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
25namespace clang {
26  class Diagnostic;
27  class Expr;
28  class Stmt;
29}
30
31namespace slang {
32
33class RSASTReplace : public clang::StmtVisitor<RSASTReplace> {
34 private:
35  clang::ASTContext &C;
36  clang::Stmt *mOuterStmt;
37  clang::Stmt *mOldStmt;
38  clang::Stmt *mNewStmt;
39  clang::Expr *mOldExpr;
40  clang::Expr *mNewExpr;
41
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
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:
59  explicit RSASTReplace(clang::ASTContext &Con)
60      : C(Con),
61        mOuterStmt(NULL),
62        mOldStmt(NULL),
63        mNewStmt(NULL),
64        mOldExpr(NULL),
65        mNewExpr(NULL) {
66    return;
67  }
68
69  void VisitStmt(clang::Stmt *S);
70  void VisitCompoundStmt(clang::CompoundStmt *CS);
71  void VisitCaseStmt(clang::CaseStmt *CS);
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