X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/aed7fd9b9736c68bf23bb42ab422baf1281acf32..a17187e56386747a9b4d9633c3d116c2087f2b8b:/src/scan-skel.l
diff --git a/src/scan-skel.l b/src/scan-skel.l
index b04968c4..e15294a1 100644
--- a/src/scan-skel.l
+++ b/src/scan-skel.l
@@ -1,96 +1,305 @@
- /* -*- C -*- */
-/* Scan Bison Skeletons.
- Copyright (C) 2001 Free Software Foundation, Inc.
+/* Scan Bison Skeletons. -*- C -*-
+
+ Copyright (C) 2001-2012 Free Software Foundation, Inc.
This file is part of Bison, the GNU Compiler Compiler.
- Bison 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, or (at your option)
- any later version.
+ 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 3 of the License, or
+ (at your option) any later version.
- Bison is distributed in the hope that it will be useful, but
- WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- General Public License for more details.
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
You should have received a copy of the GNU General Public License
- along with Bison; see the file COPYING. If not, write to the Free
- Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
- 02111-1307, USA. */
+ along with this program. If not, see . */
-%option debug nodefault noyywrap nounput
+%option nodefault noyywrap noinput nounput never-interactive debug
%option prefix="skel_" outfile="lex.yy.c"
-/* If we enable
+%{
+/* Work around a bug in flex 2.5.31. See Debian bug 333231
+ . */
+#undef skel_wrap
+#define skel_wrap() 1
- %option yylineno
+#define FLEX_PREFIX(Id) skel_ ## Id
+#include
- Then we have warning: `yy_flex_realloc' defined but not used.
- Seems like a Flex bug to me: Why the heck yylineno would trigger
- the REJECT exception??? */
+#include
+#include
+#include
-%{
-#include "system.h"
-#include "skeleton.h"
-#include "parse-skel.h"
-%}
+#include
+#include
+#include
+#include
-%{
-/* Each time we match a string, move the end cursor to its end. */
-#define YY_USER_ACTION yylloc->last_column += yyleng;
+#define YY_DECL static int skel_lex (void)
+YY_DECL;
+
+#define QPUTS(String) \
+ fputs (quotearg_style (c_quoting_style, String), yyout)
+
+static void at_directive_perform (int at_directive_argc,
+ char *at_directive_argv[],
+ char **outnamep, int *out_linenop);
+static void fail_for_at_directive_too_many_args (char const *at_directive_name);
+static void fail_for_at_directive_too_few_args (char const *at_directive_name);
+static void fail_for_invalid_at (char const *at);
%}
+
+%x SC_AT_DIRECTIVE_ARGS
+%x SC_AT_DIRECTIVE_SKIP_WS
+
%%
+
%{
- /* At each yylex invocation, mark the current position as the
- start of the next token. */
- LOCATION_STEP (*yylloc);
+ int out_lineno PACIFY_CC (= 0);
+ char *outname = NULL;
+
+ /* Currently, only the @warn, @complain, @fatal, @warn_at, @complain_at, and
