lldb/source/Plugins/ExpressionParser/Clang/ClangUtil.cpp

   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
  11 #include "Plugins/ExpressionParser/Clang/ClangUtil.h"
  12 #include "Plugins/TypeSystem/Clang/TypeSystemClang.h"
  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 (!ct.GetTypeSystem().dyn_cast_or_null<TypeSystemClang>())
  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 }