/* Bison Grammar Scanner -*- C -*-
- Copyright (C) 2002, 2003, 2004 Free Software Foundation, Inc.
+ Copyright (C) 2002, 2003, 2004, 2005 Free Software Foundation, Inc.
This file is part of Bison, the GNU Compiler Compiler.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
- Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
- 02111-1307 USA
+ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ 02110-1301 USA
*/
%option debug nodefault nounput noyywrap never-interactive
%option prefix="gram_" outfile="lex.yy.c"
%{
+/* Work around a bug in flex 2.5.31. See Debian bug 333231
+ <http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=333231>. */
+#undef gram_wrap
+#define gram_wrap() 1
+
#include "system.h"
#include <mbswidth.h>
#include "files.h"
#include "getargs.h"
#include "gram.h"
+#include "quotearg.h"
#include "reader.h"
#include "uniqstr.h"
} \
while (0)
+/* Pacify "gcc -Wmissing-prototypes" when flex 2.5.31 is used. */
+int gram_get_lineno (void);
+FILE *gram_get_in (void);
+FILE *gram_get_out (void);
+int gram_get_leng (void);
+char *gram_get_text (void);
+void gram_set_lineno (int);
+void gram_set_in (FILE *);
+void gram_set_out (FILE *);
+int gram_get_debug (void);
+void gram_set_debug (int);
+int gram_lex_destroy (void);
+
/* Location of scanner cursor. */
boundary scanner_cursor;
static unsigned long int scan_integer (char const *p, int base, location loc);
static int convert_ucn_to_byte (char const *hex_text);
static void unexpected_eof (boundary, char const *);
+static void unexpected_newline (boundary, char const *);
%}
%x SC_COMMENT SC_LINE_COMMENT SC_YACC_COMMENT
<INITIAL,SC_AFTER_IDENTIFIER,SC_PRE_CODE>
{
- [ \f\n\t\v] ;
+ /* Comments and white space. */
"," warn_at (*loc, _("stray `,' treated as white space"));
-
- /* Comments. */
+ [ \f\n\t\v] |
"//".* ;
"/*" {
token_start = loc->start;
"%dprec" return PERCENT_DPREC;
"%error"[-_]"verbose" return PERCENT_ERROR_VERBOSE;
"%expect" return PERCENT_EXPECT;
+ "%expect"[-_]"rr" return PERCENT_EXPECT_RR;
"%file-prefix" return PERCENT_FILE_PREFIX;
"%fixed"[-_]"output"[-_]"files" return PERCENT_YACC;
"%initial-action" token_type = PERCENT_INITIAL_ACTION; BEGIN SC_PRE_CODE;
"%prec" rule_length--; return PERCENT_PREC;
"%printer" token_type = PERCENT_PRINTER; BEGIN SC_PRE_CODE;
"%pure"[-_]"parser" return PERCENT_PURE_PARSER;
+ "%require" return PERCENT_REQUIRE;
"%right" return PERCENT_RIGHT;
"%skeleton" return PERCENT_SKELETON;
"%start" return PERCENT_START;
"'" STRING_GROW; token_start = loc->start; BEGIN SC_ESCAPED_CHARACTER;
/* Strings. */
- "\"" STRING_GROW; token_start = loc->start; BEGIN SC_ESCAPED_STRING;
+ "\"" token_start = loc->start; BEGIN SC_ESCAPED_STRING;
/* Prologue. */
"%{" code_start = loc->start; BEGIN SC_PROLOGUE;
}
- /*----------------------------------------------------------------.
- | Scanning a C string, including its escapes. The initial `"' is |
- | already eaten. |
- `----------------------------------------------------------------*/
+ /*------------------------------------------------.
