Add FIXME comment

FabianWolff · FabianWolff · commit 95344c02fd72 · 2022-01-31T20:34:26.000+01:00
diff --git a/compiler/rustc_typeck/src/check/pat.rs b/compiler/rustc_typeck/src/check/pat.rs
@@ -2047,6 +2047,9 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
                             );
                             None
                         }
+                        // FIXME: instead of checking for Vec only, we could check whether the
+                        // type implements `Deref<Target=X>`; see
+                        // https://github.com/rust-lang/rust/pull/91343#discussion_r761466979
                         ty::Adt(adt_def, _)
                             if self.tcx.is_diagnostic_item(sym::Vec, adt_def.did) =>
                         {

Original file line number	Diff line number	Diff line change
`@@ -2047,6 +2047,9 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {`
`2047`	`2047`	`);`
`2048`	`2048`	`None`
`2049`	`2049`	`}`
	`2050`	`+ // FIXME: instead of checking for Vec only, we could check whether the`
	`2051`	+ // type implements `Deref<Target=X>`; see
	`2052`	`+ // https://github.com/rust-lang/rust/pull/91343#discussion_r761466979`
`2050`	`2053`	`ty::Adt(adt_def, _)`
`2051`	`2054`	`if self.tcx.is_diagnostic_item(sym::Vec, adt_def.did) =>`
`2052`	`2055`	`{`