Richard Smith 5030928d60 [c++20] Implement semantic restrictions for C++20 designated ... initializers. This has some interesting interactions with our existing extensions to support C99 designated initializers as an extension in C++. Those are resolved as follows: * We continue to permit the full breadth of C99 designated initializers in C++, with the exception that we disallow a partial overwrite of an initializer with a non-trivially-destructible type. (Full overwrite is OK, because we won't run the first initializer at all.) * The C99 extensions are disallowed in SFINAE contexts and during overload resolution, where they could change the meaning of valid programs. * C++20 disallows reordering of initializers. We only check for that for the simple cases that the C++20 rules permit (designators of the form '.field_name =' and continue to allow reordering in other cases). It would be nice to improve this behavior in future. * All C99 designated initializer extensions produce a warning by default in C++20 mode. People are going to learn the C++ rules based on what Clang diagnoses, so it's important we diagnose these properly by default. * In C++ <= 17, we apply the C++20 rules rather than the C99 rules, and so still diagnose C99 extensions as described above. We continue to accept designated C++20-compatible initializers in C++ <= 17 silently by default (but naturally still reject under -pedantic-errors). This is not a complete implementation of P0329R4. In particular, that paper introduces new non-C99-compatible syntax { .field { init } }, and we do not support that yet. This is based on a previous patch by Don Hinton, though I've made substantial changes when addressing the above interactions. Differential Revision: https://reviews.llvm.org/D59754 llvm-svn: 370544		2019-08-30 22:52:55 +00:00
..
Inputs	…
2007-10-03-MetadataPointers.mm	…
2010-08-04-Template.mm	…
2010-08-06-X.Y-syntax.mm	…
address-safety-attr.mm	…
arc-attrs-abi.mm	…
arc-attrs.mm	Generate objc intrinsics instead of runtime calls as the ARC optimizer now works only on intrinsics	2018-12-18 20:33:00 +00:00
arc-blocks.mm	Avoid needlessly copying a block to the heap when a block literal	2019-02-27 18:17:16 +00:00
arc-constexpr.mm	Generate objc intrinsics instead of runtime calls as the ARC optimizer now works only on intrinsics	2018-12-18 20:33:00 +00:00
arc-cxx11-init-list.mm	Generate objc intrinsics instead of runtime calls as the ARC optimizer now works only on intrinsics	2018-12-18 20:33:00 +00:00
arc-cxx11-member-init.mm	…
arc-exceptions.mm	Generate objc intrinsics instead of runtime calls as the ARC optimizer now works only on intrinsics	2018-12-18 20:33:00 +00:00
arc-forwarded-lambda-call.mm	[CodeGen][ObjC] Annotate calls to objc_retainAutoreleasedReturnValue	2019-03-21 19:59:49 +00:00
arc-globals.mm	Generate objc intrinsics instead of runtime calls as the ARC optimizer now works only on intrinsics	2018-12-18 20:33:00 +00:00
arc-indirect.mm	IR: print value numbers for unnamed function arguments	2019-08-03 14:28:34 +00:00
arc-list-init-destruct.mm	[Sema] Check that the destructor for each element of class type is	2018-09-07 02:38:01 +00:00
arc-mangle.mm	IR: print value numbers for unnamed function arguments	2019-08-03 14:28:34 +00:00
arc-marker-funclet.mm	[AST] Revert mangling changes from r339428	2018-10-04 19:50:14 +00:00
arc-move.mm	Generate objc intrinsics instead of runtime calls as the ARC optimizer now works only on intrinsics	2018-12-18 20:33:00 +00:00
arc-new-delete.mm	Generate objc intrinsics instead of runtime calls as the ARC optimizer now works only on intrinsics	2018-12-18 20:33:00 +00:00
arc-pseudo-destructors.mm	Generate objc intrinsics instead of runtime calls as the ARC optimizer now works only on intrinsics	2018-12-18 20:33:00 +00:00
arc-references.mm	Generate objc intrinsics instead of runtime calls as the ARC optimizer now works only on intrinsics	2018-12-18 20:33:00 +00:00
arc-returns-inner-reference-ptr.mm	Generate objc intrinsics instead of runtime calls as the ARC optimizer now works only on intrinsics	2018-12-18 20:33:00 +00:00
arc-special-member-functions.mm	Generate objc intrinsics instead of runtime calls as the ARC optimizer now works only on intrinsics	2018-12-18 20:33:00 +00:00
arc-weak.mm	Generate objc intrinsics instead of runtime calls as the ARC optimizer now works only on intrinsics	2018-12-18 20:33:00 +00:00
