/*
* 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.prattparser.CriticalParserError;
import de.halirutan.mathematica.parsing.prattparser.MathematicaParser;
import static de.halirutan.mathematica.parsing.MathematicaElementTypes.*;
/**
* Parselet for symbols (identifier). Here, I currently parse not only simple identifiers like Sqrt, variable or
* $MaxRecursion. Additionally, I parse slot expressions like #1, ## or #abc into symbols and I parse stringified
* expressions like the rhs of << into one STRINGIFIED_SYMBOL_EXPRESSION node.
*
* @author patrick (3/27/13)
*/
public class SymbolParselet implements PrefixParselet {
private final int myPrecedence;
public SymbolParselet(int precedence) {
this.myPrecedence = precedence;
}
@Override
public MathematicaParser.Result parse(MathematicaParser parser) throws CriticalParserError {
PsiBuilder.Marker symbolMark = parser.mark();
IElementType finalExpressionType;
final IElementType tokenType = parser.getTokenType();
if (tokenType.equals(IDENTIFIER)) {
finalExpressionType = SYMBOL_EXPRESSION;
} else if (tokenType.equals(STRINGIFIED_IDENTIFIER)) {
finalExpressionType = STRINGIFIED_SYMBOL_EXPRESSION;
} else {
return MathematicaParser.notParsed();
}
parser.advanceLexer();
symbolMark.done(finalExpressionType);
return MathematicaParser.result(symbolMark, finalExpressionType, true);
}
public int getPrecedence() {
return myPrecedence;
}
}