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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_FIELDACCESS
#define SKSL_FIELDACCESS
#include "SkSLExpression.h"
#include "SkSLUtil.h"
namespace SkSL {
/**
* An expression which extracts a field from a struct, as in 'foo.bar'.
*/
struct FieldAccess : public Expression {
enum OwnerKind {
kDefault_OwnerKind,
// this field access is to a field of an anonymous interface block (and thus, the field name
// is actually in global scope, so only the field name needs to be written in GLSL)
kAnonymousInterfaceBlock_OwnerKind
};
FieldAccess(std::unique_ptr<Expression> base, int fieldIndex,
OwnerKind ownerKind = kDefault_OwnerKind)
: INHERITED(base->fOffset, kFieldAccess_Kind, *base->fType.fields()[fieldIndex].fType)
, fBase(std::move(base))
, fFieldIndex(fieldIndex)
, fOwnerKind(ownerKind) {}
bool hasSideEffects() const override {
return fBase->hasSideEffects();
}
std::unique_ptr<Expression> clone() const override {
return std::unique_ptr<Expression>(new FieldAccess(fBase->clone(), fFieldIndex,
fOwnerKind));
}
String description() const override {
return fBase->description() + "." + fBase->fType.fields()[fFieldIndex].fName;
}
std::unique_ptr<Expression> fBase;
const int fFieldIndex;
const OwnerKind fOwnerKind;
typedef Expression INHERITED;
};
} // namespace
#endif
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