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_ASTVARDECLARATIONS 9 #define SKSL_ASTVARDECLARATIONS 10 11 #include "SkSLASTDeclaration.h" 12 #include "SkSLASTStatement.h" 13 #include "SkSLASTType.h" 14 #include "../SkSLUtil.h" 15 #include "../ir/SkSLModifiers.h" 16 17 namespace SkSL { 18 19 /** 20 * A single variable declaration within a var declaration statement. For instance, the statement 21 * 'int x = 2, y[3];' is an ASTVarDeclarations statement containing two individual ASTVarDeclaration 22 * instances. 23 */ 24 struct ASTVarDeclaration { ASTVarDeclarationASTVarDeclaration25 ASTVarDeclaration(const String name, 26 std::vector<std::unique_ptr<ASTExpression>> sizes, 27 std::unique_ptr<ASTExpression> value) 28 : fName(name) 29 , fSizes(std::move(sizes)) 30 , fValue(std::move(value)) {} 31 descriptionASTVarDeclaration32 String description() const { 33 String result = fName; 34 for (const auto& size : fSizes) { 35 if (size) { 36 result += "[" + size->description() + "]"; 37 } else { 38 result += "[]"; 39 } 40 } 41 if (fValue) { 42 result += " = " + fValue->description(); 43 } 44 return result; 45 } 46 47 String fName; 48 49 // array sizes, if any. e.g. 'foo[3][]' has sizes [3, null] 50 std::vector<std::unique_ptr<ASTExpression>> fSizes; 51 52 // initial value, may be null 53 std::unique_ptr<ASTExpression> fValue; 54 }; 55 56 /** 57 * A variable declaration statement, which may consist of one or more individual variables. 58 */ 59 struct ASTVarDeclarations : public ASTDeclaration { ASTVarDeclarationsASTVarDeclarations60 ASTVarDeclarations(Modifiers modifiers, 61 std::unique_ptr<ASTType> type, 62 std::vector<ASTVarDeclaration> vars) 63 : INHERITED(type->fPosition, kVar_Kind) 64 , fModifiers(modifiers) 65 , fType(std::move(type)) 66 , fVars(std::move(vars)) {} 67 descriptionASTVarDeclarations68 String description() const override { 69 String result = fModifiers.description() + fType->description() + " "; 70 String separator; 71 for (const auto& var : fVars) { 72 result += separator; 73 separator = ", "; 74 result += var.description(); 75 } 76 return result; 77 } 78 79 const Modifiers fModifiers; 80 const std::unique_ptr<ASTType> fType; 81 const std::vector<ASTVarDeclaration> fVars; 82 83 typedef ASTDeclaration INHERITED; 84 }; 85 86 } // namespace 87 88 #endif 89