[lldb][TypeSynthetic][NFC] Make SyntheticChildrenFrontend::Update() return an enum (#80167)

This patch changes the return value of
`SyntheticChildrenFrontend::Update` to a scoped enum that aims to
describe what the return value means.

1 files changed, 5 insertions, 4 deletions

diff --git a/lldb/source/Plugins/Language/CPlusPlus/LibCxxMap.cpp b/lldb/source/Plugins/Language/CPlusPlus/LibCxxMap.cpp
index d3ee63a..d208acf 100644
--- a/lldb/source/Plugins/Language/CPlusPlus/LibCxxMap.cpp
+++ b/lldb/source/Plugins/Language/CPlusPlus/LibCxxMap.cpp
@@ -181,7 +181,7 @@ public:
 
   lldb::ValueObjectSP GetChildAtIndex(size_t idx) override;
 
-  bool Update() override;
+  lldb::ChildCacheState Update() override;
 
   bool MightHaveChildren() override;
 
@@ -405,15 +405,16 @@ lldb_private::formatters::LibcxxStdMapSyntheticFrontEnd::GetChildAtIndex(
   return potential_child_sp;
 }
 
-bool lldb_private::formatters::LibcxxStdMapSyntheticFrontEnd::Update() {
+lldb::ChildCacheState
+lldb_private::formatters::LibcxxStdMapSyntheticFrontEnd::Update() {
   m_count = UINT32_MAX;
   m_tree = m_root_node = nullptr;
   m_iterators.clear();
   m_tree = m_backend.GetChildMemberWithName("__tree_").get();
   if (!m_tree)
-    return false;
+    return lldb::ChildCacheState::eRefetch;
   m_root_node = m_tree->GetChildMemberWithName("__begin_node_").get();
-  return false;
+  return lldb::ChildCacheState::eRefetch;
 }
 
 bool lldb_private::formatters::LibcxxStdMapSyntheticFrontEnd::