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/*
Copyright 2007 David Nolden <david.nolden.kdevelop@art-master.de>
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.
*/
#include <language/duchain/stringhelpers.h>
#include <language/duchain/safetycounter.h>
#include <QString>
#include <QChar>
#include <QStringList>
namespace Utils {
bool parenFits( QChar c1, QChar c2 ) {
if( c1 == '<' && c2 == '>' ) return true;
else if( c1 == '(' && c2 == ')' ) return true;
else if( c1 == '[' && c2 == ']' ) return true;
else if( c1 == '{' && c2 == '}' ) return true;
else
return false;
}
bool isParen( QChar c1 ) {
if( c1 == '<' || c1 == '>' ) return true;
else if( c1 == '(' || c1 == ')' ) return true;
else if( c1 == '[' || c1 == ']' ) return true;
else if( c1 == '{' || c1 == '}' ) return true;
else
return false;
}
bool isTypeParen( QChar c1 ) {
if( c1 == '<' || c1 == '>' ) return true;
else
return false;
}
bool isTypeOpenParen( QChar c1 ) {
if( c1 == '<' ) return true;
else
return false;
}
bool isTypeCloseParen( QChar c1 ) {
if( c1 == '>' ) return true;
else
return false;
}
bool isLeftParen( QChar c1 ) {
if( c1 == '<' ) return true;
else if( c1 == '(' ) return true;
else if( c1 == '[' ) return true;
else if( c1 == '{' ) return true;
else
return false;
}
enum { T_ACCESS, T_PAREN, T_BRACKET, T_IDE, T_UNKNOWN, T_TEMP };
int expressionAt( const QString& text, int index ) {
if( index == 0 )
return 0;
int last = T_UNKNOWN;
int start = index;
--index;
while ( index > 0 ) {
while ( index > 0 && text[ index ].isSpace() ) {
--index;
}
QChar ch = text[ index ];
QString ch2 = text.mid( index - 1, 2 );
if ( ( last != T_IDE ) && ( ch.isLetterOrNumber() || ch == '_' ) ) {
while ( index > 0 && ( text[ index ].isLetterOrNumber() || text[ index ] == '_' ) ) {
--index;
}
last = T_IDE;
} else if ( last != T_IDE && ch == ')' ) {
int count = 0;
while ( index > 0 ) {
QChar ch = text[ index ];
if ( ch == '(' ) {
++count;
} else if ( ch == ')' ) {
--count;
}
--index;
if ( count == 0 ) {
//index;
last = T_PAREN;
break;
}
}
} else if ( last != T_IDE && ch == '>' && ch2 != "->" ) {
int count = 0;
while ( index > 0 ) {
QChar ch = text[ index ];
if ( ch == '<' ) {
++count;
} else if ( ch == '>' ) {
--count;
} else if ( count == 0 ) {
//--index;
last = T_TEMP;
break;
}
--index;
}
} else if ( ch == ']' ) {
int count = 0;
while ( index > 0 ) {
QChar ch = text[ index ];
if ( ch == '[' ) {
++count;
} else if ( ch == ']' ) {
--count;
} else if ( count == 0 ) {
//--index;
last = T_BRACKET;
break;
}
--index;
}
} else if ( ch == '.' ) {
--index;
last = T_ACCESS;
} else if ( ch2 == "::" ) {
index -= 2;
last = T_ACCESS;
} else if ( ch2 == "->" ) {
index -= 2;
last = T_ACCESS;
} else {
if ( start > index ) {
++index;
}
last = T_UNKNOWN;
break;
}
}
///If we're at the first item, the above algorithm cannot be used safely,
///so just determine whether the sign is valid for the beginning of an expression, if it isn't reject it.
if ( index == 0 && start > index && !( text[ index ].isLetterOrNumber() || text[ index ] == '_' || text[ index ] == ':' ) ) {
++index;
}
return index;
}
}
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