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package bjc.utils.parserutils.pratt.commands;
import bjc.utils.data.ITree;
import bjc.utils.data.Tree;
import bjc.utils.parserutils.ParserException;
import bjc.utils.parserutils.pratt.ParserContext;
import bjc.utils.parserutils.pratt.Token;
/**
* A binary operator.
*
* @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 abstract class BinaryCommand<K, V, C> extends BinaryPostCommand<K, V, C> {
/**
* Create a new binary operator with the specified precedence.
*
* @param precedence
* The precedence of the operator.
*/
public BinaryCommand(int precedence) {
super(precedence);
}
protected abstract int rightBinding();
@Override
public ITree<Token<K, V>> denote(ITree<Token<K, V>> operand, Token<K, V> operator, ParserContext<K, V, C> ctx)
throws ParserException {
ITree<Token<K, V>> opr = ctx.parse.parseExpression(rightBinding(), ctx.tokens, ctx.state, false);
return new Tree<>(operator, operand, opr);
}
}
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