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/*
* Copyright 2021 Google LLC.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef SKSL_DSL_STATEMENT
#define SKSL_DSL_STATEMENT
#include "include/core/SkString.h"
#include "include/core/SkTypes.h"
#include "include/private/SkSLStatement.h"
#include "include/sksl/SkSLErrorReporter.h"
#include <memory>
class GrGLSLShaderBuilder;
namespace SkSL {
class Expression;
class Statement;
namespace dsl {
class DSLBlock;
class DSLExpression;
class DSLPossibleExpression;
class DSLPossibleStatement;
class DSLVar;
class DSLStatement {
public:
DSLStatement();
DSLStatement(DSLExpression expr);
DSLStatement(DSLPossibleExpression expr, PositionInfo pos = PositionInfo::Capture());
DSLStatement(DSLPossibleStatement stmt, PositionInfo pos = PositionInfo::Capture());
DSLStatement(DSLBlock block);
DSLStatement(DSLStatement&&) = default;
DSLStatement(std::unique_ptr<SkSL::Statement> stmt);
DSLStatement(std::unique_ptr<SkSL::Expression> expr);
~DSLStatement();
DSLStatement& operator=(DSLStatement&& other) = default;
bool hasValue() { return fStatement != nullptr; }
std::unique_ptr<SkSL::Statement> release() {
SkASSERT(this->hasValue());
return std::move(fStatement);
}
private:
std::unique_ptr<SkSL::Statement> releaseIfPossible() {
return std::move(fStatement);
}
std::unique_ptr<SkSL::Statement> fStatement;
friend class DSLBlock;
friend class DSLCore;
friend class DSLExpression;
friend class DSLPossibleStatement;
friend class DSLWriter;
friend DSLStatement operator,(DSLStatement left, DSLStatement right);
};
/**
* Represents a Statement which may have failed and/or have pending errors to report. Converting a
* PossibleStatement into a Statement requires PositionInfo so that any pending errors can be
* reported at the correct position.
*
* PossibleStatement is used instead of Statement in situations where it is not possible to capture
* the PositionInfo at the time of Statement construction.
*/
class DSLPossibleStatement {
public:
DSLPossibleStatement(std::unique_ptr<SkSL::Statement> stmt);
DSLPossibleStatement(DSLPossibleStatement&& other) = default;
~DSLPossibleStatement();
bool hasValue() { return fStatement != nullptr; }
std::unique_ptr<SkSL::Statement> release() {
return DSLStatement(std::move(*this)).release();
}
private:
std::unique_ptr<SkSL::Statement> fStatement;
friend class DSLStatement;
};
DSLStatement operator,(DSLStatement left, DSLStatement right);
} // namespace dsl
} // namespace SkSL
#endif
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