[PATCH] D91908: [clang-tidy] Use compiled regex for AllowedRegexp in macro usage check

[Shane via Phabricator via cfe-commits]

smhc updated this revision to Diff 306870.
smhc added a comment.

Thanks - I had it like that originally but was not sure how often MacroUsageCallbacks would be instantiated or whether there was a many-to-one relationship. I've now modified it to create and maintain the regex object as a member of MacroUsageCallbacks.


CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D91908/new/

https://reviews.llvm.org/D91908

Files:
  clang-tools-extra/clang-tidy/cppcoreguidelines/MacroUsageCheck.cpp


Index: clang-tools-extra/clang-tidy/cppcoreguidelines/MacroUsageCheck.cpp
===================================================================
--- clang-tools-extra/clang-tidy/cppcoreguidelines/MacroUsageCheck.cpp
+++ clang-tools-extra/clang-tidy/cppcoreguidelines/MacroUsageCheck.cpp
@@ -32,8 +32,8 @@
 class MacroUsageCallbacks : public PPCallbacks {
 public:
   MacroUsageCallbacks(MacroUsageCheck *Check, const SourceManager &SM,
-                      StringRef RegExp, bool CapsOnly, bool IgnoreCommandLine)
-      : Check(Check), SM(SM), RegExp(RegExp), CheckCapsOnly(CapsOnly),
+                      StringRef RegExpStr, bool CapsOnly, bool IgnoreCommandLine)
+      : Check(Check), SM(SM), RegExp(RegExpStr), CheckCapsOnly(CapsOnly),
         IgnoreCommandLineMacros(IgnoreCommandLine) {}
   void MacroDefined(const Token &MacroNameTok,
                     const MacroDirective *MD) override {
@@ -47,7 +47,7 @@
       return;
 
     StringRef MacroName = MacroNameTok.getIdentifierInfo()->getName();
-    if (!CheckCapsOnly && !llvm::Regex(RegExp).match(MacroName))
+    if (!CheckCapsOnly && !RegExp.match(MacroName))
       Check->warnMacro(MD, MacroName);
 
     if (CheckCapsOnly && !isCapsOnly(MacroName))
@@ -57,7 +57,7 @@
 private:
   MacroUsageCheck *Check;
   const SourceManager &SM;
-  StringRef RegExp;
+  const llvm::Regex RegExp;
   bool CheckCapsOnly;
   bool IgnoreCommandLineMacros;
 };


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