/*
 * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */
package com.oracle.truffle.sl.builtins;

import com.oracle.truffle.api.*;
import com.oracle.truffle.api.dsl.*;
import com.oracle.truffle.api.nodes.*;
import com.oracle.truffle.api.source.*;
import com.oracle.truffle.sl.*;
import com.oracle.truffle.sl.runtime.*;

/**
 * Asserts a given value to be <code>false</code> and throws an {@link AssertionError} if the value
 * was <code>true</code>.
 */
@NodeInfo(shortName = "assertFalse")
public abstract class SLAssertFalseBuiltin extends SLBuiltinNode {

    public SLAssertFalseBuiltin() {
        super(SourceSection.createUnavailable("SL builtin", "assertFalse"));
    }

    @Specialization
    public boolean doAssert(boolean value, String message) {
        if (value) {
            CompilerDirectives.transferToInterpreter();
            throw new SLAssertionError(message == null ? "" : message);
        }
        return value;
    }

    @Specialization
    public boolean doAssertNull(boolean value, @SuppressWarnings("unused") SLNull message) {
        return doAssert(value, null);
    }

}