Allow semicolon after closure within parentheses in macros#103224
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bors merged 1 commit intorust-lang:masterfrom Oct 22, 2022
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Allow semicolon after closure within parentheses in macros#103224bors merged 1 commit intorust-lang:masterfrom
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Could we add a helper method for checks like this to make it more readable?
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I can if you want, but given that this is a hack, I don't want to necessarily encourage more use-cases of this within the parser. Thoughts?
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It looks like there are no other places using this. I guess add a comment explaining what this means and then r= me.
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@bors r+ rollup |
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Rollup of 7 pull requests Successful merges: - rust-lang#102602 (Slightly tweak comments wrt `lint_overflowing_range_endpoint`) - rust-lang#103190 (rustdoc: render bounds of cross-crate GAT params) - rust-lang#103224 (Allow semicolon after closure within parentheses in macros) - rust-lang#103280 ((rust-lang#102929) Implement `String::leak` (attempt 2)) - rust-lang#103329 (Add a forgotten check for NonNull::new_unchecked's precondition) - rust-lang#103346 (Adjust argument type for mutable with_metadata_of (rust-lang#75091)) - rust-lang#103360 (Reduce false positives in msys2 detection) Failed merges: r? `@ghost` `@rustbot` modify labels: rollup
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#88546 added some parsing logic that if we're parsing a closure, and we're within parentheses, and a semicolon follows, then we must be parsing something erroneous like:
f(|| a; b), so it replaces the closure body with an error expression. However, it's valid to parse those tokens if we're within a macro, as in #103222.This is a bit unsatisfying fix. Is there a more robust way of checking that we're within a macro?
I would also be open to removing this "It is likely that the closure body is a block but where the braces have been removed" check altogether at the expense of more verbose errors, since it seems very suspicious in the first place...
Fixes #103222.