vendor/llvm-project/llvmorg-11-init-20887-g2e10b7a39b9vendor/llvm-project/master

1 files changed, 87 insertions, 0 deletions

diff --git a/lldb/source/Plugins/ExpressionParser/Clang/ClangUtil.cpp b/lldb/source/Plugins/ExpressionParser/Clang/ClangUtil.cpp
new file mode 100644
index 000000000000..a7f5dce8558f
--- /dev/null
+++ b/lldb/source/Plugins/ExpressionParser/Clang/ClangUtil.cpp
@@ -0,0 +1,87 @@
+//===-- ClangUtil.cpp -----------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+// A collection of helper methods and data structures for manipulating clang
+// types and decls.
+//===----------------------------------------------------------------------===//
+
+#include "Plugins/ExpressionParser/Clang/ClangUtil.h"
+#include "Plugins/TypeSystem/Clang/TypeSystemClang.h"
+
+using namespace clang;
+using namespace lldb_private;
+
+bool ClangUtil::IsClangType(const CompilerType &ct) {
+  // Invalid types are never Clang types.
+  if (!ct)
+    return false;
+
+  if (llvm::dyn_cast_or_null<TypeSystemClang>(ct.GetTypeSystem()) == nullptr)
+    return false;
+
+  if (!ct.GetOpaqueQualType())
+    return false;
+
+  return true;
+}
+
+clang::Decl *ClangUtil::GetDecl(const CompilerDecl &decl) {
+  assert(llvm::isa<TypeSystemClang>(decl.GetTypeSystem()));
+  return static_cast<clang::Decl *>(decl.GetOpaqueDecl());
+}
+
+QualType ClangUtil::GetQualType(const CompilerType &ct) {
+  // Make sure we have a clang type before making a clang::QualType
+  if (!IsClangType(ct))
+    return QualType();
+
+  return QualType::getFromOpaquePtr(ct.GetOpaqueQualType());
+}
+
+QualType ClangUtil::GetCanonicalQualType(const CompilerType &ct) {
+  if (!IsClangType(ct))
+    return QualType();
+
+  return GetQualType(ct).getCanonicalType();
+}
+
+CompilerType ClangUtil::RemoveFastQualifiers(const CompilerType &ct) {
+  if (!IsClangType(ct))
+    return ct;
+
+  QualType qual_type(GetQualType(ct));
+  qual_type.removeLocalFastQualifiers();
+  return CompilerType(ct.GetTypeSystem(), qual_type.getAsOpaquePtr());
+}
+
+clang::TagDecl *ClangUtil::GetAsTagDecl(const CompilerType &type) {
+  clang::QualType qual_type = ClangUtil::GetCanonicalQualType(type);
+  if (qual_type.isNull())
+    return nullptr;
+
+  return qual_type->getAsTagDecl();
+}
+
+std::string ClangUtil::DumpDecl(const clang::Decl *d) {
+  if (!d)
+    return "nullptr";
+
+  std::string result;
+  llvm::raw_string_ostream stream(result);
+  bool deserialize = false;
+  d->dump(stream, deserialize);
+
+  stream.flush();
+  return result;
+}
+
+std::string ClangUtil::ToString(const clang::Type *t) {
+  return clang::QualType(t, 0).getAsString();
+}
+
+std::string ClangUtil::ToString(const CompilerType &c) {
+  return ClangUtil::GetQualType(c).getAsString();
+}