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package bjc.pratt.commands;
import bjc.pratt.InitialCommand;
import bjc.pratt.ParserContext;
import bjc.pratt.Token;
import bjc.utils.data.ITree;
import bjc.utils.parserutils.ParserException;
/**
* A command that represents a specific tree.
*
* @author bjculkin
*
* @param <K>
* The key type of the tokens.
*
* @param <V>
* The value type of the tokens.
*
* @param <C>
* The state type of the parser.
*/
public class ConstantCommand<K, V, C> implements InitialCommand<K, V, C> {
private ITree<Token<K, V>> val;
/**
* Create a new constant.
*
* @param con
* The tree this constant represents.
*/
public ConstantCommand(ITree<Token<K, V>> con) {
val = con;
}
@Override
public ITree<Token<K, V>> denote(Token<K, V> operator, ParserContext<K, V, C> ctx) throws ParserException {
return val;
}
}
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