package org.lambdanantes.lcgoji.ast;

import lombok.AccessLevel;
import lombok.AllArgsConstructor;
import lombok.EqualsAndHashCode;

import static org.lambdanantes.lcgoji.ast.Var.var;

@AllArgsConstructor(access = AccessLevel.PROTECTED)
@EqualsAndHashCode
public final class Abs implements Term {

    public static final Abs IDENTITY = λ("x", var("x"));

    public String arg;
    public Term body;

    public static Abs λ(String arg, Term body) {
        return new Abs(arg, body);
    }

    @Override
    public String toString() {
        return "λ" + arg + "." + body;
    }
}