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* Copyright (C) Codehaus.org *
* ------------------------------------------------------------------------- *
* 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 *
* *
* http://www.apache.org/licenses/LICENSE-2.0 *
* *
* Unless required by applicable law or agreed to in writing, software *
* distributed under the License is distributed on an "AS IS" BASIS, *
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. *
* See the License for the specific language governing permissions and *
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*****************************************************************************/
package net.ion.rosetta;
final class AtomicParser<T> extends Parser<T> {
private final Parser<T> p;
AtomicParser(Parser<T> p) {
this.p = p;
}
@Override
boolean apply(ParseContext ctxt) {
int at = ctxt.at;
int step = ctxt.step;
boolean r = p.run(ctxt);
if (r)
ctxt.step = step + 1;
else
ctxt.setAt(step, at);
return r;
}
@Override
public String toString() {
return p.toString();
}
}