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_PREFIXEXPRESSION
9 #define SKSL_PREFIXEXPRESSION
10 
11 #include "SkSLExpression.h"
12 #include "SkSLToken.h"
13 
14 namespace SkSL {
15 
16 /**
17  * An expression modified by a unary operator appearing before it, such as '!flag'.
18  */
19 struct PrefixExpression : public Expression {
PrefixExpressionPrefixExpression20     PrefixExpression(Token::Kind op, std::unique_ptr<Expression> operand)
21     : INHERITED(operand->fPosition, kPrefix_Kind, operand->fType)
22     , fOperand(std::move(operand))
23     , fOperator(op) {}
24 
descriptionPrefixExpression25     virtual SkString description() const override {
26         return Token::OperatorName(fOperator) + fOperand->description();
27     }
28 
29     std::unique_ptr<Expression> fOperand;
30     const Token::Kind fOperator;
31 
32     typedef Expression INHERITED;
33 };
34 
35 } // namespace
36 
37 #endif
38