1 /* Common parts between scan-code.l, scan-gram.l, and scan-skel.l.
3 Copyright (C) 2006, 2009-2012 Free Software Foundation, Inc.
5 This file is part of Bison, the GNU Compiler Compiler.
7 This program is free software: you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation, either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>. */
21 # error "FLEX_PREFIX not defined"
24 /* Flex full version as a number. */
25 #define FLEX_VERSION \
26 ((YY_FLEX_MAJOR_VERSION) * 1000000 \
27 + (YY_FLEX_MINOR_VERSION) * 1000 \
28 + (YY_FLEX_SUBMINOR_VERSION))
30 /* Pacify "gcc -Wmissing-prototypes" when flex 2.5.31 is used. */
31 # if FLEX_VERSION <= 2005031
32 int FLEX_PREFIX (get_lineno
) (void);
33 FILE *FLEX_PREFIX (get_in
) (void);
34 FILE *FLEX_PREFIX (get_out
) (void);
35 int FLEX_PREFIX (get_leng
) (void);
36 char *FLEX_PREFIX (get_text
) (void);
37 void FLEX_PREFIX (set_lineno
) (int);
38 void FLEX_PREFIX (set_in
) (FILE *);
39 void FLEX_PREFIX (set_out
) (FILE *);
40 int FLEX_PREFIX (get_debug
) (void);
41 void FLEX_PREFIX (set_debug
) (int);
42 int FLEX_PREFIX (lex_destroy
) (void);
45 #define last_string FLEX_PREFIX (last_string)
47 /* It seems to be a nice "feature" of Flex that one cannot use yytext,
48 yyleng etc. when a prefix is given, since there is no longer a
49 #define, but rather the token is actually changed in the output.
50 However, this is not true for Flex 2.5.4. */
52 # define yyleng FLEX_PREFIX (leng)
55 # define yytext FLEX_PREFIX (text)
58 /* Non-reentrant scanners generated by Flex 2.5.9 and later (and some earlier
59 versions according to the Flex manual) leak memory if yylex_destroy is not
60 invoked. However, yylex_destroy is not defined before Flex 2.5.9, so give
61 an implementation here that at least appears to work with Flex 2.5.4. */
62 #if FLEX_VERSION <= 2005009
63 # define yylex_destroy() yy_delete_buffer (YY_CURRENT_BUFFER)
66 /* OBSTACK_FOR_STRING -- Used to store all the characters that we need to
67 keep (to construct ID, STRINGS etc.). Use the following macros to
70 Use STRING_GROW to append what has just been matched, and
71 STRING_FINISH to end the string (it puts the ending 0).
72 STRING_FINISH also stores this string in LAST_STRING, which can be
73 used, and which is used by STRING_FREE to free the last string. */
75 #ifndef FLEX_NO_OBSTACK
77 static struct obstack obstack_for_string
;
79 # define STRING_GROW \
80 obstack_grow (&obstack_for_string, yytext, yyleng)
82 # define STRING_FINISH \
84 obstack_1grow (&obstack_for_string, '\0'); \
85 last_string = obstack_finish (&obstack_for_string); \
88 # define STRING_FREE \
89 obstack_free (&obstack_for_string, last_string)