skia2/src/sksl/dsl/DSLExpression.h

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/*
* Copyright 2020 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_EXPRESSION
#define SKSL_DSL_EXPRESSION
#include "include/core/SkTypes.h"
#include "src/sksl/ir/SkSLIRNode.h"
#include <cstdint>
#include <memory>
namespace SkSL {
class Expression;
namespace dsl {
class DSLExpression;
class DSLVar;
/**
* Represents an expression such as 'cos(x)' or 'a + b'.
*/
class DSLExpression {
public:
DSLExpression(const DSLExpression&) = delete;
DSLExpression(DSLExpression&&) = default;
DSLExpression();
/**
* Creates an expression representing a literal float.
*/
DSLExpression(float value);
/**
* Creates an expression representing a literal float.
*/
DSLExpression(double value)
: DSLExpression((float) value) {}
/**
* Creates an expression representing a literal int.
*/
DSLExpression(int value);
/**
* Creates an expression representing a literal bool.
*/
DSLExpression(bool value);
/**
* Creates an expression representing a variable reference.
*/
DSLExpression(const DSLVar& var);
~DSLExpression();
/**
* Overloads the '=' operator to create an SkSL assignment statement.
*/
DSLExpression operator=(DSLExpression other);
/**
* Invalidates this object and returns the SkSL expression it represents.
*/
std::unique_ptr<SkSL::Expression> release();
private:
DSLExpression(std::unique_ptr<SkSL::Expression> expression);
/**
* Invalidates this object and returns the SkSL expression it represents coerced to the
* specified type. If the expression cannot be coerced, reports an error and returns null.
*/
std::unique_ptr<SkSL::Expression> coerceAndRelease(const SkSL::Type& type);
std::unique_ptr<SkSL::Expression> fExpression;
friend class DSLCore;
friend class DSLVar;
friend class DSLWriter;
};
DSLExpression operator+(DSLExpression left, DSLExpression right);
DSLExpression operator+=(DSLExpression left, DSLExpression right);
DSLExpression operator-(DSLExpression left, DSLExpression right);
DSLExpression operator-=(DSLExpression left, DSLExpression right);
DSLExpression operator*(DSLExpression left, DSLExpression right);
DSLExpression operator*=(DSLExpression left, DSLExpression right);
DSLExpression operator/(DSLExpression left, DSLExpression right);
DSLExpression operator/=(DSLExpression left, DSLExpression right);
DSLExpression operator%(DSLExpression left, DSLExpression right);
DSLExpression operator%=(DSLExpression left, DSLExpression right);
DSLExpression operator<<(DSLExpression left, DSLExpression right);
DSLExpression operator<<=(DSLExpression left, DSLExpression right);
DSLExpression operator>>(DSLExpression left, DSLExpression right);
DSLExpression operator>>=(DSLExpression left, DSLExpression right);
DSLExpression operator&&(DSLExpression left, DSLExpression right);
DSLExpression operator||(DSLExpression left, DSLExpression right);
DSLExpression operator&(DSLExpression left, DSLExpression right);
DSLExpression operator&=(DSLExpression left, DSLExpression right);
DSLExpression operator|(DSLExpression left, DSLExpression right);
DSLExpression operator|=(DSLExpression left, DSLExpression right);
DSLExpression operator^(DSLExpression left, DSLExpression right);
DSLExpression operator^=(DSLExpression left, DSLExpression right);
DSLExpression operator,(DSLExpression left, DSLExpression right);
DSLExpression operator==(DSLExpression left, DSLExpression right);
DSLExpression operator!=(DSLExpression left, DSLExpression right);
DSLExpression operator>(DSLExpression left, DSLExpression right);
DSLExpression operator<(DSLExpression left, DSLExpression right);
DSLExpression operator>=(DSLExpression left, DSLExpression right);
DSLExpression operator<=(DSLExpression left, DSLExpression right);
DSLExpression operator!(DSLExpression expr);
DSLExpression operator~(DSLExpression expr);
DSLExpression operator++(DSLExpression expr);
DSLExpression operator++(DSLExpression expr, int);
DSLExpression operator--(DSLExpression expr);
DSLExpression operator--(DSLExpression expr, int);
} // namespace dsl
} // namespace SkSL
#endif