Mordante added a comment.
Thanks for implementing this @egorzhdan! Thanks @ldionne for the notification.
`-funstable` is an option that controls multiple flags therefore I think it
would be good to have a separate flag to opt-in for unstable/incomplete libc++
features. That makes it easier to _only_ opt-in to these features. Then
`-funstable` can also enable that flag. Maybe `-funstable-libc++` and adding a
feature `libcxx_unstable` that we can use in libc++ to detect that the flag was
set.
================
Comment at: clang/include/clang/Basic/LangOptions.def:153
LANGOPT(RelaxedTemplateTemplateArgs, 1, 0, "C++17 relaxed matching of template
template arguments")
+LANGOPT(Unstable , 1, 0, "Enable unstable and experimental features")
----------------
ldionne wrote:
> The documentation of this option should be way more beefy. Something like:
>
> ```
> Enable unstable and experimental language and library features.
>
> This option enables various language and library features that are either
> experimental (also known as TSes), or have been standardized but are not
> stable yet. This option should not be used in production code, since neither
> ABI nor API stability are guaranteed.
> ```
>
> We should also provide documentation inside
> `clang/docs/ClangCommandLineReference.rst`.
+1
================
Comment at: clang/lib/Driver/ToolChains/Clang.cpp:5770
+ if (!Args.hasArg(options::OPT_fno_coroutines_ts))
+ CmdArgs.push_back("-fcoroutines-ts");
+ CmdArgs.push_back("-fmodules-ts");
----------------
Is this option still useful? In LLVM 14 the `<coroutine>` header is no longer
experimental. The experimental header will soon be removed.
Repository:
rG LLVM Github Monorepo
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D120160/new/
https://reviews.llvm.org/D120160
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