Moving the documentation for the objc_method_family attribute into AttrDocs.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@201686 91177308-0d34-0410-b5e6-96231b3b80d8

docs/LanguageExtensions.rst

@@ -1241,31 +1241,6 @@ implementation of an override in a subclass does not call super.  For example:
    - (void) AnnotMeth{};
                       ^
 
-Objective-C Method Families
----------------------------
-
-Many methods in Objective-C have conventional meanings determined by their
-selectors. It is sometimes useful to be able to mark a method as having a
-particular conventional meaning despite not having the right selector, or as
-not having the conventional meaning that its selector would suggest. For these
-use cases, we provide an attribute to specifically describe the "method family"
-that a method belongs to.
-
-**Usage**: ``__attribute__((objc_method_family(X)))``, where ``X`` is one of
-``none``, ``alloc``, ``copy``, ``init``, ``mutableCopy``, or ``new``.  This
-attribute can only be placed at the end of a method declaration:
-
-.. code-block:: objc
-
-  - (NSString *)initMyStringValue __attribute__((objc_method_family(none)));
-
-Users who do not wish to change the conventional meaning of a method, and who
-merely want to document its non-standard retain and release semantics, should
-use the :ref:`retaining behavior attributes <langext-objc-retain-release>`
-described below.
-
-Query for this feature with ``__has_attribute(objc_method_family)``.
-
 .. _langext-objc-retain-release:
 
 Objective-C retaining behavior attributes

include/clang/Basic/Attr.td

@@ -920,7 +920,7 @@ def ObjCMethodFamily : InheritableAttr {
                ["none", "alloc", "copy", "init", "mutableCopy", "new"],
                ["OMF_None", "OMF_alloc", "OMF_copy", "OMF_init",
                 "OMF_mutableCopy", "OMF_new"]>];
-  let Documentation = [Undocumented];
+  let Documentation = [ObjCMethodFamilyDocs];
 }
 
 def ObjCNSObject : InheritableAttr {

include/clang/Basic/AttrDocs.td

@@ -239,4 +239,31 @@ caveats to this use of name mangling:
 
 Query for this feature with ``__has_extension(attribute_overloadable)``.
   }];
+}
+
+def ObjCMethodFamilyDocs : Documentation {
+  let Category = DocCatFunction;
+  let Content = [{
+Many methods in Objective-C have conventional meanings determined by their
+selectors. It is sometimes useful to be able to mark a method as having a
+particular conventional meaning despite not having the right selector, or as
+not having the conventional meaning that its selector would suggest. For these
+use cases, we provide an attribute to specifically describe the "method family"
+that a method belongs to.
+
+**Usage**: ``__attribute__((objc_method_family(X)))``, where ``X`` is one of
+``none``, ``alloc``, ``copy``, ``init``, ``mutableCopy``, or ``new``.  This
+attribute can only be placed at the end of a method declaration:
+
+.. code-block:: objc
+
+  - (NSString *)initMyStringValue __attribute__((objc_method_family(none)));
+
+Users who do not wish to change the conventional meaning of a method, and who
+merely want to document its non-standard retain and release semantics, should
+use the retaining behavior attributes (``ns_returns_retained``,
+``ns_returns_not_retained``, etc).
+
+Query for this feature with ``__has_attribute(objc_method_family)``.
+  }];
 }
\ No newline at end of file