//
// Copyright (C) 2017 LunarG, Inc.
// Copyright (C) 2018 Google, 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:
//
//    Redistributions of source code must retain the above copyright
//    notice, this list of conditions and the following disclaimer.
//
//    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.
//
//    Neither the name of 3Dlabs Inc. Ltd. nor the names of its
//    contributors may be used to endorse or promote products derived
//    from this software without specific prior written permission.
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// "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 THE
// COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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// BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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// POSSIBILITY OF SUCH DAMAGE.
//

#ifndef _ATTRIBUTE_INCLUDED_
#define _ATTRIBUTE_INCLUDED_

#include "../Include/Common.h"
#include "../Include/ConstantUnion.h"

namespace glslang {

    enum TAttributeType {
        EatNone,
        EatAllow_uav_condition,
        EatBranch,
        EatCall,
        EatDomain,
        EatEarlyDepthStencil,
        EatFastOpt,
        EatFlatten,
        EatForceCase,
        EatInstance,
        EatMaxTessFactor,
        EatNumThreads,
        EatMaxVertexCount,
        EatOutputControlPoints,
        EatOutputTopology,
        EatPartitioning,
        EatPatchConstantFunc,
        EatPatchSize,
        EatUnroll,
        EatLoop,
        EatBinding,
        EatGlobalBinding,
        EatLocation,
        EatInputAttachment,
        EatBuiltIn,
        EatPushConstant,
        EatConstantId,
        EatDependencyInfinite,
        EatDependencyLength
    };

    class TIntermAggregate;

    struct TAttributeArgs {
        TAttributeType name;
        const TIntermAggregate* args;

        // Obtain attribute as integer
        // Return false if it cannot be obtained
        bool getInt(int& value, int argNum = 0) const;

        // Obtain attribute as string, with optional to-lower transform
        // Return false if it cannot be obtained
        bool getString(TString& value, int argNum = 0, bool convertToLower = true) const;

        // How many arguments were provided to the attribute?
        int size() const;

    protected:
        const TConstUnion* getConstUnion(TBasicType basicType, int argNum) const;
    };

    typedef TList<TAttributeArgs> TAttributes;

} // end namespace glslang

#endif // _ATTRIBUTE_INCLUDED_