[lldb] Add templated CompilerType::GetTypeSystem (NFC) (#140424)

Add an overloaded `GetTypeSystem` to specify the expected type system subclass. Changes code from  `GetTypeSystem().dyn_cast_or_null<TypeSystemClang>()` to `GetTypeSystem<TypeSystemClang>()`.

1 files changed, 1 insertions, 2 deletions

diff --git a/lldb/source/Plugins/ExpressionParser/Clang/ClangASTSource.cpp b/lldb/source/Plugins/ExpressionParser/Clang/ClangASTSource.cpp
index 34129807277d..4b52f6aafcb7 100644
--- a/lldb/source/Plugins/ExpressionParser/Clang/ClangASTSource.cpp
+++ b/lldb/source/Plugins/ExpressionParser/Clang/ClangASTSource.cpp
@@ -1477,8 +1477,7 @@ ClangASTImporter::DeclOrigin ClangASTSource::GetDeclOrigin(const clang::Decl *de
 }
 
 CompilerType ClangASTSource::GuardedCopyType(const CompilerType &src_type) {
-  auto ts = src_type.GetTypeSystem();
-  auto src_ast = ts.dyn_cast_or_null<TypeSystemClang>();
+  auto src_ast = src_type.GetTypeSystem<TypeSystemClang>();
   if (!src_ast)
     return {};