+ @fatal_at directives take multiple arguments, and the last three already
+ can't take more than 7. at_directive_argv[0] is the directive name. */
+ #define AT_DIRECTIVE_ARGC_MAX 8
+ int at_directive_argc = 0;
+ char *at_directive_argv[AT_DIRECTIVE_ARGC_MAX];
%}
-"%%{line}" { return LINE; }
-"%%{skeleton-line}" { return SLINE; }
+"@@" fputc ('@', yyout);
+"@{" fputc ('[', yyout);
+"@}" fputc (']', yyout);
+"@`" /* Empty. Used by b4_cat in ../data/bison.m4. */
+@\n /* Likewise. */
-"%%{yacc}" { return YACC; }
-"%%{section}" { return SECTION; }
+"@oline@" fprintf (yyout, "%d", out_lineno + 1);
+"@ofile@" QPUTS (outname);
+"@dir_prefix@" QPUTS (dir_prefix);
-"%%{guards}" { return GUARDS; }
-"%%{actions}" { return ACTIONS; }
-"%%{tokendef}" { return TOKENS; }
+@[a-z_]+"(" {
+ yytext[yyleng-1] = '\0';
+ obstack_grow (&obstack_for_string, yytext, yyleng);
+ at_directive_argv[at_directive_argc++] =
+ obstack_finish (&obstack_for_string);
+ BEGIN SC_AT_DIRECTIVE_ARGS;
+}
- /* Muscle. */
-"%%{"[a-zA-Z][0-9a-zA-Z_-]+"}" {
- yylval->string = xstrndup (yytext + 3, yyleng - 4);
- return MUSCLE;
+ /* This pattern must not match more than the previous @ patterns. */
+@[^@{}`(\n]* fail_for_invalid_at (yytext);
+\n out_lineno++; ECHO;
+[^@\n]+ ECHO;
+
+<> {
+ if (outname)
+ {
+ free (outname);
+ xfclose (yyout);
+ }
+ return EOF;
}
- /* String. */
-"%%\"".*"\"" {
- yylval->string = xstrndup (yytext + 3, yyleng - 4);
- return STRING;
+{
+ [^@]+ { STRING_GROW; }
+
+ "@@" { obstack_1grow (&obstack_for_string, '@'); }
+ "@{" { obstack_1grow (&obstack_for_string, '['); }
+ "@}" { obstack_1grow (&obstack_for_string, ']'); }
+ "@`" /* Empty. Useful for starting an argument
+ that begins with whitespace. */
+ @\n /* Empty. */
+
+ @[,)] {
+ if (at_directive_argc >= AT_DIRECTIVE_ARGC_MAX)
+ fail_for_at_directive_too_many_args (at_directive_argv[0]);
+
+ obstack_1grow (&obstack_for_string, '\0');
+ at_directive_argv[at_directive_argc++] =
+ obstack_finish (&obstack_for_string);
+
+ /* Like M4, skip whitespace after a comma. */
+ if (yytext[1] == ',')
+ BEGIN SC_AT_DIRECTIVE_SKIP_WS;
+ else
+ {
+ at_directive_perform (at_directive_argc, at_directive_argv,
+ &outname, &out_lineno);
+ obstack_free (&obstack_for_string, at_directive_argv[0]);
+ at_directive_argc = 0;
+ BEGIN INITIAL;
+ }
+ }
+
+ @.? { fail_for_invalid_at (yytext); }
}
- /* End of line. */
-"\n" {
- LOCATION_LINES (*yylloc, yyleng);
- return '\n';
+{
+ [ \t\r\n]
+ . { yyless (0); BEGIN SC_AT_DIRECTIVE_ARGS; }
}
- /* White spaces. */
-[\t ]+ {
- yylval->string = yytext;
- return BLANKS;
+{
+ <> {
+ fatal (_("unclosed %s directive in skeleton"), at_directive_argv[0]);
+ }
}
- /* Plain Characters. */
-[^%\n]+ {
- yylval->string = yytext;
- return RAW;
+%%
+
+/*------------------------.
