1 /* 2 * Copyright 2021 Google LLC 3 * 4 * Use of this source code is governed by a BSD-style license that can be 5 * found in the LICENSE file. 6 */ 7 8 #ifndef SKSL_CONSTRUCTOR_ARRAY_CAST 9 #define SKSL_CONSTRUCTOR_ARRAY_CAST 10 11 #include "src/sksl/SkSLPosition.h" 12 #include "src/sksl/ir/SkSLConstructor.h" 13 #include "src/sksl/ir/SkSLExpression.h" 14 #include "src/sksl/ir/SkSLIRNode.h" 15 16 #include <memory> 17 #include <utility> 18 19 namespace SkSL { 20 21 class Context; 22 class Type; 23 24 /** 25 * Represents the typecasting of an array. Arrays cannot be directly casted in SkSL (or GLSL), but 26 * type narrowing can cause an array to be implicitly casted. For instance, the expression 27 * `myHalf2Array == float[2](a, b)` should be allowed when narrowing conversions are enabled; this 28 * constructor allows the necessary array-type conversion to be represented in IR. 29 * 30 * These always contain exactly 1 array of matching size, and are never constant. 31 */ 32 class ConstructorArrayCast final : public SingleArgumentConstructor { 33 public: 34 inline static constexpr Kind kIRNodeKind = Kind::kConstructorArrayCast; 35 ConstructorArrayCast(Position pos,const Type & type,std::unique_ptr<Expression> arg)36 ConstructorArrayCast(Position pos, const Type& type, std::unique_ptr<Expression> arg) 37 : INHERITED(pos, kIRNodeKind, &type, std::move(arg)) {} 38 39 static std::unique_ptr<Expression> Make(const Context& context, 40 Position pos, 41 const Type& type, 42 std::unique_ptr<Expression> arg); 43 clone(Position pos)44 std::unique_ptr<Expression> clone(Position pos) const override { 45 return std::make_unique<ConstructorArrayCast>(pos, this->type(), argument()->clone()); 46 } 47 48 private: 49 using INHERITED = SingleArgumentConstructor; 50 }; 51 52 } // namespace SkSL 53 54 #endif 55