/*******************************************************************************
* LastCalc - The last calculator you'll ever need
* Copyright (C) 2011, 2012 Uprizer Labs LLC
*
* This program is free software: you can redistribute it and/or modify it
* under the terms of the GNU Affero General Public License as published
* by 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, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR
* PURPOSE. See the GNU Affero General Public License for more
* details.
******************************************************************************/
package com.lastcalc.parsers;
import com.lastcalc.TokenList;
import com.lastcalc.parsers.UserDefinedParserParser.UserDefinedParser;
public class UDPApplier extends Parser {
private static final long serialVersionUID = -5412238263419670848L;
private static TokenList template = TokenList.createD("apply", UserDefinedParser.class, "to");
@Override
public TokenList getTemplate() {
return template;
}
@Override
public ParseResult parse(final TokenList tokens, final int templatePos, final ParserContext context) {
final UserDefinedParser function = (UserDefinedParser) tokens.get(templatePos + 1);
if (2 + templatePos + function.getTemplate().size() > tokens.size())
return ParseResult.fail();
final TokenList input = tokens.subList(templatePos + 3, templatePos + 3 + function.getTemplate().size());
if (function.matchTemplate(input) != 0)
return ParseResult.fail();
final ParseResult parse = function.parse(input, 0, context);
if (parse.isSuccess())
return ParseResult.success(tokens.replaceWithTokenList(templatePos, templatePos + 3
+ function.getTemplate().size(), parse.output));
else
return ParseResult.fail();
}
@Override
public int hashCode() {
return "UDPApplier".hashCode();
}
@Override
public boolean equals(final Object obj) {
return obj instanceof UDPApplier;
}
}