LLDB  mainline
ClangUtil.cpp
Go to the documentation of this file.
1 //===-- ClangUtil.cpp -----------------------------------------------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 // A collection of helper methods and data structures for manipulating clang
8 // types and decls.
9 //===----------------------------------------------------------------------===//
10 
13 
14 using namespace clang;
15 using namespace lldb_private;
16 
17 bool ClangUtil::IsClangType(const CompilerType &ct) {
18  // Invalid types are never Clang types.
19  if (!ct)
20  return false;
21 
22  if (llvm::dyn_cast_or_null<TypeSystemClang>(ct.GetTypeSystem()) == nullptr)
23  return false;
24 
25  if (!ct.GetOpaqueQualType())
26  return false;
27 
28  return true;
29 }
30 
31 clang::Decl *ClangUtil::GetDecl(const CompilerDecl &decl) {
32  assert(llvm::isa<TypeSystemClang>(decl.GetTypeSystem()));
33  return static_cast<clang::Decl *>(decl.GetOpaqueDecl());
34 }
35 
36 QualType ClangUtil::GetQualType(const CompilerType &ct) {
37  // Make sure we have a clang type before making a clang::QualType
38  if (!IsClangType(ct))
39  return QualType();
40 
41  return QualType::getFromOpaquePtr(ct.GetOpaqueQualType());
42 }
43 
44 QualType ClangUtil::GetCanonicalQualType(const CompilerType &ct) {
45  if (!IsClangType(ct))
46  return QualType();
47 
48  return GetQualType(ct).getCanonicalType();
49 }
50 
51 CompilerType ClangUtil::RemoveFastQualifiers(const CompilerType &ct) {
52  if (!IsClangType(ct))
53  return ct;
54 
55  QualType qual_type(GetQualType(ct));
56  qual_type.removeLocalFastQualifiers();
57  return CompilerType(ct.GetTypeSystem(), qual_type.getAsOpaquePtr());
58 }
59 
60 clang::TagDecl *ClangUtil::GetAsTagDecl(const CompilerType &type) {
61  clang::QualType qual_type = ClangUtil::GetCanonicalQualType(type);
62  if (qual_type.isNull())
63  return nullptr;
64 
65  return qual_type->getAsTagDecl();
66 }
67 
68 std::string ClangUtil::DumpDecl(const clang::Decl *d) {
69  if (!d)
70  return "nullptr";
71 
72  std::string result;
73  llvm::raw_string_ostream stream(result);
74  bool deserialize = false;
75  d->dump(stream, deserialize);
76 
77  stream.flush();
78  return result;
79 }
80 
81 std::string ClangUtil::ToString(const clang::Type *t) {
82  return clang::QualType(t, 0).getAsString();
83 }
84 
85 std::string ClangUtil::ToString(const CompilerType &c) {
86  return ClangUtil::GetQualType(c).getAsString();
87 }
A class that represents a running process on the host machine.
lldb::opaque_compiler_type_t GetOpaqueQualType() const
Definition: CompilerType.h:168
TypeSystem * GetTypeSystem() const
Accessors.
Definition: CompilerType.h:157
TypeSystem * GetTypeSystem() const
Definition: CompilerDecl.h:56
Represents a generic type in a programming language.
Definition: CompilerType.h:33
void * GetOpaqueDecl() const
Definition: CompilerDecl.h:58
Represents a generic declaration such as a function declaration.
Definition: CompilerDecl.h:28