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• Not.java

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com.github.dakusui.logias.lisp.func.util.calc.Not Maven / Gradle / Ivy

package com.github.dakusui.logias.lisp.func.util.calc;

import com.github.dakusui.logias.lisp.Context;
import com.github.dakusui.logias.lisp.func.Func;
import com.github.dakusui.logias.lisp.s.Sexp;

public class Not extends Func {

	@Override
	public Sexp invoke(Context context, Sexp... params) {
		if (params == null || params.length != 1) {
			throw new RuntimeException("This function can take only one parameter.");
		}
		return Sexp.nil.equals(params[0]) ? Sexp.T : Sexp.nil;
	}

}