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_ASTINDEXSUFFIX 9 #define SKSL_ASTINDEXSUFFIX 10 11 #include "SkSLASTExpression.h" 12 #include "SkSLASTSuffix.h" 13 14 namespace SkSL { 15 16 /** 17 * A bracketed expression, as in '[0]', indicating an array access. Empty brackets (as occur in 18 * 'float[](5, 6)' are represented with a null fExpression. 19 */ 20 struct ASTIndexSuffix : public ASTSuffix { ASTIndexSuffixASTIndexSuffix21 ASTIndexSuffix(Position position) 22 : INHERITED(position, ASTSuffix::kIndex_Kind) 23 , fExpression(nullptr) {} 24 ASTIndexSuffixASTIndexSuffix25 ASTIndexSuffix(std::unique_ptr<ASTExpression> expression) 26 : INHERITED(expression ? expression->fPosition : Position(), ASTSuffix::kIndex_Kind) 27 , fExpression(std::move(expression)) {} 28 descriptionASTIndexSuffix29 String description() const override { 30 if (fExpression) { 31 return "[" + fExpression->description() + "]"; 32 } else { 33 return String("[]"); 34 } 35 } 36 37 // may be null 38 std::unique_ptr<ASTExpression> fExpression; 39 40 typedef ASTSuffix INHERITED; 41 }; 42 43 } // namespace 44 45 #endif 46