Add support for ObjC property name to be a single acronym.

Summary:
This change will support cases like:

```
@property(assign, nonatomic) int ID;
```

Reviewers: benhamilton, hokein

Reviewed By: benhamilton

Subscribers: klimek, cfe-commits

Tags: #clang-tools-extra

Differential Revision: https://reviews.llvm.org/D46374

llvm-svn: 331545

1 files changed, 6 insertions, 0 deletions

diff --git a/clang-tools-extra/clang-tidy/objc/PropertyDeclarationCheck.cpp b/clang-tools-extra/clang-tidy/objc/PropertyDeclarationCheck.cpp
index fd15df9dea1..cafeac42ba1 100644
--- a/clang-tools-extra/clang-tidy/objc/PropertyDeclarationCheck.cpp
+++ b/clang-tools-extra/clang-tidy/objc/PropertyDeclarationCheck.cpp
@@ -217,6 +217,12 @@ void PropertyDeclarationCheck::check(const MatchFinder::MatchResult &Result) {
   assert(MatchedDecl->getName().size() > 0);
   auto *DeclContext = MatchedDecl->getDeclContext();
   auto *CategoryDecl = llvm::dyn_cast<ObjCCategoryDecl>(DeclContext);
+
+  auto AcronymsRegex =
+      llvm::Regex("^" + AcronymsGroupRegex(EscapedAcronyms) + "$");
+  if (AcronymsRegex.match(MatchedDecl->getName())) {
+    return;
+  }
   if (CategoryDecl != nullptr &&
       hasCategoryPropertyPrefix(MatchedDecl->getName())) {
     if (!prefixedPropertyNameValid(MatchedDecl->getName(), EscapedAcronyms) ||