministic_parser = true; }
+| "%output" STRING { spec_outfile = $2; }
+| "%output" "=" STRING { spec_outfile = $3; } /* deprecated */
+| "%param" { current_param = $1; } params { current_param = param_none; }
| "%require" STRING { version_check (&@2, $2); }
-| "%skeleton" STRING { skeleton = $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; }
+| "%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
@@ -266,17 +388,15 @@ grammar_declaration:
| "%destructor" "{...}" generic_symlist
{
symbol_list *list;
- const char *action = translate_symbol_action ($2, @2);
for (list = $3; list; list = list->next)
- symbol_list_destructor_set (list, action, @2);
+ symbol_list_destructor_set (list, $2, @2);
symbol_list_free ($3);
}
| "%printer" "{...}" generic_symlist
{
symbol_list *list;
- const char *action = translate_symbol_action ($2, @2);
for (list = $3; list; list = list->next)
- symbol_list_printer_set (list, action, @2);
+ symbol_list_printer_set (list, $2, @2);
symbol_list_free ($3);
}
| "%default-prec"
@@ -287,16 +407,24 @@ grammar_declaration:
{
default_prec = false;
}
-| "%code" braceless { prologue_augment ($2, @2, true); }
-| "%code-top" braceless { prologue_augment ($2, @2, false); }
-| "%provides" braceless { muscle_code_grow ("provides", $2, @2); }
-| "%requires" braceless { muscle_code_grow ("requires", $2, @2); }
+| "%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";
@@ -306,27 +434,11 @@ union_name:
;
grammar_declaration:
- "%union" union_name "{...}"
- {
- char const *body = $3;
-
- /* Concatenate the %union bodies. If this is the first %union, make sure
- the synchronization line appears after the opening '{' so as not to
- confuse Doxygen. Otherwise, turn the previous %union's trailing '}'
- into '\n', and omit the new %union's leading '{'. */
- if (!union_seen)
- {
- muscle_grow ("stype", "{", "");
- }
- else
- {
- char *code = muscle_find ("stype");
- code[strlen (code) - 1] = '\n';
- }
- body++;
-
+ "%union" union_name braceless
+ {
union_seen = true;
- muscle_code_grow ("stype", body, @3);
+ muscle_code_grow ("stype", $3, @3);
+ code_scanner_last_string_free ();
}
;
@@ -344,42 +456,56 @@ symbol_declaration:
current_class = unknown_sym;
current_type = NULL;
}
-| "%type" TYPE symbols.1
+| "%type" TAG symbols.1
{
symbol_list *list;
tag_seen = true;
for (list = $3; list; list = list->next)
- symbol_type_set (list->content.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->content.sym, current_type, @2);
- symbol_precedence_set (list->content.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" { $$ = precedence_assoc; }
;
-type.opt:
+tag.opt:
/* Nothing. */ { current_type = NULL; }
-| TYPE { current_type = $1; tag_seen = true; }
+| TAG { current_type = $1; tag_seen = true; }
;
+/* Just like symbols.1 but accept INT for the sake of POSIX. */
+symbols.prec:
+ symbol.prec
+ { $$ = 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 { $$ = $1; symbol_user_token_number_set ($1, $2, @2); }
+ ;
+
/* One or more symbols to be %typed. */
symbols.1:
symbol
@@ -394,15 +520,15 @@ generic_symlist:
;
generic_symlist_item:
- symbol { $$ = 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); }
+| "<>" { $$ = symbol_list_default_tagless_new (@1); }
;
/* One token definition. */
symbol_def:
- TYPE
+ TAG
{
current_type = $1;
tag_seen = true;
@@ -440,9 +566,9 @@ symbol_defs.1:
;
- /*------------------------------------------.
- | The grammar section: between the two %%. |
- `------------------------------------------*/
+ /*------------------------------------------.
+ | The grammar section: between the two %%. |
+ `------------------------------------------*/
grammar:
rules_or_grammar_declaration
@@ -461,7 +587,11 @@ rules_or_grammar_declaration:
;
rules:
- id_colon { current_lhs = $1; current_lhs_location = @1; } rhses.1
+ id_colon named_ref.opt { current_lhs ($1, @1, $2); } rhses.1
+ {
+ /* Free the current lhs. */
+ current_lhs (0, @1, 0);
+ }
;
rhses.1:
@@ -472,52 +602,67 @@ rhses.1:
rhs:
/* Nothing. */
- { grammar_current_rule_begin (current_lhs, current_lhs_location); }
-| rhs symbol
- { grammar_current_rule_symbol_append ($2, @2); }
-| rhs "{...}"
- { grammar_current_rule_action_append ($2, @2); }
+ { grammar_current_rule_begin (current_lhs_symbol, current_lhs_location,
+ current_lhs_named_ref); }
+| rhs symbol named_ref.opt
+ { grammar_current_rule_symbol_append ($2, @2, $3); }
+| rhs "{...}" named_ref.opt
+ { grammar_current_rule_action_append ($2, @2, $3, false); }
+| rhs "%?{...}"
+ { grammar_current_rule_action_append ($2, @2, NULL, true); }
| rhs "%prec" symbol
{ grammar_current_rule_prec_set ($3, @3); }
| rhs "%dprec" INT
{ grammar_current_rule_dprec_set ($3, @3); }
-| rhs "%merge" TYPE
+| rhs "%merge" TAG
{ grammar_current_rule_merge_set ($3, @3); }
;
+named_ref.opt:
+ /* Nothing. */ { $$ = 0; }
+|
+ BRACKETED_ID { $$ = named_ref_new($1, @1); }
+;
-/*-----------*
- | content. |
- *-----------*/
+/*---------------------------.
+| variable and content.opt. |
+`---------------------------*/
-content:
- STRING
-| braceless
+/* The STRING form of variable is deprecated and is not M4-friendly.
+ For example, M4 fails for `%define "[" "value"'. */
+variable:
+ ID
+| STRING { $$ = uniqstr_new ($1); }
;
-/* Some content or "1" by default. */
+/* Some content or empty by default. */
content.opt:
- /* Nothing. */
- {
- static char one[] = "1";
- $$ = one;
- }
-| content
+ /* Nothing. */ { $$ = ""; }
+| ID { $$ = $1; }
+| STRING
;
+/*------------.
+| braceless. |
+`------------*/
+
braceless:
"{...}"
{
+ code_props plain_code;
$1[strlen ($1) - 1] = '\n';
- $$ = 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. */
@@ -556,8 +701,12 @@ 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 ();
}
;
@@ -580,48 +729,47 @@ 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++)
if (! equal_boundaries (rhs[i].start, rhs[i].end))
{
- loc.start = rhs[i].start;
- break;
+ 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 *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"));
@@ -631,14 +779,17 @@ add_param (char const *type, char *decl, location loc)
size_t name_len;
for (name_len = 1;
- memchr (alphanum, name_start[name_len], sizeof alphanum);
- name_len++)
- continue;
+ 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';
- 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);
}
@@ -652,8 +803,8 @@ 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);
}
}