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* Licensed under the Apache License, Version 2.0 (the "License"); *
* you may not use this file except in compliance with the License. *
* You may obtain a copy of the License at *
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* http://www.apache.org/licenses/LICENSE-2.0 *
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* distributed under the License is distributed on an "AS IS" BASIS, *
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package net.ion.rosetta;
final class OrParser<T> extends Parser<T> {
private final Parser<? extends T>[] alternatives;
OrParser(Parser<? extends T>... alternatives) {
this.alternatives = alternatives;
}
@Override
boolean apply(ParseContext ctxt) {
final Object result = ctxt.result;
final int at = ctxt.at;
final int step = ctxt.step;
for (Parser<? extends T> p : alternatives) {
if (p.run(ctxt)) {
return true;
}
ctxt.set(step, at, result);
}
// set the index to the most relevant error so far.
ctxt.setAt(step, at);
return false;
}
@Override
public String toString() {
return "or";
}
}