Tools/WebGPUShadingLanguageRI/PtrType.js

/*
 * 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
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 * (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 PtrType extends ReferenceType {
    get isPtr() { return true; }
    
    unifyImpl(unificationContext, other)
    {
        if (!other.isPtr)
            return false;
        if (this.addressSpace != other.addressSpace)
            return false;
        return this.elementType.unify(unificationContext, other.elementType);
    }
    
    argumentForAndOverload(origin, value)
    {
        throw new WTypeError(origin.originString, "Pointer subscript is not valid");
    }
    argumentTypeForAndOverload(origin, type)
    {
        throw new WTypeError(origin.originString, "Pointer subscript is not valid");
    }
    returnTypeFromAndOverload(origin)
    {
        return this.elementType;
    }

    toString()
    {
        return this.elementType + "* " + this.addressSpace;
    }
}