3a8621d681
expand: Leave traces when expanding `cfg` attributes This is the same as https://github.com/rust-lang/rust/pull/138515, but for `cfg(true)` instead of `cfg_attr`. The difference is that `cfg(true)`s already left "traces" after themselves - the `cfg` attributes themselves, with `expanded_inert_attrs` set to true, with full tokens, available to proc macros. This is not a reasonably expected behavior, but it could not be removed without a replacement, because a [major rustdoc feature](https://github.com/rust-lang/rfcs/pull/3631) and a number of clippy lints rely on it. This PR implements a replacement. This needs a crater run, because it changes observable behavior (in an intended way) - proc macros can no longer see expanded `cfg(true)` attributes. (Some minor unnecessary special casing for `sym::cfg_attr` is also removed in this PR.) r? `@nnethercote` |
||
|---|---|---|
| .. | ||
| mbe | ||
| base.rs | ||
| build.rs | ||
| config.rs | ||
| errors.rs | ||
| expand.rs | ||
| lib.rs | ||
| mbe.rs | ||
| module.rs | ||
| placeholders.rs | ||
| proc_macro.rs | ||
| proc_macro_server.rs | ||