/*
 * Copyright (C) 2017 Apple Inc. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
 */
"use strict";

class ConstexprTypeParameter extends Value {
    constructor(origin, name, type)
    {
        super();
        this._origin = origin;
        this._name = name;
        this._type = type;
    }
    
    get origin() { return this._origin; }
    get name() { return this._name; }
    get type() { return this._type; }
    get isConstexpr() { return true; }
    get isUnifiable() { return true; }
    get varIsLValue() { return false; }
    
    typeVariableUnify(unificationContext, other)
    {
        if (!(other instanceof Value))
            return false;

        if (!this.type.unify(unificationContext, other.type))
            return false;
        
        return this._typeVariableUnifyImpl(unificationContext, other);
    }
    
    unifyImpl(unificationContext, other)
    {
        return this.typeVariableUnify(unificationContext, other);
    }
    
    verifyAsArgument(unificationContext)
    {
        return {result: true};
    }
    
    verifyAsParameter(unificationContext)
    {
        return {result: true};
    }
    
    toString()
    {
        return this.type + " " + this.name;
    }
}