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/*
* Copyright (c) 2002-2003 Jesper K. Pedersen <blackie@kde.org>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License version 2 as published by the Free Software Foundation.
*
* This library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
**/
%{
#ifdef QT_ONLY
#include "compat.h"
#else
#include <klocale.h>
#include <kmessagebox.h>
#endif
#include <qstring.h>
#include <stdlib.h>
#include "regexp.h"
#include "textregexp.h"
#include "textrangeregexp.h"
#include "repeatregexp.h"
#include "lookaheadregexp.h"
#include "concregexp.h"
#include "altnregexp.h"
#include "positionregexp.h"
#include "dotregexp.h"
#include "compoundregexp.h"
extern int yylex();
extern void setParseData( QString str );
int yyerror (const char *);
void setParseResult( RegExp* );
RegExp* parseQtRegExp( QString qstr, bool* ok );
static RegExp* parseResult;
static int _index;
%}
%union {
struct {
int min;
int max;
} range;
int backRef;
RegExp* regexp;
char ch;
}
%token TOK_Dot
%token TOK_Dollar
%token TOK_Carat
%token TOK_MagicLeftParent
%token TOK_PosLookAhead
%token TOK_NegLookAhead
%token TOK_LeftParen
%token TOK_RightParent
%token TOK_Bar
%token TOK_Quantifier
%token TOK_BackRef
%token TOK_CharClass
%token TOK_Char
%token TOK_EscapeChar
%token TOK_PosWordChar
%token TOK_PosNonWordChar
%start regexp
%%
empty : /* nothing */ ;
regexp : expression { setParseResult( $<regexp>1) ; }
| empty { setParseResult( new ConcRegExp( false ) ); }
;
expression : expression TOK_Bar term {
if ( dynamic_cast<AltnRegExp*>( $<regexp>1 ) ) {
$<regexp>$ = $<regexp>1;
}
else {
$<regexp>$ = new AltnRegExp( false );
dynamic_cast<AltnRegExp*>( $<regexp>$ )->addRegExp( $<regexp>1 );
}
dynamic_cast<AltnRegExp*>( $<regexp>$ )->addRegExp( $<regexp>3 );
}
| term { $<regexp>$ = $<regexp>1; }
| expression TOK_Bar {
if ( dynamic_cast<AltnRegExp*>( $<regexp>1 ) ) {
$<regexp>$ = $<regexp>1;
}
else {
$<regexp>$ = new AltnRegExp( false );
dynamic_cast<AltnRegExp*>( $<regexp>$ )->addRegExp( $<regexp>1 );
}
dynamic_cast<AltnRegExp*>( $<regexp>$ )->addRegExp( new TextRegExp( false, QString::fromLatin1("") ) );
}
| TOK_Bar term {
$<regexp>$ = new AltnRegExp( false );
dynamic_cast<AltnRegExp*>( $<regexp>$ )->addRegExp( new TextRegExp( false, QString::fromLatin1("") ) );
dynamic_cast<AltnRegExp*>( $<regexp>$ )->addRegExp( $<regexp>2 );
}
| TOK_Bar { $<regexp>$ = new AltnRegExp( false ); }
;
term : term factor {
RegExp* last = dynamic_cast<ConcRegExp*>( $<regexp>1 )->lastRegExp();
TextRegExp *reg1, *reg2;
if ( last && ( reg1 = dynamic_cast<TextRegExp*>( last ) ) &&
( reg2 = dynamic_cast<TextRegExp*>( $<regexp>2 ) ) ) {
reg1->append( reg2->text() );
delete reg2;
}
else {
dynamic_cast<ConcRegExp*>($<regexp>$)->addRegExp( $<regexp>2 );
}
$<regexp>$ = $<regexp>1;
}
| factor {
ConcRegExp* reg = new ConcRegExp( false );
reg->addRegExp( $<regexp>1 );
$<regexp>$ = reg;
}
;
factor : atom TOK_Quantifier {
$<regexp>$ = new RepeatRegExp( false, $<range>2.min, $<range>2.max, $<regexp>1 );
}
| atom { $<regexp>$ = $<regexp>1; }
;
atom : TOK_LeftParen expression TOK_RightParent {
$<regexp>$ = $<regexp>2;
}
| TOK_MagicLeftParent expression TOK_RightParent { $<regexp>$ = $<regexp>2; }
| TOK_PosLookAhead expression TOK_RightParent {
$<regexp>$ = new LookAheadRegExp( false, LookAheadRegExp::POSITIVE, $<regexp>2 );
}
| TOK_NegLookAhead expression TOK_RightParent {
$<regexp>$ = new LookAheadRegExp( false, LookAheadRegExp::NEGATIVE, $<regexp>2 );
}
| TOK_CharClass { $<regexp>$ = $<regexp>1; }
| char { $<regexp>$ = $<regexp>1; }
| TOK_Dollar { $<regexp>$ = new PositionRegExp( false, PositionRegExp::ENDLINE ); }
| TOK_Carat { $<regexp>$ = new PositionRegExp( false, PositionRegExp::BEGLINE ); }
| TOK_Dot { $<regexp>$ = new DotRegExp( false ); }
| TOK_BackRef {
QString match = QString::fromLocal8Bit("\\%1").arg( $<backRef>1 );
$<regexp>$ = new TextRegExp( false, match );
KMessageBox::information(0,i18n("<qt>Back reference regular expressions are not supported.<p>"
"<tt>\\1</tt>, <tt>\\2</tt>, ... are <i>back references</i>, meaning they refer to "
"previous matches. "
"Unfortunately this is not supported in the current version of this editor.<p>"
"In the graphical area the text <b>%1</b> has been inserted. This is however "
"just a workaround to ensure that the application handles the regexp at all. "
"Therefore, as soon as you edit the regular expression in the graphical area, "
"the back reference will be replaced by matching the text <b>%2</b> literally.")
.arg( match ).arg( match ),
i18n("Back reference regular expressions not supported"),
QString::fromLocal8Bit("backReferenceNotSupported") );
}
| TOK_PosWordChar { $<regexp>$ = new PositionRegExp( false, PositionRegExp::WORDBOUNDARY ); }
| TOK_PosNonWordChar { $<regexp>$ = new PositionRegExp( false, PositionRegExp::NONWORDBOUNDARY ); }
;
char : TOK_Char {
if ( $<ch>1 == '{' || $<ch>1 == '}' || $<ch>1 == '[' || $<ch>1 == ']' || $<ch>1 == '\\' ) {
yyerror( "illigal character - needs escaping" );
}
$<regexp>$ = new TextRegExp( false, QString::fromLocal8Bit("%1").arg($<ch>1));
}
| TOK_EscapeChar { $<regexp>$ = new TextRegExp( false, QString::fromLocal8Bit("%1").arg($<ch>1)); }
;
%%
RegExp* parseQtRegExp( QString qstr, bool* ok ) {
_index = 0;
parseResult = 0;
setParseData( qstr );
yyparse();
*ok = ( yynerrs == 0 );
return parseResult;
}
void setParseResult( RegExp* regexp ) {
parseResult = regexp;
}
int yyerror(const char *) {
yynerrs++;
return 0;
}
|
