Revert "Recommit [DataFormatters] Add formatter for C++17 std::optional."

This broke a linux bot which doesn't support -std=c++17. The solution
is to add a decorator to skip these tests on machines with older compilers.

llvm-svn: 338162

1 files changed, 0 insertions, 22 deletions

diff --git a/lldb/source/Plugins/Language/CPlusPlus/LibCxx.cpp b/lldb/source/Plugins/Language/CPlusPlus/LibCxx.cpp
index 6c5a4f6095c..95e02a473cd 100644
--- a/lldb/source/Plugins/Language/CPlusPlus/LibCxx.cpp
+++ b/lldb/source/Plugins/Language/CPlusPlus/LibCxx.cpp
@@ -33,28 +33,6 @@ using namespace lldb;
 using namespace lldb_private;
 using namespace lldb_private::formatters;
 
-bool lldb_private::formatters::LibcxxOptionalSummaryProvider(
-    ValueObject &valobj, Stream &stream, const TypeSummaryOptions &options) {
-  ValueObjectSP valobj_sp(valobj.GetNonSyntheticValue());
-  if (!valobj_sp)
-    return false;
-
-  // An optional either contains a value or not, the member __engaged_ is
-  // a bool flag, it is true if the optional has a value and false otherwise.
-  ValueObjectSP engaged_sp(
-      valobj_sp->GetChildMemberWithName(ConstString("__engaged_"), true));
-
-  if (!engaged_sp)
-    return false;
-
-  llvm::StringRef engaged_as_cstring(
-      engaged_sp->GetValueAsUnsigned(0) == 1 ? "true" : "false");
-
-  stream.Printf(" Has Value=%s ", engaged_as_cstring.data());
-
-  return true;
-}
-
 bool lldb_private::formatters::LibcxxSmartPointerSummaryProvider(
     ValueObject &valobj, Stream &stream, const TypeSummaryOptions &options) {
   ValueObjectSP valobj_sp(valobj.GetNonSyntheticValue());