X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/4a678af8c6f178b797e42a60d7ee3774afbdc14e..43e6aea52686b0be3083c5b3c5657a06a79d22ef:/src/scan-gram.l
diff --git a/src/scan-gram.l b/src/scan-gram.l
index d5d92c4c..9bf156b2 100644
--- a/src/scan-gram.l
+++ b/src/scan-gram.l
@@ -1,12 +1,13 @@
/* Bison Grammar Scanner -*- C -*-
- Copyright (C) 2002, 2003, 2004, 2005, 2006 Free Software Foundation, Inc.
+ Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009 Free
+ Software Foundation, Inc.
This file is part of Bison, the GNU Compiler Compiler.
- This program is free software; you can redistribute it and/or modify
+ 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 2 of the License, or
+ the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
@@ -15,18 +16,12 @@
GNU General Public License for more details.
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., 51 Franklin Street, Fifth Floor, Boston, MA
- 02110-1301 USA
-*/
+ along with this program. If not, see . */
%option debug nodefault nounput noyywrap never-interactive
%option prefix="gram_" outfile="lex.yy.c"
%{
-#include
-#include "system.h"
-
/* Work around a bug in flex 2.5.31. See Debian bug 333231
. */
#undef gram_wrap
@@ -37,7 +32,6 @@
#include "complain.h"
#include "files.h"
-#include "getargs.h" /* yacc_flag */
#include "gram.h"
#include "quotearg.h"
#include "reader.h"
@@ -62,7 +56,7 @@ static size_t no_cr_read (FILE *, char *, size_t);
#define YY_INPUT(buf, result, size) ((result) = no_cr_read (yyin, buf, size))
/* A string representing the most recently saved token. */
-char *last_string;
+static char *last_string;
void
gram_scanner_last_string_free (void)
@@ -70,10 +64,6 @@ gram_scanner_last_string_free (void)
STRING_FREE;
}
-/* The location of the most recently saved token, if it was a
- BRACED_CODE token; otherwise, this has an unspecified value. */
-location gram_last_braced_code_loc;
-
static void handle_syncline (char *, location);
static unsigned long int scan_integer (char const *p, int base, location loc);
static int convert_ucn_to_byte (char const *hex_text);
@@ -99,9 +89,9 @@ static void unexpected_newline (boundary, char const *);
/* Strings and characters in code. */
%x SC_STRING SC_CHARACTER
-letter [.abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ_]
+letter [-.abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ_]
id {letter}({letter}|[0-9])*
-directive %{letter}({letter}|[0-9]|-)*
+directive %{id}
int [0-9]+
/* POSIX says that a tag must be both an id and a C union member, but
@@ -162,52 +152,57 @@ splice (\\[ \f\t\v]*\n)*
/*----------------------------.
| Scanning Bison directives. |
`----------------------------*/
+
+ /* For directives that are also command line options, the regex must be
+ "%..."
+ after "[-_]"s are removed, and the directive must match the --long
+ option name, with a single string argument. Otherwise, add exceptions
+ to ../build-aux/cross-options.pl. */
+
{
- "%after-header" return PERCENT_AFTER_HEADER;
- "%before-header" return PERCENT_BEFORE_HEADER;
- "%binary" return PERCENT_NONASSOC;
- "%debug" return PERCENT_DEBUG;
- "%default"[-_]"prec" return PERCENT_DEFAULT_PREC;
- "%define" return PERCENT_DEFINE;
- "%defines" return PERCENT_DEFINES;
- "%destructor" return PERCENT_DESTRUCTOR;
- "%dprec" return PERCENT_DPREC;
- "%end-header" return PERCENT_END_HEADER;
- "%error"[-_]"verbose" return PERCENT_ERROR_VERBOSE;
- "%expect" return PERCENT_EXPECT;
- "%expect"[-_]"rr" return PERCENT_EXPECT_RR;
- "%file-prefix" return PERCENT_FILE_PREFIX;
+ "%binary" return PERCENT_NONASSOC;
+ "%code" return PERCENT_CODE;
+ "%debug" return PERCENT_DEBUG;
+ "%default"[-_]"prec" return PERCENT_DEFAULT_PREC;
+ "%define" return PERCENT_DEFINE;
+ "%defines" return PERCENT_DEFINES;
+ "%destructor" return PERCENT_DESTRUCTOR;
+ "%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" return PERCENT_INITIAL_ACTION;
- "%glr-parser" return PERCENT_GLR_PARSER;
- "%left" return PERCENT_LEFT;
- "%lex-param" return PERCENT_LEX_PARAM;
- "%locations" return PERCENT_LOCATIONS;
- "%merge" return PERCENT_MERGE;
- "%name"[-_]"prefix" return PERCENT_NAME_PREFIX;
- "%no"[-_]"default"[-_]"prec" return PERCENT_NO_DEFAULT_PREC;
- "%no"[-_]"lines" return PERCENT_NO_LINES;
- "%nonassoc" return PERCENT_NONASSOC;
- "%nondeterministic-parser" return PERCENT_NONDETERMINISTIC_PARSER;
