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if $c:expr { Some($r:expr) } else { None } =>> $c.then(|| $r)

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Maybe Waffle
2023-02-15 11:43:41 +00:00
parent af3c8b2726
commit 8751fa1a9a
54 changed files with 159 additions and 281 deletions
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5
compiler/rustc_parse/src/parser/ty.rs
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@@ -450,8 +450,7 @@ impl<'a> Parser<'a> {
fn parse_borrowed_pointee(&mut self) -> PResult<'a, TyKind> {
let and_span = self.prev_token.span;
let mut opt_lifetime =
if self.check_lifetime() { Some(self.expect_lifetime()) } else { None };
let mut opt_lifetime = self.check_lifetime().then(|| self.expect_lifetime());
let mut mutbl = self.parse_mutability();
if self.token.is_lifetime() && mutbl == Mutability::Mut && opt_lifetime.is_none() {
// A lifetime is invalid here: it would be part of a bare trait bound, which requires
@@ -871,7 +870,7 @@ impl<'a> Parser<'a> {
None
};
let maybe = if self.eat(&token::Question) { Some(self.prev_token.span) } else { None };
let maybe = self.eat(&token::Question).then(|| self.prev_token.span);
Ok(BoundModifiers { maybe, maybe_const })
}