* src/muscle_tab.h (MUSCLE_INSERT_INT, MUSCLE_INSERT_STRING)

(MUSCLE_INSERT_PREFIX): ...to there.
* src/output.c (MUSCLE_INSERT_INT, MUSCLE_INSERT_STRING)
(MUSCLE_INSERT_PREFIX): Move from here...
* src/bison.hairy: Add a section directive.  Put braces around muscle
names.  This parser skeleton is still broken, but Bison should not
choke on a bad muscle 'syntax'.
* src/bison.simple: Add a section directive.  Put braces around muscle
names.
* src/files.h (strsuffix, stringappend): Add declarations.
(tab_extension): Add declaration.
(short_base_name): Add declaration.
* src/files.c (strsuffix, stringappend): No longer static.  These
functions are used in the skeleton parser.
(tab_extension): New.
(compute_base_names): Use the computations done in this function
to guess if the generated parsers should have '.tab' in their
names.
(short_base_name): No longer static.
* src/output.c (output_skeleton): New.
(output): Disable call to output_master_parser, and give a try to
a new skeleton handling system.
(guards_output, actions_output): No longer static.
(token_definitions_output, get_lines_number): No longer static.
* configure.in: Use AM_PROG_LEX and AC_PROG_YACC.
* src/Makefile.am (bison_SOURCES): Add scan-skel.l and
parse-skel.y.
* src/parse-skel.y: New file.
* src/scan-skel.l: New file.

src/scan-skel.l

@@ -0,0 +1,55 @@
+%{
+
+#include <stdlib.h>
+#include <string.h>
+
+#include "parse-skel.h"
+
+%}
+
+%option nounput
+%option noyywrap
+%option yylineno
+
+%%
+
+"%%{line}"          { return LINE; }
+"%%{skeleton-line}" { return SLINE; }
+
+"%%{yacc}"    { return YACC; }
+"%%{section}" { return SECTION; }
+
+"%%{guards}"   { return GUARDS; }
+"%%{actions}"  { return ACTIONS; }
+"%%{tokendef}" { return TOKENS; }
+
+"%%{"[a-zA-Z][0-9a-zA-Z_-]+"}" { /* Muscle.  */
+  size_t len = strlen (yytext);
+  yylval.string = (char*) malloc (len - 3);
+  strncpy (yylval.string, yytext + 3, len - 4);
+  yylval.string[len - 4] = 0;
+  return MUSCLE;
+}
+
+"%%\"".*"\"" { /* String.  */
+  size_t len = strlen (yytext);
+  yylval.string = (char*) malloc (len - 3);
+  strncpy (yylval.string, yytext + 3, len - 4);
+  yylval.string[len - 4] = 0;
+  return STRING;
+}
+
+<<EOF>> { /* End of file.  */
+  return 0;
+}
+
+"\n" { /* End of line.  */
+  return '\n';
+}
+
+. { /* Character.  */
+  yylval.character = *yytext;
+  return CHARACTER;
+}
+
+%%