+| Scan a Bison skeleton. |
+`------------------------*/
+
+void
+scan_skel (FILE *in)
+{
+ static bool initialized = false;
+ if (!initialized)
+ {
+ initialized = true;
+ obstack_init (&obstack_for_string);
+ }
+ skel_in = in;
+ skel__flex_debug = trace_flag & trace_skeleton;
+ skel_lex ();
}
- /* Plain Character. */
-. {
- yylval->character = *yytext;
- return CHARACTER;
+void
+skel_scanner_free (void)
+{
+ obstack_free (&obstack_for_string, 0);
+ /* Reclaim Flex's buffers. */
+ yylex_destroy ();
}
-%%
+static void
+at_directive_perform (int at_directive_argc,
+ char *at_directive_argv[],
+ char **outnamep, int *out_linenop)
+{
+ if (STREQ (at_directive_argv[0], "@basename"))
+ {
+ if (at_directive_argc > 2)
+ fail_for_at_directive_too_many_args (at_directive_argv[0]);
+ fputs (last_component (at_directive_argv[1]), yyout);
+ }
+ else if (STREQ (at_directive_argv[0], "@warn")
+ || STREQ (at_directive_argv[0], "@complain")
+ || STREQ (at_directive_argv[0], "@fatal"))
+ {
+ void (*func)(char const *, ...);
+ switch (at_directive_argv[0][1])
+ {
+ case 'w': func = warn; break;
+ case 'c': func = complain; break;
+ case 'f': func = fatal; break;
+ default: aver (false); break;
+ }
+ switch (at_directive_argc)
+ {
+ case 2:
+ func (_(at_directive_argv[1]));
+ break;
+ case 3:
+ func (_(at_directive_argv[1]), at_directive_argv[2]);
+ break;
+ case 4:
+ func (_(at_directive_argv[1]), at_directive_argv[2],
+ at_directive_argv[3]);
+ break;
+ case 5:
+ func (_(at_directive_argv[1]), at_directive_argv[2],
+ at_directive_argv[3], at_directive_argv[4]);
+ break;
+ case 6:
+ func (_(at_directive_argv[1]), at_directive_argv[2],
+ at_directive_argv[3], at_directive_argv[4],
+ at_directive_argv[5]);
+ break;
+ default:
+ fail_for_at_directive_too_many_args (at_directive_argv[0]);
+ break;
+ }
+ }
+ else if (STREQ (at_directive_argv[0], "@warn_at")
+ || STREQ (at_directive_argv[0], "@complain_at")
+ || STREQ (at_directive_argv[0], "@fatal_at"))
+ {
+ void (*func)(location, char const *, ...);
+ location loc;
+ if (at_directive_argc < 4)
+ fail_for_at_directive_too_few_args (at_directive_argv[0]);
+ switch (at_directive_argv[0][1])
+ {
+ case 'w': func = warn_at; break;
+ case 'c': func = complain_at; break;
+ case 'f': func = fatal_at; break;
+ default: aver (false); break;
+ }
+ boundary_set_from_string (&loc.start, at_directive_argv[1]);
+ boundary_set_from_string (&loc.end, at_directive_argv[2]);
+ switch (at_directive_argc)
+ {
+ case 4:
+ func (loc, _(at_directive_argv[3]));
+ break;
+ case 5:
+ func (loc, _(at_directive_argv[3]), at_directive_argv[4]);
+ break;
+ case 6:
+ func (loc, _(at_directive_argv[3]), at_directive_argv[4],
+ at_directive_argv[5]);
+ break;
+ case 7:
+ func (loc, _(at_directive_argv[3]), at_directive_argv[4],
+ at_directive_argv[5], at_directive_argv[6]);
+ break;
+ case 8:
+ func (loc, _(at_directive_argv[3]), at_directive_argv[4],
+ at_directive_argv[5], at_directive_argv[6],
+ at_directive_argv[7]);
+ break;
+ default:
+ fail_for_at_directive_too_many_args (at_directive_argv[0]);
+ break;
+ }
+ }
+ else if (STREQ (at_directive_argv[0], "@output"))
+ {
+ if (at_directive_argc > 2)
+ fail_for_at_directive_too_many_args (at_directive_argv[0]);
+ if (*outnamep)
+ {
+ free (*outnamep);
+ xfclose (yyout);
+ }
+ *outnamep = xstrdup (at_directive_argv[1]);
+ output_file_name_check (outnamep);
+ yyout = xfopen (*outnamep, "w");
+ *out_linenop = 1;
+ }
+ else
+ fail_for_invalid_at (at_directive_argv[0]);
+}
+
+static void
+fail_for_at_directive_too_few_args (char const *at_directive_name)
+{
+ fatal (_("too few arguments for %s directive in skeleton"),
+ at_directive_name);
+}
+
+static void
+fail_for_at_directive_too_many_args (char const *at_directive_name)
+{
+ fatal (_("too many arguments for %s directive in skeleton"),
+ at_directive_name);
+}
+
+static void
+fail_for_invalid_at (char const *at)
+{
+ fatal ("invalid @ in skeleton: %s", at);
+}