forked from OSchip/llvm-project
4295ae96cd
Clang exposes an interface for extending the PCM/PCH file format: `ModuleFileExtension`. Clang itself has only a single implementation of the interface: `TestModuleFileExtension` that can be instantiated via the `-ftest-module-file_extension=` command line argument (and is stored in `FrontendOptions::ModuleFileExtensions`). Clients of the Clang library can extend the PCM/PCH file format by pushing an instance of their extension class to the `FrontendOptions::ModuleFileExtensions` vector. When generating the `-ftest-module-file_extension=` command line argument from `FrontendOptions`, a downcast is used to distinguish between the Clang's testing extension and other (client) extensions. This functionality is enabled by LLVM-style RTTI. However, this style of RTTI is hard to extend, as it requires patching Clang (adding new case to the `ModuleFileExtensionKind` enum). This patch switches to the LLVM RTTI for open class hierarchies, which allows libClang users (e.g. Swift) to create implementations of `ModuleFileExtension` without patching Clang. (Documentation of the feature: https://llvm.org/docs/HowToSetUpLLVMStyleRTTI.html#rtti-for-open-class-hierarchies) Reviewed By: artemcm Differential Revision: https://reviews.llvm.org/D97702 |
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| .. | ||
| AST | ||
| ASTMatchers | ||
| Analysis | ||
| Basic | ||
| CodeGen | ||
| CrossTU | ||
| DirectoryWatcher | ||
| Driver | ||
| Format | ||
| Frontend | ||
| Index | ||
| Lex | ||
| Rename | ||
| Rewrite | ||
| Sema | ||
| Serialization | ||
| StaticAnalyzer | ||
| Tooling | ||
| libclang | ||
| CMakeLists.txt | ||