X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/a4b36db458949986bd80257e2e253728ba4d31a8..957255b82cdbf46a5f74d33862ad7edf7d0fa218:/src/scan-skel.l
diff --git a/src/scan-skel.l b/src/scan-skel.l
index 0bb71d19..129b8899 100644
--- a/src/scan-skel.l
+++ b/src/scan-skel.l
@@ -1,73 +1,271 @@
- /* -*- C -*- */
-/* Scan Bison Skeletons.
- Copyright (C) 2001 Free Software Foundation, Inc.
+/* Scan Bison Skeletons. -*- C -*-
+
+ Copyright (C) 2001-2013 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 nodefault noyywrap noinput nounput never-interactive debug
+%option prefix="skel_" outfile="lex.yy.c"
%{
-#include "system.h"
-#include "skeleton.h"
-#include "parse-skel.h"
-%}
+/* Work around a bug in flex 2.5.31. See Debian bug 333231
+ . */
+#undef skel_wrap
+#define skel_wrap() 1
+
+#define FLEX_PREFIX(Id) skel_ ## Id
+#include
+
+#include
+#include
+#include
-%option nounput
-%option noyywrap
-/* If we enable
+#include
+#include
+#include
+#include
- %option yylineno
+#define YY_DECL static int skel_lex (void)
+YY_DECL;
- 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??? */
+typedef void (*at_directive)(int, char**, char **, int*);
+static void at_init (int *argc, char *argv[], at_directive *at_ptr, at_directive fun);
+static void at_basename (int argc, char *argv[], char**, int*);
+static void at_complain (int argc, char *argv[], char**, int*);
+static void at_output (int argc, char *argv[], char **name, int *lineno);
+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
%%
-"%%{line}" { return LINE; }
-"%%{skeleton-line}" { return SLINE; }
+%{
+ int out_lineno PACIFY_CC (= 0);
+ char *out_name = NULL;
+
+ /* Currently, only the @complain directive takes multiple arguments, and
+ never more than 7, with argv[0] being the directive name and argv[1]
+ being the type of complaint to dispatch. */
+#define ARGC_MAX 9
+ int argc = 0;
+ char *argv[ARGC_MAX];
+ at_directive at_ptr = NULL;
+%}
+
+"@@" fputc ('@', yyout);
+"@{" fputc ('[', yyout);
+"@}" fputc (']', yyout);
+"@'" continue; /* Used by b4_cat in ../data/bison.m4. */
+@\n continue;
+
+"@oline@" fprintf (yyout, "%d", out_lineno + 1);
+"@ofile@" fputs (quotearg_style (c_quoting_style, out_name), yyout);
-"%%{yacc}" { return YACC; }
-"%%{section}" { return SECTION; }
+"@basename(" at_init (&argc, argv, &at_ptr, &at_basename);
+"@complain(" at_init (&argc, argv, &at_ptr, &at_complain);
+"@output(" at_init (&argc, argv, &at_ptr, &at_output);
-"%%{guards}" { return GUARDS; }
-"%%{actions}" { return ACTIONS; }
-"%%{tokendef}" { return TOKENS; }
+ /* This pattern must not match more than the previous @ patterns. */
+@[^@{}\'(\n]* fail_for_invalid_at (yytext);
+\n out_lineno++; ECHO;
+[^@\n]+ ECHO;
- /* Muscle. */
-"%%{"[a-zA-Z][0-9a-zA-Z_-]+"}" {
- yylval.muscle = xstrndup (yytext + 3, yyleng - 4);
- return MUSCLE;
+<> {
+ if (out_name)
+ {
+ free (out_name);
+ 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, ']');
+ "@'" continue; /* For starting an argument that begins with whitespace. */
+ @\n continue;
+
+ @[,)] {
+ if (argc >= ARGC_MAX)
+ fail_for_at_directive_too_many_args (argv[0]);
+
+ argv[argc++] = obstack_finish0 (&obstack_for_string);
+
+ /* Like M4, skip whitespace after a comma. */
+ if (yytext[1] == ',')
+ BEGIN SC_AT_DIRECTIVE_SKIP_WS;
+ else
+ {
+ aver (at_ptr);
+ at_ptr (argc, argv, &out_name, &out_lineno);
+ obstack_free (&obstack_for_string, argv[0]);
+ argc = 0;
+ BEGIN INITIAL;
+ }
+ }
+
+ @.? fail_for_invalid_at (yytext);
}
- /* End of line. */
-"\n" {
- return '\n';
+
+{
+ [ \t\r\n] continue;
+ . yyless (0); BEGIN SC_AT_DIRECTIVE_ARGS;
}
- /* Plain Character. */
-. {
- yylval.character = *yytext;
- return CHARACTER;
+
+{
+ <> complain (NULL, fatal, _("unclosed %s directive in skeleton"), argv[0]);
}
%%
+
+static void
+at_init (int *argc, char *argv[], at_directive *at_ptr, at_directive fun)
+{
+ *at_ptr = fun;
+ yytext[yyleng-1] = '\0';
+ obstack_grow (&obstack_for_string, yytext, yyleng);
+ argv[(*argc)++] = obstack_finish (&obstack_for_string);
+ BEGIN SC_AT_DIRECTIVE_ARGS;
+}
+
+/*------------------------.