arc.mm	[CodeGen][ObjC] Annotate calls to objc_retainAutoreleasedReturnValue	2019-03-21 19:59:49 +00:00
auto-release-result-assert.mm	…
block-default-arg.mm	…
block-id.mm	…
block-in-template-inst.mm	…
block-nested-in-lambda.mm	[CodeGen] Replace '@' characters in block descriptors' symbol names with	2018-12-29 17:28:30 +00:00
block-var-layout.mm	…
blocks.mm	…
boxing.mm	…
catch-id-type.mm	…
copy.mm	…
copyable-property-object.mm	…
crash-function-type.mm	Pass the function type instead of the return type to FunctionDecl::Create	2018-11-11 00:56:15 +00:00
debug-info-block-capture-this.mm	…
debug-info-cyclic.mm	…
debug-info-line.mm	[DEBUGINFO] Add support for emission of the debug directives only.	2018-08-31 13:56:14 +00:00
debug-info.mm	…
designated-initializers.mm	[c++20] Implement semantic restrictions for C++20 designated	2019-08-30 22:52:55 +00:00
destroy.mm	Generate objc intrinsics instead of runtime calls as the ARC optimizer now works only on intrinsics	2018-12-18 20:33:00 +00:00
encode.mm	[ObjC] Fix encoding of ObjC pointer types that are pointers to typedefs	2019-05-29 21:23:30 +00:00
exception-cxx.mm	…
exceptions-legacy.mm	…
exceptions.mm	…
externally-initialized-selectors.mm	Specify target triple to fix the tests I committed in r360359 that are	2019-05-09 18:32:16 +00:00
foreach-statement.mm	…
gc.mm	…
implementation-in-extern-c.mm	…
implicit-copy-assign-operator.mm	…
implicit-copy-constructor.mm	IR: print value numbers for unnamed function arguments	2019-08-03 14:28:34 +00:00
inheriting-constructor-cleanup.mm	[CodeGen][ObjC] Annotate calls to objc_retainAutoreleasedReturnValue	2019-03-21 19:59:49 +00:00
instantiate-return.mm	…
ivar-objects.mm	…
lambda-expressions.mm	Generate objc intrinsics instead of runtime calls as the ARC optimizer now works only on intrinsics	2018-12-18 20:33:00 +00:00
lambda-to-block.mm	[CodeGen] Use the mangle context owned by CodeGenModule to correctly	2018-10-20 05:45:01 +00:00
literals.mm	[CodeGen][ObjC] Annotate calls to objc_retainAutoreleasedReturnValue	2019-03-21 19:59:49 +00:00
lvalue-reference-getter.mm	…
mangle-blocks.mm	…
mangle.mm	…
message-reference.mm	…
message.mm	…
method-local-extern-mangle.mm	…
microsoft-abi-arc-param-order.mm	IR: print value numbers for unnamed function arguments	2019-08-03 14:28:34 +00:00
mrc-weak.mm	[CodeGen][ObjC] Remove the leading `l_` from ObjC symbols and make	2019-05-09 17:43:52 +00:00
msabi-objc-extensions.mm	[AST] Revert mangling changes from r339428	2018-10-04 19:50:14 +00:00
msabi-objc-types.mm	[AST] Revert mangling changes from r339428	2018-10-04 19:50:14 +00:00
msabi-stret.mm	[Clang] Replace cc1 options '-mdisable-fp-elim' and '-momit-leaf-frame-pointer'	2019-07-20 22:50:50 +00:00
nested-ehlocation.mm	…
nrvo.mm	[Clang] Disable new PM for tests that use optimization level -O1, -O2 and -O3	2019-06-05 03:17:11 +00:00
objc-container-subscripting-1.mm	…
objc-container-subscripting.mm	…
objc-struct-cxx-abi.mm	Revert "[CodeGenCXX] Treat 'this' as noalias in constructors"	2018-10-15 15:43:00 +00:00
objc-weak.mm	Generate objc intrinsics instead of runtime calls as the ARC optimizer now works only on intrinsics	2018-12-18 20:33:00 +00:00
objfw-exceptions.mm	…
os_log.mm	[clang][NewPM] Add -fno-experimental-new-pass-manager to tests	2019-06-21 16:03:06 +00:00
personality-abuse.mm	…
personality.mm	…
pr14474-gline-tables-only.mm	[DEBUGINFO] Add support for emission of the debug directives only.	2018-08-31 13:56:14 +00:00
property-derived-to-base-conv.mm	…
property-dot-copy-elision.mm	Revert "[CodeGenCXX] Treat 'this' as noalias in constructors"	2018-10-15 15:43:00 +00:00
property-dot-copy.mm	…
property-dot-reference.mm	…
property-lvalue-capture.mm	…
property-lvalue-lambda.mm	[CodeGen] Fix a regression by emitting lambda expressions in EmitLValue	2019-04-02 19:48:07 +00:00
property-object-conditional-exp.mm	…
property-object-reference-1.mm	…
property-object-reference-2.mm	IR: print value numbers for unnamed function arguments	2019-08-03 14:28:34 +00:00
property-object-reference.mm	…
property-objects.mm	Revert "[CodeGenCXX] Treat 'this' as noalias in constructors"	2018-10-15 15:43:00 +00:00
property-reference.mm	…
refence-assign-write-barrier.mm	…
references.mm	…
return.mm	…
rtti.mm	…
selector-expr-lvalue.mm	…
subst-sel.mm	…
unknown-anytype.mm	…
write-barrier-global-assign.mm	…