Improve spans on evaluated cfg_attrs.
#128133
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When converting something like `#![cfg_attr(cond, attr)]` into `#![attr]`, we currently duplicate the `#` token and the `!` token. But weirdly, there is also this comment: // We don't really have a good span to use for the synthesized `[]` // in `#[attr]`, so just use the span of the `#` token. Maybe that comment used to be true? But now it is false: we can duplicate the existing delimiters (and their spans and spacing), much like we do for the `#` and `!`. This commit does that, thus removing the incorrect comment, and improving the spans on `Group`s in a few proc-macro tests.
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…iaskrgr Rollup of 9 pull requests Successful merges: - rust-lang#126152 (size_of_val_raw: for length 0 this is safe to call) - rust-lang#127252 (Add edge-case examples to `{count,leading,trailing}_{ones,zeros}` methods) - rust-lang#127374 (Tweak "wrong # of generics" suggestions) - rust-lang#127457 (Make tidy fast without compromising case alternation) - rust-lang#127480 (Fix build failure on vxworks rust-lang#127084 ) - rust-lang#127733 (Replace some `mem::forget`'s with `ManuallyDrop`) - rust-lang#128120 (Gate `AsyncFn*` under `async_closure` feature) - rust-lang#128131 (Import `c_void` rather than using the full path) - rust-lang#128133 (Improve spans on evaluated `cfg_attr`s.) r? `@ghost` `@rustbot` modify labels: rollup
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Rollup merge of rust-lang#128133 - nnethercote:fix-cfg_attr-spans, r=petrochenkov Improve spans on evaluated `cfg_attr`s. When converting something like `#![cfg_attr(cond, attr)]` into `#![attr]`, we currently duplicate the `#` token and the `!` token. But weirdly, there is also this comment: // We don't really have a good span to use for the synthesized `[]` // in `#[attr]`, so just use the span of the `#` token. Maybe that comment used to be true? But now it is false: we can duplicate the existing delimiters (and their spans and spacing), much like we do for the `#` and `!`. This commit does that, thus removing the incorrect comment, and improving the spans on `Group`s in a few proc-macro tests. `@petrochenkov`
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When converting something like
#![cfg_attr(cond, attr)]into#![attr], we currently duplicate the#token and the!token. But weirdly, there is also this comment:// We don't really have a good span to use for the synthesized
[]// in
#[attr], so just use the span of the#token.Maybe that comment used to be true? But now it is false: we can duplicate the existing delimiters (and their spans and spacing), much like we do for the
#and!.This commit does that, thus removing the incorrect comment, and improving the spans on
Groups in a few proc-macro tests.@petrochenkov