SkSLFieldSymbol.h

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/*
 * 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_FIELD
#define SKSL_FIELD
 
#include "src/sksl/ir/SkSLModifierFlags.h"
#include "src/sksl/ir/SkSLSymbol.h"
#include "src/sksl/ir/SkSLType.h"
#include "src/sksl/ir/SkSLVariable.h"
 
namespace SkSL {
 
/**
 * A symbol which should be interpreted as a field access. Fields are added to the symboltable
 * whenever a bare reference to an identifier should refer to a struct field; in GLSL, this is the
 * result of declaring anonymous interface blocks.
 */
class FieldSymbol final : public Symbol {
public:
    inline static constexpr Kind kIRNodeKind = Kind::kField;
 
    FieldSymbol(Position pos, const Variable* owner, int fieldIndex)
            : INHERITED(pos, kIRNodeKind, owner->type().fields()[fieldIndex].fName,
                        owner->type().fields()[fieldIndex].fType)
            , fOwner(owner)
            , fFieldIndex(fieldIndex) {}
 
    int fieldIndex() const {
        return fFieldIndex;
    }
 
    const Variable& owner() const {
        return *fOwner;
    }
 
    std::string description() const override {
        return this->owner().name().empty()
                       ? std::string(this->name())
                       : (this->owner().description() + "." + std::string(this->name()));
    }
 
private:
    const Variable* fOwner;
    int fFieldIndex;
 
    using INHERITED = Symbol;
};
 
} // namespace SkSL
 
#endif