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Venice, a Lisp implemented in Java

There is a newer version: 1.12.35

/*   __    __         _
 *   \ \  / /__ _ __ (_) ___ ___
 *    \ \/ / _ \ '_ \| |/ __/ _ \
 *     \  /  __/ | | | | (_|  __/
 *      \/ \___|_| |_|_|\___\___|
 *
 *
 * Copyright 2017-2024 Venice
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.github.jlangch.venice.impl.util.transducer;

import com.github.jlangch.venice.impl.Printer;
import com.github.jlangch.venice.impl.types.IDeref;
import com.github.jlangch.venice.impl.types.VncJavaObject;
import com.github.jlangch.venice.impl.types.VncVal;
import com.github.jlangch.venice.impl.types.util.Coerce;
import com.github.jlangch.venice.impl.types.util.Types;


public class Reduced implements IDeref {

    public Reduced(final VncVal val) {
        this.val = val;
    }

    @Override
    public VncVal deref() {
        return val;
    }

    @Override
    public String toString() {
        return toString(true);
    }

    public String toString(final boolean print_readably) {
        return "(reduced :value " + Printer.pr_str(val, print_readably) + ")";
    }


    public static boolean isReduced(final VncVal val) {
        return Types.isVncJavaObject(val, Reduced.class);
    }

    public static VncVal reduced(final VncVal val) {
        return new VncJavaObject(new Reduced(val));
    }

    public static VncVal unreduced(final VncVal val) {
        return Types.isVncJavaObject(val, Reduced.class)
                ? Coerce.toVncJavaObject(val, Reduced.class).deref()
                : val;
    }


    private final VncVal val;
}