/*

 * Copyright 2016 Google Inc.

 *

 * Use of this source code is governed by a BSD-style license that can be

 * found in the LICENSE file.

 */

#ifndef SKSL_EXTENSION

#define SKSL_EXTENSION

#include "src/sksl/SkSLPosition.h"

#include "src/sksl/ir/SkSLIRNode.h"

#include "src/sksl/ir/SkSLProgramElement.h"

#include <memory>

#include <string>

#include <string_view>

namespace SkSL {

class Context;

/**

 * #extension <name> : enable

 */

class Extension final : public ProgramElement {

public:

    inline static constexpr Kind kIRNodeKind = Kind::kExtension;

    Extension(Position pos, std::string_view name)

            : INHERITED(pos, kIRNodeKind)

            , fName(name) {}

    std::string_view name() const {

        return fName;

    }

    // Reports errors via ErrorReporter. This may return null even if no error occurred;

    // in particular, if the behavior text is `disabled`, no ProgramElement is necessary.

    static std::unique_ptr<Extension> Convert(const Context& context,

                                              Position pos,

                                              std::string_view name,

                                              std::string_view behaviorText);

    // Asserts if an error is detected.

    static std::unique_ptr<Extension> Make(const Context& context,

                                           Position pos,

                                           std::string_view name);

    std::string description() const override {

        return "#extension " + std::string(this->name()) + " : enable";

    }

private:

    std::string_view fName;

    using INHERITED = ProgramElement;

};

}  // namespace SkSL

#endif