+| 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 ();
+}
+
+void
+skel_scanner_free (void)
+{
+ obstack_free (&obstack_for_string, 0);
+ /* Reclaim Flex's buffers. */
+ yylex_destroy ();
+}
+
+static inline warnings
+flag (const char *arg)
+{
+ /* compare with values issued from b4_error */
+ if (STREQ (arg, "complain"))
+ return complaint;
+ else if (STREQ (arg, "deprecated"))
+ return Wdeprecated;
+ else if (STREQ (arg, "fatal"))
+ return fatal;
+ else if (STREQ (arg, "note"))
+ return silent | complaint | no_caret;
+ else if (STREQ (arg, "warn"))
+ return Wother;
+ else
+ aver (false);
+}
+
+static void
+at_basename (int argc, char *argv[], char **out_namep, int *out_linenop)
+{
+ (void) out_namep;
+ (void) out_linenop;
+ if (2 < argc)
+ fail_for_at_directive_too_many_args (argv[0]);
+ fputs (last_component (argv[1]), yyout);
+}
+
+static void
+at_complain (int argc, char *argv[], char **out_namep, int *out_linenop)
+{
+ static unsigned indent;
+ warnings w = flag (argv[1]);
+ location loc;
+ location *locp = NULL;
+
+ (void) out_namep;
+ (void) out_linenop;
+
+ if (argc < 4)
+ fail_for_at_directive_too_few_args (argv[0]);
+ if (argv[2] && argv[2][0])
+ {
+ boundary_set_from_string (&loc.start, argv[2]);
+ boundary_set_from_string (&loc.end, argv[3]);
+ locp = &loc;
+ }
+ if (w & silent)
+ indent += SUB_INDENT;
+ else
+ indent = 0;
+ complain_args (locp, w, &indent, argc - 4, argv + 4);
+ if (w & silent)
+ indent -= SUB_INDENT;
+}
+
+static void
+at_output (int argc, char *argv[], char **out_namep, int *out_linenop)
+{
+ if (2 < argc)
+ fail_for_at_directive_too_many_args (argv[0]);
+ if (*out_namep)
+ {
+ free (*out_namep);
+ xfclose (yyout);
+ }
+ *out_namep = xstrdup (argv[1]);
+ output_file_name_check (out_namep, true);
+ /* If there were errors, do not generate the output. */
+ yyout = xfopen (complaint_status ? "/dev/null" : *out_namep, "w");
+ *out_linenop = 1;
+}
+
+static void
+fail_for_at_directive_too_few_args (char const *at_directive_name)
+{
+ complain (NULL, 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)
+{
+ complain (NULL, fatal, _("too many arguments for %s directive in skeleton"),
+ at_directive_name);
+}
+
+static void
+fail_for_invalid_at (char const *at)
+{
+ complain (NULL, fatal, "invalid @ in skeleton: %s", at);
+}