a7091951f0
Swift-versioned API notes get applied at PCM constrution time relying on '-fapinotes-swift-version=X' argument to pick the appropriate version. This change adds a new APINotes application mode with '-fswift-version-independent-apinotes' which causes *all* versioned API notes to get recorded into the PCM wrapped in 'SwiftVersionedAttr' instances. The expectation in this mode is that the Swift client will perform the required transformations as per the API notes on the client side, when loading the PCM, instead of them getting applied on the producer side. This will allow the same PCM to be usable by Swift clients building with different language versions. In addition to versioned-wrapping the various existing API notes annotations which are carried in declaration attributes, this change adds a new attribute for two annotations which were previously applied directly to the declaration at the PCM producer side: 1) Type and 2) Nullability annotations with 'SwiftTypeAttr' and 'SwiftNullabilityAttr', respectively. The logic to apply these two annotations to a declaration is refactored into API.
C language Family Front-end
Welcome to Clang.
This is a compiler front-end for the C family of languages (C, 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 websites. 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 forums:
-
If you find a bug in Clang, please file it in the LLVM bug tracker: