1 /*
2  * Copyright 2016 Google Inc.
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_BINARYEXPRESSION
9 #define SKSL_BINARYEXPRESSION
10 
11 #include "SkSLExpression.h"
12 #include "SkSLExpression.h"
13 #include "../SkSLIRGenerator.h"
14 #include "../SkSLToken.h"
15 
16 namespace SkSL {
17 
18 /**
19  * A binary operation.
20  */
21 struct BinaryExpression : public Expression {
BinaryExpressionBinaryExpression22     BinaryExpression(Position position, std::unique_ptr<Expression> left, Token::Kind op,
23                      std::unique_ptr<Expression> right, const Type& type)
24     : INHERITED(position, kBinary_Kind, type)
25     , fLeft(std::move(left))
26     , fOperator(op)
27     , fRight(std::move(right)) {}
28 
constantPropagateBinaryExpression29     virtual std::unique_ptr<Expression> constantPropagate(
30                                                         const IRGenerator& irGenerator,
31                                                         const DefinitionMap& definitions) override {
32         return irGenerator.constantFold(*fLeft,
33                                         fOperator,
34                                         *fRight);
35     }
36 
descriptionBinaryExpression37     virtual SkString description() const override {
38         return "(" + fLeft->description() + " " + Token::OperatorName(fOperator) + " " +
39                fRight->description() + ")";
40     }
41 
42     std::unique_ptr<Expression> fLeft;
43     const Token::Kind fOperator;
44     std::unique_ptr<Expression> fRight;
45 
46     typedef Expression INHERITED;
47 };
48 
49 } // namespace
50 
51 #endif
52