llvm-project/clang
Alex Lorenz 50be48b0f3 [clang][ObjC] Allow different availability annotation on a method
when implementing an optional protocol requirement

When an Objective-C method implements an optional protocol requirement,
allow the method to use a newer introduced or older obsoleted
availability version than what's specified on the method in the protocol
itself. This allows SDK adopters to adopt an optional method from a
protocol later than when the method is introduced in the protocol. The users
that call an optional method on an object that conforms to this protocol
are supposed to check whether the object implements the method or not,
so a lack of appropriate `if (@available)` check for a new OS version
is not a cause of concern as there's already another runtime check that's required.

Differential Revision: https://reviews.llvm.org/D102459
2021-05-19 12:13:57 -07:00
..
bindings
cmake [CMake] Update Cmake cache file for Win to ARM Linux cross builds. NFC 2021-05-18 20:29:16 -07:00
docs [SYCL] Enable opencl_global_[host,device] attributes for SYCL 2021-05-18 10:27:35 +03:00
examples
include [clang][ObjC] Allow different availability annotation on a method 2021-05-19 12:13:57 -07:00
INPUTS
lib [clang][ObjC] Allow different availability annotation on a method 2021-05-19 12:13:57 -07:00
runtime
test [clang][ObjC] Allow different availability annotation on a method 2021-05-19 12:13:57 -07:00
tools [clang-offload-bundler] Add sections and set section flags using one llvm-objcopy invocation 2021-05-18 08:44:41 -07:00
unittests Introduce SYCL 2020 mode 2021-05-18 10:34:14 -04:00
utils Revert "Reapply "[clang][deps] Support inferred modules"" 2021-05-19 19:19:37 +02:00
www Added a faster method to clone llvm project [DOCS] 2021-05-05 21:37:53 +05:30
.clang-format
.clang-tidy
.gitignore Remove .gitignore entries not relevant in the monorepo. 2021-04-07 12:25:02 -07:00
CMakeLists.txt
CODE_OWNERS.TXT
INSTALL.txt
LICENSE.TXT
ModuleInfo.txt
NOTES.txt
README.txt

//===----------------------------------------------------------------------===//
// C Language Family Front-end
//===----------------------------------------------------------------------===//

Welcome to Clang.  This is a compiler front-end for the C family of languages
(C, C++, Objective-C, and Objective-C++) which is built as part of the LLVM
compiler infrastructure project.

Unlike many other compiler frontends, Clang is useful for a number of things
beyond just compiling code: we intend for Clang to be host to a number of
different source-level tools.  One example of this is the Clang Static Analyzer.

If you're interested in more (including how to build Clang) it is best to read
the relevant web sites.  Here are some pointers:

Information on Clang:             http://clang.llvm.org/
Building and using Clang:         http://clang.llvm.org/get_started.html
Clang Static Analyzer:            http://clang-analyzer.llvm.org/
Information on the LLVM project:  http://llvm.org/

If you have questions or comments about Clang, a great place to discuss them is
on the Clang development mailing list:
  http://lists.llvm.org/mailman/listinfo/cfe-dev

If you find a bug in Clang, please file it in the LLVM bug tracker:
  http://llvm.org/bugs/