-%{/* Bison Grammar Parser -*- C -*-
+/* Bison Grammar Parser -*- C -*-
Copyright (C) 2002-2013 Free Software Foundation, Inc.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */
-#include <config.h>
-#include "system.h"
-
-#include "c-ctype.h"
-#include "complain.h"
-#include "conflicts.h"
-#include "files.h"
-#include "getargs.h"
-#include "gram.h"
-#include "named-ref.h"
-#include "quotearg.h"
-#include "reader.h"
-#include "symlist.h"
-#include "symtab.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 (Loc, File)
-
-static void version_check (location const *loc, char const *version);
-
-static void gram_error (location const *, char const *);
-
-/* A string that describes a char (e.g., 'a' -> "'a'"). */
-static char const *char_name (char);
-%}
+%code requires
+{
+ #include "symlist.h"
+ #include "symtab.h"
+}
%code
{
+ #include <config.h>
+ #include "system.h"
+
+ #include "c-ctype.h"
+ #include "complain.h"
+ #include "conflicts.h"
+ #include "files.h"
+ #include "getargs.h"
+ #include "gram.h"
+ #include "named-ref.h"
+ #include "quotearg.h"
+ #include "reader.h"
+ #include "scan-gram.h"
+ #include "scan-code.h"
+ #include "xmemdup0.h"
+
static int current_prec = 0;
static location current_lhs_location;
static named_ref *current_lhs_named_ref;
/** 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;
- }
+ static void current_lhs (symbol *sym, location loc, named_ref *ref);
+
+ #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 (Loc, File)
+
+ /* Strip initial '{' and final '}' (must be first and last characters).
+ Return the result. */
+ static char *strip_braces (char *code);
+
+ /* Convert CODE by calling code_props_plain_init if PLAIN, otherwise
+ code_props_symbol_action_init. Call
+ gram_scanner_last_string_free to release the latest string from
+ the scanner (should be CODE). */
+ static char const *translate_code (char *code, location loc, bool plain);
+
+ /* Convert CODE by calling code_props_plain_init after having
+ stripped the first and last characters (expected to be '{', and
+ '}'). Call gram_scanner_last_string_free to release the latest
+ string from the scanner (should be CODE). */
+ static char const *translate_code_braceless (char *code, location loc);
+
+ static void version_check (location const *loc, char const *version);
+
+ static void gram_error (location const *, char const *);
+
+ /* A string that describes a char (e.g., 'a' -> "'a'"). */
+ static char const *char_name (char);
#define YYTYPE_INT16 int_fast16_t
#define YYTYPE_INT8 int_fast8_t
#define YYTYPE_UINT8 uint_fast8_t
}
-%define api.prefix "gram_"
+%define api.prefix {gram_}
%define api.pure full
%define locations
%define parse.error verbose
%type <character> CHAR
%printer { fputs (char_name ($$), yyo); } CHAR
-/* braceless is not to be used for rule or symbol actions, as it
- calls code_props_plain_init. */
-%union
-{
- char *code;
- char const *chars;
-};
-%type <chars> STRING "%{...%}" EPILOGUE braceless
-%type <code> "{...}" "%?{...}"
-%printer { fputs (quotearg_style (c_quoting_style, $$), yyo); }
- STRING
-%printer { fprintf (yyo, "{\n%s\n}", $$); }
- braceless "{...}" "%{...%}" EPILOGUE
+%union {char *code;};
+%type <code> "{...}" "%?{...}" "%{...%}" EPILOGUE STRING
+%printer { fputs (quotearg_style (c_quoting_style, $$), yyo); } STRING
+%printer { fprintf (yyo, "{\n%s\n}", $$); } <code>
%union {uniqstr uniqstr;}
