r315103 - -Wdocumentation should allow '...' params in variadic function type aliases

[Alex Lorenz via cfe-commits]

Author: arphaman
Date: Fri Oct  6 13:51:04 2017
New Revision: 315103

URL: http://llvm.org/viewvc/llvm-project?rev=315103&view=rev
Log:
-Wdocumentation should allow '...' params in variadic function type aliases

rdar://34811344

Modified:
    cfe/trunk/lib/AST/CommentSema.cpp
    cfe/trunk/test/Sema/warn-documentation.cpp
    cfe/trunk/test/Sema/warn-documentation.m

Modified: cfe/trunk/lib/AST/CommentSema.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/AST/CommentSema.cpp?rev=315103&r1=315102&r2=315103&view=diff
==============================================================================
--- cfe/trunk/lib/AST/CommentSema.cpp (original)
+++ cfe/trunk/lib/AST/CommentSema.cpp Fri Oct  6 13:51:04 2017
@@ -813,7 +813,7 @@ bool Sema::isAnyFunctionDecl() {
 }
 
 bool Sema::isFunctionOrMethodVariadic() {
-  if (!isAnyFunctionDecl() && !isObjCMethodDecl() && !isFunctionTemplateDecl())
+  if (!isFunctionDecl() || !ThisDeclInfo->CurrentDecl)
     return false;
   if (const FunctionDecl *FD =
         dyn_cast<FunctionDecl>(ThisDeclInfo->CurrentDecl))
@@ -824,6 +824,14 @@ bool Sema::isFunctionOrMethodVariadic()
   if (const ObjCMethodDecl *MD =
         dyn_cast<ObjCMethodDecl>(ThisDeclInfo->CurrentDecl))
     return MD->isVariadic();
+  if (const TypedefNameDecl *TD =
+          dyn_cast<TypedefNameDecl>(ThisDeclInfo->CurrentDecl)) {
+    QualType Type = TD->getUnderlyingType();
+    if (Type->isFunctionPointerType() || Type->isBlockPointerType())
+      Type = Type->getPointeeType();
+    if (const auto *FT = Type->getAs<FunctionProtoType>())
+      return FT->isVariadic();
+  }
   return false;
 }
 

Modified: cfe/trunk/test/Sema/warn-documentation.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/test/Sema/warn-documentation.cpp?rev=315103&r1=315102&r2=315103&view=diff
==============================================================================
--- cfe/trunk/test/Sema/warn-documentation.cpp (original)
+++ cfe/trunk/test/Sema/warn-documentation.cpp Fri Oct  6 13:51:04 2017
@@ -1282,3 +1282,25 @@ struct HasMoreFields {
 };
 
 }
+
+/*!
+ * Function pointer typedef with variadic params.
+ *
+ * @param a
+ * works
+ *
+ * @param ...
+ * now should work too.
+ */
+typedef void (*VariadicFnType)(int a, ...);
+
+/*!
+ * Function pointer type alias with variadic params.
+ *
+ * @param a
+ * works
+ *
+ * @param ...
+ * now should work too.
+ */
+using VariadicFnType2 = void (*)(int a, ...);

Modified: cfe/trunk/test/Sema/warn-documentation.m
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/test/Sema/warn-documentation.m?rev=315103&r1=315102&r2=315103&view=diff
==============================================================================
--- cfe/trunk/test/Sema/warn-documentation.m (original)
+++ cfe/trunk/test/Sema/warn-documentation.m Fri Oct  6 13:51:04 2017
@@ -299,3 +299,14 @@ void (^_Nullable blockPointerVariableTha
 @property void (^blockReturnsNothing)();
 
 @end
+
+/*!
+ * Block typedef with variadic params.
+ *
+ * @param a
+ * works
+ *
+ * @param ...
+ * now should work too.
+ */
+typedef void (^VariadicBlockType)(int a, ...);