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

2023-02-15 11:43:41 +00:00
parent af3c8b2726
commit 8751fa1a9a
54 changed files with 159 additions and 281 deletions
--- a/compiler/rustc_parse/src/parser/path.rs
+++ b/compiler/rustc_parse/src/parser/path.rs
@@ -404,7 +404,7 @@ impl<'a> Parser<'a> {

        let is_first_invocation = style == PathStyle::Expr;
        // Take a snapshot before attempting to parse - we can restore this later.
-        let snapshot = if is_first_invocation { Some(self.clone()) } else { None };
+        let snapshot = is_first_invocation.then(|| self.clone());

        debug!("parse_generic_args_with_leading_angle_bracket_recovery: (snapshotting)");
        match self.parse_angle_args(ty_generics) {