package org.matheclipse.core.builtin.function;

import org.matheclipse.core.eval.exception.ThrowException;
import org.matheclipse.core.eval.exception.Validate;
import org.matheclipse.core.eval.interfaces.AbstractCoreFunctionEvaluator;
import org.matheclipse.core.expression.F;
import org.matheclipse.core.interfaces.IAST;
import org.matheclipse.core.interfaces.IExpr;
import org.matheclipse.core.interfaces.ISymbol;

public class Throw extends AbstractCoreFunctionEvaluator {

	public Throw() {
		super();
	}

	@Override
	public IExpr evaluate(final IAST ast) {
		if (ast.size() == 2) {
			throw new ThrowException(F.eval(ast.arg1()));
		}
		Validate.checkSize(ast, 2);

		return null;
	}

	@Override
	public void setUp(final ISymbol symbol) {
		symbol.setAttributes(ISymbol.HOLDALL);
	}

}