1 /* 2 * Copyright 2011, The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #ifndef _FRAMEWORKS_COMPILE_SLANG_SLANG_RS_AST_REPLACE_H_ // NOLINT 18 #define _FRAMEWORKS_COMPILE_SLANG_SLANG_RS_AST_REPLACE_H_ 19 20 #include "clang/AST/StmtVisitor.h" 21 22 #include "slang_assert.h" 23 #include "clang/AST/ASTContext.h" 24 25 namespace clang { 26 class Diagnostic; 27 class Expr; 28 class Stmt; 29 } 30 31 namespace slang { 32 33 class RSASTReplace : public clang::StmtVisitor<RSASTReplace> { 34 private: 35 const clang::ASTContext &C; 36 clang::Stmt *mOuterStmt; 37 clang::Stmt *mOldStmt; 38 clang::Stmt *mNewStmt; 39 clang::Expr *mOldExpr; 40 clang::Expr *mNewExpr; 41 matchesExpr(const clang::Expr * E)42 inline bool matchesExpr(const clang::Expr *E) const { 43 bool retVal = mOldExpr && (mOldExpr == E); 44 if (retVal) { 45 slangAssert(mNewExpr && 46 "Cannot replace an expression if we don't have a new expression"); 47 } 48 return retVal; 49 } 50 matchesStmt(const clang::Stmt * S)51 inline bool matchesStmt(const clang::Stmt *S) const { 52 slangAssert(mOldStmt); 53 return mOldStmt == S; 54 } 55 56 void ReplaceInCompoundStmt(clang::CompoundStmt *CS); 57 58 public: RSASTReplace(const clang::ASTContext & Con)59 explicit RSASTReplace(const clang::ASTContext &Con) 60 : C(Con), 61 mOuterStmt(nullptr), 62 mOldStmt(nullptr), 63 mNewStmt(nullptr), 64 mOldExpr(nullptr), 65 mNewExpr(nullptr) { 66 } 67 68 void VisitStmt(clang::Stmt *S); 69 void VisitCompoundStmt(clang::CompoundStmt *CS); 70 void VisitCaseStmt(clang::CaseStmt *CS); 71 void VisitDeclStmt(clang::DeclStmt* DS); 72 void VisitDefaultStmt(clang::DefaultStmt *DS); 73 void VisitDoStmt(clang::DoStmt *DS); 74 void VisitForStmt(clang::ForStmt *FS); 75 void VisitIfStmt(clang::IfStmt *IS); 76 void VisitSwitchCase(clang::SwitchCase *SC); 77 void VisitSwitchStmt(clang::SwitchStmt *SS); 78 void VisitWhileStmt(clang::WhileStmt *WS); 79 80 // Replace all instances of OldStmt in OuterStmt with NewStmt. 81 void ReplaceStmt( 82 clang::Stmt *OuterStmt, 83 clang::Stmt *OldStmt, 84 clang::Stmt *NewStmt); 85 }; 86 87 } // namespace slang 88 89 #endif // _FRAMEWORKS_COMPILE_SLANG_SLANG_RS_AST_REPLACE_H_ NOLINT 90