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[bison.git] / src / scan-skel.l

diff --git a/src/scan-skel.l b/src/scan-skel.l
index 0bb71d196f33fcbbdfc56495244ebe83ed975835..e56d37230c26ff6b9b8460e170b6888ce8a23d35 100644 (file)
--- a/src/scan-skel.l
+++ b/src/scan-skel.l
@@ -1,6 +1,5 @@
-                                                             /* -*- C -*- */
-/* Scan Bison Skeletons.
-   Copyright (C) 2001  Free Software Foundation, Inc.
+/* Scan Bison Skeletons.                                       -*- C -*-
+   Copyright (C) 2001, 2002  Free Software Foundation, Inc.
 
    This file is part of Bison, the GNU Compiler Compiler.
 
@@ -19,55 +18,52 @@
    Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
    02111-1307, USA.  */
 
+%option nodefault noyywrap nounput never-interactive
+%option prefix="skel_" outfile="lex.yy.c"
+
 %{
 #include "system.h"
-#include "skeleton.h"
-#include "parse-skel.h"
+#include "error.h"
+#include "getargs.h"
+#include "files.h"
+int skel_lex (void);
+static int yylineno = 1;
+static char *yyoutname = NULL;
 %}
-
-%option nounput
-%option noyywrap
-/* If we enable
-
-   %option yylineno
-
-   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???  */
-
+%%
+  /* This is an approximation, but we don't need more. */
+^"#output \""[^\"]+\"\n        {
+     yytext[yyleng - 2] = '\0';
+     XFREE (yyoutname);
+     yyoutname = xstrdup (yytext + strlen ("#output \""));
+     yyout = xfopen (yyoutname, "w");
+     yylineno = 1;
+   }
+
+"@<:@"           fputc ('[', yyout);
+"@:>@"           fputc (']', yyout);
+
+"__oline__"      fprintf (yyout, "%d", yylineno+1);
+"__ofile__"      fprintf (yyout, "%s", yyoutname);
+[^@_\n]+         ECHO;
+\n+              yylineno += yyleng; ECHO;
+.                ECHO;
+
+<<EOF>>          xfclose (yyout); free (yyoutname); return EOF;
 %%
 
-"%%{line}"          { return LINE; }
-"%%{skeleton-line}" { return SLINE; }
-
-"%%{yacc}"    { return YACC; }
-"%%{section}" { return SECTION; }
-
-"%%{guards}"   { return GUARDS; }
-"%%{actions}"  { return ACTIONS; }
-"%%{tokendef}" { return TOKENS; }
+/*------------------------.
+| Scan a Bison skeleton.  |
+`------------------------*/
 
-  /* Muscle.  */
-"%%{"[a-zA-Z][0-9a-zA-Z_-]+"}" {
-  yylval.muscle = xstrndup (yytext + 3, yyleng - 4);
-  return MUSCLE;
-}
+void scan_skel (FILE *);
 
-  /* String.  */
-"%%\"".*"\"" {
-  yylval.string = xstrndup (yytext + 3, yyleng - 4);
-  return STRING;
-}
+void
+scan_skel (FILE *in)
+{
+  skel_in = in;
+  skel_lex ();
 
-  /* End of line.  */
-"\n" {
-  return '\n';
+  /* Reclaim Flex's buffers.  */
+  yy_delete_buffer (YY_CURRENT_BUFFER);
 }
-
-  /* Plain Character.  */
-. {
-  yylval.character = *yytext;
-  return CHARACTER;
-}
-
-%%