Add some comments.

Created using spr 1.3.6

Author: qinkunbao

llvm/include/llvm/Support/SpecialCaseList.h

@@ -129,6 +129,9 @@ class SpecialCaseList {
       std::string Name;
       unsigned LineNo;
       GlobPattern Pattern;
+      // neither copyable nor movable because GlobPattern contains StringRef.
+      Glob(Glob &&) = delete;
+      Glob() = default;
     };
 
     std::vector<std::unique_ptr<Matcher::Glob>> Globs;

llvm/lib/Support/SpecialCaseList.cpp

@@ -56,7 +56,7 @@ Error SpecialCaseList::Matcher::insert(StringRef Pattern, unsigned LineNumber,
   auto Glob = std::make_unique<Matcher::Glob>();
   Glob->Name = Pattern.str();
   Glob->LineNo = LineNumber;
-  // We must be sure to use the string in the map rather than the provided
+  // We must be sure to use the string in `Glob` rather than the provided
   // reference which could be destroyed before match() is called
   if (auto Err = GlobPattern::create(Glob->Name, /*MaxSubPatterns=*/1024)
                      .moveInto(Glob->Pattern))