Allow try-blocks in places where an open delim is expected
#70657
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rust-highfive
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Centril
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src/librustc_lint/unused.rs
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| @@ -371,7 +371,7 @@ trait UnusedDelimLint { | |||
| fn is_expr_delims_necessary(inner: &ast::Expr, followed_by_block: bool) -> bool { | |||
| followed_by_block | |||
| && match inner.kind { | |||
| ast::ExprKind::Ret(_) | ast::ExprKind::Break(..) => true, | |||
| ExprKind::Ret(_) | ExprKind::Break(..) | ExprKind::TryBlock(_) => true, | |||
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This feels like a parser bug to me. We have:
fn is_try_block(&self) -> bool {
self.token.is_keyword(kw::Try) &&
self.look_ahead(1, |t| *t == token::OpenDelim(token::Brace)) &&
self.token.uninterpolated_span().rust_2018() &&
// Prevent `while try {} {}`, `if try {} {} else {}`, etc.
!self.restrictions.contains(Restrictions::NO_STRUCT_LITERAL)
}but we allow this for unsafe {}, async {}, etc.
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Waited for a comment by @petrochenkov on this, as this changes the purpose of this PR. I changed the parser to allow try in scrutinee position/in places where open braces are expected. // This now compiles
match try {} {
Ok(()) | Err(()) => (),
} |
lcnr
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try-blocks in places where an open delim is expected
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Did you intend to include that submodule bump? |
|
I rarely do 😆 thank you for catching this |
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Allow `try`-blocks in places where an open delim is expected Closes rust-lang#70490 Closes rust-lang#56828 r? @Centril
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Rollup of 8 pull requests Successful merges: - rust-lang#70657 (Allow `try`-blocks in places where an open delim is expected) - rust-lang#70947 (tighten CTFE safety net for accesses to globals) - rust-lang#70949 (simplify `vec!` macro) - rust-lang#71002 (fix target & runtool args order) - rust-lang#71082 (ptr: introduce len() method on raw slices) - rust-lang#71128 (Remove unused single_step flag) - rust-lang#71133 (Tighten time complexity on the doc of sort_by_key) - rust-lang#71135 (Update books) Failed merges: r? @ghost
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Closes #70490
Closes #56828
r? @Centril