+ | Scanning a Bison string, including its escapes. |
+ | The initial quote is already eaten. |
+ `------------------------------------------------*/
<SC_ESCAPED_STRING>
{
"\"" {
- STRING_GROW;
STRING_FINISH;
loc->start = token_start;
val->chars = last_string;
BEGIN INITIAL;
return STRING;
}
-
- \0 complain_at (*loc, _("invalid null character"));
- .|\n STRING_GROW;
- <<EOF>> unexpected_eof (token_start, "\""); BEGIN INITIAL;
+ \n unexpected_newline (token_start, "\""); BEGIN INITIAL;
+ <<EOF>> unexpected_eof (token_start, "\""); BEGIN INITIAL;
}
- /*---------------------------------------------------------------.
- | Scanning a C character, decoding its escapes. The initial "'" |
- | is already eaten. |
- `---------------------------------------------------------------*/
+ /*----------------------------------------------------------.
+ | Scanning a Bison character literal, decoding its escapes. |
+ | The initial quote is already eaten. |
+ `----------------------------------------------------------*/
<SC_ESCAPED_CHARACTER>
{
STRING_GROW;
STRING_FINISH;
loc->start = token_start;
- val->symbol = symbol_get (last_string, *loc);
+ val->symbol = symbol_get (quotearg_style (escape_quoting_style,
+ last_string),
+ *loc);
symbol_class_set (val->symbol, token_sym, *loc);
last_string_1 = last_string[1];
symbol_user_token_number_set (val->symbol, last_string_1, *loc);
BEGIN INITIAL;
return ID;
}
+ \n unexpected_newline (token_start, "'"); BEGIN INITIAL;
+ <<EOF>> unexpected_eof (token_start, "'"); BEGIN INITIAL;
+}
+<SC_ESCAPED_CHARACTER,SC_ESCAPED_STRING>
+{
\0 complain_at (*loc, _("invalid null character"));
- .|\n STRING_GROW;
- <<EOF>> unexpected_eof (token_start, "'"); BEGIN INITIAL;
}
unsigned long int c = strtoul (yytext + 1, 0, 8);
if (UCHAR_MAX < c)
complain_at (*loc, _("invalid escape sequence: %s"), quote (yytext));
- else if (! c)
+ else if (! c)
complain_at (*loc, _("invalid null character: %s"), quote (yytext));
else
obstack_1grow (&obstack_for_string, c);
}
}
+ /*--------------------------------------------.
+ | Scanning user-code characters and strings. |
+ `--------------------------------------------*/
- /*----------------------------------------------------------.
- | Scanning a C character without decoding its escapes. The |
- | initial "'" is already eaten. |
- `----------------------------------------------------------*/
+<SC_CHARACTER,SC_STRING>
+{
+ {splice}|\\{splice}[^\n$@\[\]] STRING_GROW;
+}
<SC_CHARACTER>
{
- "'" STRING_GROW; BEGIN context_state;
- \\{splice}[^$@\[\]] STRING_GROW;
- <<EOF>> unexpected_eof (token_start, "'"); BEGIN context_state;
+ "'" STRING_GROW; BEGIN context_state;
+ \n unexpected_newline (token_start, "'"); BEGIN context_state;
+ <<EOF>> unexpected_eof (token_start, "'"); BEGIN context_state;
}
-
- /*----------------------------------------------------------------.
- | Scanning a C string, without decoding its escapes. The initial |
- | `"' is already eaten. |
- `----------------------------------------------------------------*/
-
<SC_STRING>
{
- "\"" STRING_GROW; BEGIN context_state;
- \\{splice}[^$@\[\]] STRING_GROW;
- <<EOF>> {
- unexpected_eof (token_start, "\"");
- BEGIN context_state;
- }
+ "\"" STRING_GROW; BEGIN context_state;
+ \n unexpected_newline (token_start, "\""); BEGIN context_state;
+ <<EOF>> unexpected_eof (token_start, "\""); BEGIN context_state;
}
}
else
{
- complain_at (*loc, _("missing `{' in `%s'"),
+ complain_at (*loc, _("missing `{' in %s"),
token_name (token_type));
obstack_sgrow (&obstack_for_string, "{}");
STRING_FINISH;
"$"("<"{tag}">")?(-?[0-9]+|"$") handle_dollar (token_type, yytext, *loc);
"@"(-?[0-9]+|"$") handle_at (token_type, yytext, *loc);
+ "$" {
+ warn_at (*loc, _("stray `$'"));
+ obstack_sgrow (&obstack_for_string, "$][");
+ }
+ "@" {
+ warn_at (*loc, _("stray `@'"));
+ obstack_sgrow (&obstack_for_string, "@@");
+ }
+
<<EOF>> unexpected_eof (code_start, "}"); BEGIN INITIAL;
}
}
- /*----------------------------------------------------------------.
