[clang] [analyzer][NFC] Introduce framework for checker families (PR #139256)

[Donát Nagy via cfe-commits]

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@@ -581,6 +585,20 @@ class EventDispatcher {
   }
 };
 
+/// Tag that can use a checker name as a message provider
+/// (see SimpleProgramPointTag).
+/// FIXME: This is a cargo cult class which is copied into several checkers but
+/// does not provide anything useful.
+/// The only added functionality provided by this class (compared to
+/// SimpleProgramPointTag) is that it composes the tag description string from
+/// two arguments -- but tag descriptions only appear in debug output so there
+/// is no reason to bother with this.
+class CheckerProgramPointTag : public SimpleProgramPointTag {
+public:
+  CheckerProgramPointTag(StringRef CheckerName, StringRef Msg);
+  CheckerProgramPointTag(const CheckerBase *Checker, StringRef Msg);
+};
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NagyDonat wrote:

I just moved this code which was previously placed between `CheckerBase` and `Checker`, but I would like to clean it up in follow-up commits if I have time.

https://github.com/llvm/llvm-project/pull/139256