/*
* Copyright (c) 2013 Patrick Scheibe
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
package de.halirutan.mathematica.parsing.prattparser.parselets;
import com.intellij.lang.PsiBuilder;
import com.intellij.psi.tree.IElementType;
import de.halirutan.mathematica.parsing.MathematicaElementTypes;
import de.halirutan.mathematica.parsing.ParserBundle;
import de.halirutan.mathematica.parsing.prattparser.CriticalParserError;
import de.halirutan.mathematica.parsing.prattparser.MathematicaParser;
/**
* Parselet for Pattern.
*
* @author patrick (7/1/13)
*/
public class PatternParselet implements InfixParselet {
private final int myPrecedence;
public PatternParselet(int precedence) {
this.myPrecedence = precedence;
}
@Override
public MathematicaParser.Result parse(MathematicaParser parser, MathematicaParser.Result left) throws CriticalParserError {
if (!left.isValid()) {
return MathematicaParser.notParsed();
}
PsiBuilder.Marker patternOptional = left.getMark().precede();
parser.advanceLexer();
MathematicaParser.Result result = parser.parseExpression(myPrecedence);
IElementType expressionType = left.getToken().equals(MathematicaElementTypes.SYMBOL_EXPRESSION) ?
MathematicaElementTypes.PATTERN_EXPRESSION : MathematicaElementTypes.OPTIONAL_EXPRESSION;
if (!result.isParsed()) {
parser.error(ParserBundle.message("Pattern.error"));
}
patternOptional.done(expressionType);
return MathematicaParser.result(patternOptional, expressionType, result.isParsed());
}
@Override
public int getMyPrecedence() {
return myPrecedence;
}
}