| /* |
| * 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_BINARYEXPRESSION |
| #define SKSL_BINARYEXPRESSION |
| |
| #include "src/sksl/SkSLCompiler.h" |
| #include "src/sksl/SkSLIRGenerator.h" |
| #include "src/sksl/SkSLLexer.h" |
| #include "src/sksl/ir/SkSLExpression.h" |
| #include "src/sksl/ir/SkSLExpression.h" |
| |
| namespace SkSL { |
| |
| /** |
| * A binary operation. |
| */ |
| struct BinaryExpression : public Expression { |
| BinaryExpression(int offset, std::unique_ptr<Expression> left, Token::Kind op, |
| std::unique_ptr<Expression> right, const Type& type) |
| : INHERITED(offset, kBinary_Kind, type) |
| , fLeft(std::move(left)) |
| , fOperator(op) |
| , fRight(std::move(right)) {} |
| |
| bool isConstantOrUniform() const override { |
| return fLeft->isConstantOrUniform() && fRight->isConstantOrUniform(); |
| } |
| |
| std::unique_ptr<Expression> constantPropagate(const IRGenerator& irGenerator, |
| const DefinitionMap& definitions) override { |
| return irGenerator.constantFold(*fLeft, |
| fOperator, |
| *fRight); |
| } |
| |
| bool hasProperty(Property property) const override { |
| if (property == Property::kSideEffects && Compiler::IsAssignment(fOperator)) { |
| return true; |
| } |
| return fLeft->hasProperty(property) || fRight->hasProperty(property); |
| } |
| |
| int nodeCount() const override { |
| return 1 + fLeft->nodeCount() + fRight->nodeCount(); |
| } |
| |
| std::unique_ptr<Expression> clone() const override { |
| return std::unique_ptr<Expression>(new BinaryExpression(fOffset, fLeft->clone(), fOperator, |
| fRight->clone(), fType)); |
| } |
| |
| String description() const override { |
| return "(" + fLeft->description() + " " + Compiler::OperatorName(fOperator) + " " + |
| fRight->description() + ")"; |
| } |
| |
| std::unique_ptr<Expression> fLeft; |
| const Token::Kind fOperator; |
| std::unique_ptr<Expression> fRight; |
| |
| typedef Expression INHERITED; |
| }; |
| |
| } // namespace |
| |
| #endif |