It's not clear what this means, because a macro in item position can expand to zero or more items. For now we disallow it, which is technically a
[breaking-change]
but is landing without an RFC. The `pub` keyword previously had no effect, which seems quite unintended.
Fixes #18317.
Fixes #14660.
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| .. | ||
| lexer | ||
| attr.rs | ||
| classify.rs | ||
| common.rs | ||
| mod.rs | ||
| obsolete.rs | ||
| parser.rs | ||
| token.rs | ||