/*
 * Copyright (c) 2013 Oracle and/or its affiliates. All rights reserved. This
 * code is released under a tri EPL/GPL/LGPL license. You can use it,
 * redistribute it and/or modify it under the terms of the:
 *
 * Eclipse Public License version 1.0
 * GNU General Public License version 2
 * GNU Lesser General Public License version 2.1
 */
package com.oracle.truffle.ruby.nodes.core;

import com.oracle.truffle.api.*;
import com.oracle.truffle.api.dsl.*;
import com.oracle.truffle.ruby.runtime.*;
import com.oracle.truffle.ruby.runtime.core.*;

@CoreClass(name = "FalseClass")
public abstract class FalseClassNodes {

    @CoreMethod(names = "!", needsSelf = false, maxArgs = 0)
    public abstract static class NotNode extends CoreMethodNode {

        public NotNode(RubyContext context, SourceSection sourceSection) {
            super(context, sourceSection);
        }

        public NotNode(NotNode prev) {
            super(prev);
        }

        @Specialization
        public boolean not() {
            return true;
        }

    }

    @CoreMethod(names = {"==", "===", "=~"}, needsSelf = false, minArgs = 1, maxArgs = 1)
    public abstract static class EqualNode extends CoreMethodNode {

        public EqualNode(RubyContext context, SourceSection sourceSection) {
            super(context, sourceSection);
        }

        public EqualNode(EqualNode prev) {
            super(prev);
        }

        @Specialization
        public boolean equal(boolean other) {
            return !other;
        }

        @Specialization
        public boolean equal(Object other) {
            return other instanceof Boolean && !((boolean) other);
        }

    }

    @CoreMethod(names = "^", needsSelf = false, minArgs = 1, maxArgs = 1)
    public abstract static class XorNode extends CoreMethodNode {

        public XorNode(RubyContext context, SourceSection sourceSection) {
            super(context, sourceSection);
        }

        public XorNode(XorNode prev) {
            super(prev);
        }

        @Specialization
        public boolean xor(boolean other) {
            return false ^ other;
        }

    }

    @CoreMethod(names = "to_s", needsSelf = false, maxArgs = 0)
    public abstract static class ToSNode extends CoreMethodNode {

        public ToSNode(RubyContext context, SourceSection sourceSection) {
            super(context, sourceSection);
        }

        public ToSNode(ToSNode prev) {
            super(prev);
        }

        @Specialization
        public RubyString toS() {
            return getContext().makeString("false");
        }

    }

}