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* Licensed under the Apache License, Version 2.0 (the "License"); *
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* 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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package net.ion.rosetta;
import net.ion.rosetta.functors.Map;
/**
* Runs a {@link Parser} and then maps the parser result to another {@code Parser} object, the returned {@code Parser} object is then executed as the next step.
*
* @author Ben Yu
*/
final class BindNextParser<From, To> extends Parser<To> {
private final Parser<? extends From> parser;
private final Map<? super From, ? extends Parser<? extends To>> map;
BindNextParser(Parser<? extends From> parser, Map<? super From, ? extends Parser<? extends To>> next) {
this.map = next;
this.parser = parser;
}
@Override
boolean apply(ParseContext ctxt) {
if (!parser.run(ctxt))
return false;
return Parsers.runNext(ctxt, map);
}
@Override
public String toString() {
return map.toString();
}
}