%type <uniqstr> BRACKETED_ID ID ID_COLON PERCENT_FLAG TAG tag variable
grammar_declaration
| "%{...%}"
{
- code_props plain_code;
- code_props_plain_init (&plain_code, $1, @1);
- code_props_translate_code (&plain_code);
- gram_scanner_last_string_free ();
muscle_code_grow (union_seen ? "post_prologue" : "pre_prologue",
- plain_code.code, @1);
+ translate_code ($1, @1, true), @1);
code_scanner_last_string_free ();
}
| "%<flag>"
}
| "%initial-action" "{...}"
{
- code_props action;
- code_props_symbol_action_init (&action, $2, @2);
- code_props_translate_code (&action);
- gram_scanner_last_string_free ();
- muscle_code_grow ("initial_action", action.code, @2);
+ muscle_code_grow ("initial_action", translate_code ($2, @2, false), @2);
code_scanner_last_string_free ();
}
| "%language" STRING { language_argmatch ($2, grammar_prio, @1); }
{
default_prec = false;
}
-| "%code" braceless
+| "%code" "{...}"
{
/* Do not invoke muscle_percent_code_grow here since it invokes
muscle_user_name_list_grow. */
- muscle_code_grow ("percent_code()", $2, @2);
+ muscle_code_grow ("percent_code()",
+ translate_code_braceless ($2, @2), @2);
code_scanner_last_string_free ();
}
-| "%code" ID braceless
+| "%code" ID "{...}"
{
- muscle_percent_code_grow ($2, @2, $3, @3);
+ muscle_percent_code_grow ($2, @2, translate_code_braceless ($3, @3), @3);
code_scanner_last_string_free ();
}
;
;
grammar_declaration:
- "%union" union_name braceless
+ "%union" union_name "{...}"
{
union_seen = true;
- muscle_code_grow ("union_members", $3, @3);
+ muscle_code_grow ("union_members", translate_code_braceless ($3, @3), @3);
code_scanner_last_string_free ();
}
;
} <value>;
value:
- %empty { $$.kind = muscle_keyword; $$.chars = ""; }
-| ID { $$.kind = muscle_keyword; $$.chars = $1; }
-| STRING { $$.kind = muscle_string; $$.chars = $1; }
-| braceless { $$.kind = muscle_code; $$.chars = $1; }
-;
-
-
-/*------------.
-| braceless. |
-`------------*/
-
-braceless:
- "{...}"
- {
- code_props plain_code;
- $1[strlen ($1) - 1] = '\0';
- code_props_plain_init (&plain_code, $1+1, @1);
- code_props_translate_code (&plain_code);
- gram_scanner_last_string_free ();
- $$ = plain_code.code;
- }
+ %empty { $$.kind = muscle_keyword; $$.chars = ""; }
+| ID { $$.kind = muscle_keyword; $$.chars = $1; }
+| STRING { $$.kind = muscle_string; $$.chars = $1; }
+| "{...}" { $$.kind = muscle_code; $$.chars = strip_braces ($1); }
;
%empty
| "%%" EPILOGUE
{
- 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);
+ muscle_code_grow ("epilogue", translate_code ($2, @2, true), @2);
code_scanner_last_string_free ();
}
;
return loc;
}
+static
+char *strip_braces (char *code)
+{
+ code[strlen(code) - 1] = 0;
+ return code + 1;
+}
+
+static
+char const *
+translate_code (char *code, location loc, bool plain)
+{
+ code_props plain_code;
+ if (plain)
+ code_props_plain_init (&plain_code, code, loc);
+ else
+ code_props_symbol_action_init (&plain_code, code, loc);
+ code_props_translate_code (&plain_code);
+ gram_scanner_last_string_free ();
+ return plain_code.code;
+}
+
+static
+char const *
+translate_code_braceless (char *code, location loc)
+{
+ return translate_code (strip_braces (code), loc, true);
+}
static void
add_param (param_type type, char *decl, location loc)
return quotearg_style (escape_quoting_style, buf);
}
}
+
+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;
+}
projects / bison.git / blobdiff