- | By default, grow the string obstack with the input, escaping M4 |
- | quoting characters. |
- `----------------------------------------------------------------*/
+ /*-----------------------------------------.
+ | Escape M4 quoting characters in C code. |
+ `-----------------------------------------*/
<SC_COMMENT,SC_LINE_COMMENT,SC_STRING,SC_CHARACTER,SC_BRACED_CODE,SC_PROLOGUE,SC_EPILOGUE>
{
\@ obstack_sgrow (&obstack_for_string, "@@");
\[ obstack_sgrow (&obstack_for_string, "@{");
\] obstack_sgrow (&obstack_for_string, "@}");
- .|\n STRING_GROW;
}
+ /*-----------------------------------------------------.
+ | By default, grow the string obstack with the input. |
+ `-----------------------------------------------------*/
+
+<SC_COMMENT,SC_LINE_COMMENT,SC_BRACED_CODE,SC_PROLOGUE,SC_EPILOGUE,SC_STRING,SC_CHARACTER,SC_ESCAPED_STRING,SC_ESCAPED_CHARACTER>. |
+<SC_COMMENT,SC_LINE_COMMENT,SC_BRACED_CODE,SC_PROLOGUE,SC_EPILOGUE>\n STRING_GROW;
+
%%
/* Keeps track of the maximum number of semantic values to the left of
if (!type_name)
type_name = "";
obstack_fgrow3 (&obstack_for_string,
- "]b4_rhs_value([%d], [%d], [%s])[",
+ "]b4_rhs_value(%d, %d, [%s])[",
rule_length, n, type_name);
}
else
if (INT_MIN <= num && num <= rule_length && ! get_errno ())
{
int n = num;
- obstack_fgrow2 (&obstack_for_string, "]b4_rhs_location([%d], [%d])[",
+ obstack_fgrow2 (&obstack_for_string, "]b4_rhs_location(%d, %d)[",
rule_length, n);
}
else
const char *file = NULL;
file = strchr (args, '"') + 1;
*strchr (file, '"') = 0;
- scanner_cursor.file = current_file = xstrdup (file);
+ scanner_cursor.file = current_file = uniqstr_new (file);
scanner_cursor.line = lineno;
scanner_cursor.column = 1;
}
+/*----------------------------------------------------------------.
+| For a token or comment starting at START, report message MSGID, |
+| which should say that an end marker was found before |
+| the expected TOKEN_END. |
+`----------------------------------------------------------------*/
+
+static void
+unexpected_end (boundary start, char const *msgid, char const *token_end)
+{
+ location loc;
+ loc.start = start;
+ loc.end = scanner_cursor;
+ complain_at (loc, _(msgid), token_end);
+}
+
+
/*------------------------------------------------------------------------.
| Report an unexpected EOF in a token or comment starting at START. |
| An end of file was encountered and the expected TOKEN_END was missing. |
static void
unexpected_eof (boundary start, char const *token_end)
{
- location loc;
- loc.start = start;
- loc.end = scanner_cursor;
- complain_at (loc, _("missing `%s' at end of file"), token_end);
+ unexpected_end (start, N_("missing `%s' at end of file"), token_end);
+}
+
+
+/*----------------------------------------.
+| Likewise, but for unexpected newlines. |
+`----------------------------------------*/
+
+static void
+unexpected_newline (boundary start, char const *token_end)
+{
+ unexpected_end (start, N_("missing `%s' at end of line"), token_end);
}
projects / bison.git / blobdiff