- "%nterm" return PERCENT_NTERM;
- "%output" return PERCENT_OUTPUT;
- "%parse-param" return PERCENT_PARSE_PARAM;
- "%prec" return PERCENT_PREC;
- "%printer" return PERCENT_PRINTER;
- "%pure"[-_]"parser" return PERCENT_PURE_PARSER;
- "%require" return PERCENT_REQUIRE;
- "%right" return PERCENT_RIGHT;
- "%skeleton" return PERCENT_SKELETON;
- "%start" return PERCENT_START;
- "%start-header" return PERCENT_START_HEADER;
- "%term" return PERCENT_TOKEN;
- "%token" return PERCENT_TOKEN;
- "%token"[-_]"table" return PERCENT_TOKEN_TABLE;
- "%type" return PERCENT_TYPE;
- "%union" return PERCENT_UNION;
- "%verbose" return PERCENT_VERBOSE;
- "%yacc" return PERCENT_YACC;
+ "%initial-action" return PERCENT_INITIAL_ACTION;
+ "%glr-parser" return PERCENT_GLR_PARSER;
+ "%language" return PERCENT_LANGUAGE;
+ "%left" return PERCENT_LEFT;
+ "%lex-param" return PERCENT_LEX_PARAM;
+ "%locations" return PERCENT_LOCATIONS;
+ "%merge" return PERCENT_MERGE;
+ "%name"[-_]"prefix" return PERCENT_NAME_PREFIX;
+ "%no"[-_]"default"[-_]"prec" return PERCENT_NO_DEFAULT_PREC;
+ "%no"[-_]"lines" return PERCENT_NO_LINES;
+ "%nonassoc" return PERCENT_NONASSOC;
+ "%nondeterministic-parser" return PERCENT_NONDETERMINISTIC_PARSER;
+ "%nterm" return PERCENT_NTERM;
+ "%output" return PERCENT_OUTPUT;
+ "%parse-param" return PERCENT_PARSE_PARAM;
+ "%prec" return PERCENT_PREC;
+ "%printer" return PERCENT_PRINTER;
+ "%pure"[-_]"parser" return PERCENT_PURE_PARSER;
+ "%require" return PERCENT_REQUIRE;
+ "%right" return PERCENT_RIGHT;
+ "%skeleton" return PERCENT_SKELETON;
+ "%start" return PERCENT_START;
+ "%term" return PERCENT_TOKEN;
+ "%token" return PERCENT_TOKEN;
+ "%token"[-_]"table" return PERCENT_TOKEN_TABLE;
+ "%type" return PERCENT_TYPE;
+ "%union" return PERCENT_UNION;
+ "%verbose" return PERCENT_VERBOSE;
+ "%yacc" return PERCENT_YACC;
{directive} {
complain_at (*loc, _("invalid directive: %s"), quote (yytext));
@@ -216,6 +211,8 @@ splice (\\[ \f\t\v]*\n)*
"=" return EQUAL;
"|" return PIPE;
";" return SEMICOLON;
+ "<*>" return TYPE_TAG_ANY;
+ "<>" return TYPE_TAG_NONE;
{id} {
val->uniqstr = uniqstr_new (yytext);
@@ -344,15 +341,23 @@ splice (\\[ \f\t\v]*\n)*
{
- "\"" {
+ "\""|"\n" {
+ if (yytext[0] == '\n')
+ unexpected_newline (token_start, "\"");
+ STRING_FINISH;
+ loc->start = token_start;
+ val->chars = last_string;
+ BEGIN INITIAL;
+ return STRING;
+ }
+ <> {
+ unexpected_eof (token_start, "\"");
STRING_FINISH;
loc->start = token_start;
val->chars = last_string;
BEGIN INITIAL;
return STRING;
}
- \n unexpected_newline (token_start, "\""); BEGIN INITIAL;
- <> unexpected_eof (token_start, "\""); BEGIN INITIAL;
}
/*----------------------------------------------------------.
@@ -362,7 +367,9 @@ splice (\\[ \f\t\v]*\n)*
{
- "'" {
+ "'"|"\n" {
+ if (yytext[0] == '\n')
+ unexpected_newline (token_start, "'");
STRING_GROW;
STRING_FINISH;
loc->start = token_start;
@@ -371,8 +378,18 @@ splice (\\[ \f\t\v]*\n)*
BEGIN INITIAL;
return CHAR;
}
- \n unexpected_newline (token_start, "'"); BEGIN INITIAL;
- <> unexpected_eof (token_start, "'"); BEGIN INITIAL;
+ <> {
+ unexpected_eof (token_start, "'");
+ STRING_FINISH;
+ loc->start = token_start;
+ if (strlen (last_string) > 1)
+ val->character = last_string[1];
+ else
+ val->character = last_string[0];
+ STRING_FREE;
+ BEGIN INITIAL;
+ return CHAR;
+ }
}
@@ -508,8 +525,7 @@ splice (\\[ \f\t\v]*\n)*
{
STRING_FINISH;
loc->start = code_start;
- val->chars = last_string;
- gram_last_braced_code_loc = *loc;
+ val->code = last_string;
BEGIN INITIAL;
return BRACED_CODE;
}
@@ -519,7 +535,14 @@ splice (\\[ \f\t\v]*\n)*
(as `<' `<%'). */
"<"{splice}"<" STRING_GROW;
- <> unexpected_eof (code_start, "}"); BEGIN INITIAL;
+ <> {
+ unexpected_eof (code_start, "}");
+ STRING_FINISH;
+ loc->start = code_start;
+ val->code = last_string;
+ BEGIN INITIAL;
+ return BRACED_CODE;
+ }
}
@@ -537,7 +560,14 @@ splice (\\[ \f\t\v]*\n)*
return PROLOGUE;
}
- <> unexpected_eof (code_start, "%}"); BEGIN INITIAL;
+ <> {
+ unexpected_eof (code_start, "%}");
+ STRING_FINISH;
+ loc->start = code_start;
+ val->chars = last_string;
+ BEGIN INITIAL;
+ return PROLOGUE;
+ }
}
@@ -772,5 +802,5 @@ gram_scanner_free (void)
{
obstack_free (&obstack_for_string, 0);
/* Reclaim Flex's buffers. */
- yy_delete_buffer (YY_CURRENT_BUFFER);
+ yylex_destroy ();
}