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| author | Volodymyr Sapsai <vsapsai@apple.com> | 2017-10-23 22:01:41 +0000 |
|---|---|---|
| committer | Volodymyr Sapsai <vsapsai@apple.com> | 2017-10-23 22:01:41 +0000 |
| commit | b1ead8ba0f35dc3bf852be933dc2fe123fefa2ea (patch) | |
| tree | b7ee36e0d649399cf9622766c3cb9d2f37e48c7c /include/clang/Basic/DiagnosticGroups.td | |
| parent | 96af6760cdf721570c13b4aff35b11dcef5f043c (diff) | |
[Sema] Add support for flexible array members in Obj-C.
Allow Obj-C ivars with incomplete array type but only as the last ivar.
Also add a requirement for ivars that contain a flexible array member to
be at the end of class too. It is possible to add in a subclass another
ivar at the end but we'll emit a warning in this case. Also we'll emit a
warning if a variable sized ivar is declared in class extension or in
implementation because subclasses won't know they should avoid adding
new ivars.
In ARC incomplete array objects are treated as __unsafe_unretained so
require them to be marked as such.
Prohibit synthesizing ivars with flexible array members because order of
synthesized ivars is not obvious and tricky to control. Spelling out
ivar explicitly gives control to developers and helps to avoid surprises
with unexpected ivar ordering.
For C and C++ changed diagnostic to tell explicitly a field is not the
last one and point to the next field. It is not as useful as in Obj-C
but it is an improvement and it is consistent with Obj-C. For C for
unions emit more specific err_flexible_array_union instead of generic
err_field_incomplete.
rdar://problem/21054495
Reviewers: rjmccall, theraven
Reviewed By: rjmccall
Subscribers: cfe-commits
Differential Revision: https://reviews.llvm.org/D38773
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@316381 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'include/clang/Basic/DiagnosticGroups.td')
| -rw-r--r-- | include/clang/Basic/DiagnosticGroups.td | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/clang/Basic/DiagnosticGroups.td b/include/clang/Basic/DiagnosticGroups.td index 1896280761..4cceaf6ccc 100644 --- a/include/clang/Basic/DiagnosticGroups.td +++ b/include/clang/Basic/DiagnosticGroups.td @@ -374,6 +374,7 @@ def ObjCRootClass : DiagGroup<"objc-root-class">; def ObjCPointerIntrospectPerformSelector : DiagGroup<"deprecated-objc-pointer-introspection-performSelector">; def ObjCPointerIntrospect : DiagGroup<"deprecated-objc-pointer-introspection", [ObjCPointerIntrospectPerformSelector]>; def ObjCMultipleMethodNames : DiagGroup<"objc-multiple-method-names">; +def ObjCFlexibleArray : DiagGroup<"objc-flexible-array">; def OpenCLUnsupportedRGBA: DiagGroup<"opencl-unsupported-rgba">; def DeprecatedObjCIsaUsage : DiagGroup<"deprecated-objc-isa-usage">; def ExplicitInitializeCall : DiagGroup<"explicit-initialize-call">; @@ -750,6 +751,7 @@ def Most : DiagGroup<"most", [ VolatileRegisterVar, ObjCMissingSuperCalls, ObjCDesignatedInit, + ObjCFlexibleArray, OverloadedVirtual, PrivateExtern, SelTypeCast, |