SkSLExtension.h

Go to the documentation of this file.

/*
 * 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