23 lines
553 B
Java
23 lines
553 B
Java
package function.builtin.predicate;
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import function.*;
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import sexpression.*;
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public class ATOM extends LispFunction {
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private ArgumentValidator argumentValidator;
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public ATOM() {
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this.argumentValidator = new ArgumentValidator("ATOM");
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this.argumentValidator.setExactNumberOfArguments(1);
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}
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public SExpression call(Cons argumentList) {
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argumentValidator.validate(argumentList);
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SExpression argument = argumentList.getFirst();
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return argument.isAtom() ? Symbol.T : Nil.getInstance();
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}
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}
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