SkSLIfStatement.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_IFSTATEMENT
#define SKSL_IFSTATEMENT
 
#include "src/sksl/SkSLPosition.h"
#include "src/sksl/ir/SkSLExpression.h"
#include "src/sksl/ir/SkSLIRNode.h"
#include "src/sksl/ir/SkSLStatement.h"
 
#include <memory>
#include <string>
#include <utility>
 
namespace SkSL {
 
class Context;
 
/**
 * An 'if' statement.
 */
class IfStatement final : public Statement {
public:
    inline static constexpr Kind kIRNodeKind = Kind::kIf;
 
    IfStatement(Position pos, std::unique_ptr<Expression> test,
                std::unique_ptr<Statement> ifTrue, std::unique_ptr<Statement> ifFalse)
        : INHERITED(pos, kIRNodeKind)
        , fTest(std::move(test))
        , fIfTrue(std::move(ifTrue))
        , fIfFalse(std::move(ifFalse)) {}
 
    // Creates a potentially-simplified form of the if-statement. Typechecks and coerces the test
    // expression; reports errors via ErrorReporter.
    static std::unique_ptr<Statement> Convert(const Context& context,
                                              Position pos,
                                              std::unique_ptr<Expression> test,
                                              std::unique_ptr<Statement> ifTrue,
                                              std::unique_ptr<Statement> ifFalse);
 
    // Creates a potentially-simplified form of the if-statement; reports errors via ASSERT.
    static std::unique_ptr<Statement> Make(const Context& context,
                                           Position pos,
                                           std::unique_ptr<Expression> test,
                                           std::unique_ptr<Statement> ifTrue,
                                           std::unique_ptr<Statement> ifFalse);
 
    std::unique_ptr<Expression>& test() {
        return fTest;
    }
 
    const std::unique_ptr<Expression>& test() const {
        return fTest;
    }
 
    std::unique_ptr<Statement>& ifTrue() {
        return fIfTrue;
    }
 
    const std::unique_ptr<Statement>& ifTrue() const {
        return fIfTrue;
    }
 
    std::unique_ptr<Statement>& ifFalse() {
        return fIfFalse;
    }
 
    const std::unique_ptr<Statement>& ifFalse() const {
        return fIfFalse;
    }
 
    std::string description() const override;
 
private:
    std::unique_ptr<Expression> fTest;
    std::unique_ptr<Statement> fIfTrue;
    std::unique_ptr<Statement> fIfFalse;
 
    using INHERITED = Statement;
};
 
}  // namespace SkSL
 
#endif