diff options
Diffstat (limited to 'src/test/ui/let-else/let-else-binding-explicit-mut-annotated.rs')
-rw-r--r-- | src/test/ui/let-else/let-else-binding-explicit-mut-annotated.rs | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/src/test/ui/let-else/let-else-binding-explicit-mut-annotated.rs b/src/test/ui/let-else/let-else-binding-explicit-mut-annotated.rs new file mode 100644 index 000000000..b65fa13c1 --- /dev/null +++ b/src/test/ui/let-else/let-else-binding-explicit-mut-annotated.rs @@ -0,0 +1,16 @@ +// from rfc2005 test suite + +#![feature(let_else)] + +// Verify the binding mode shifts - only when no `&` are auto-dereferenced is the +// final default binding mode mutable. + +fn main() { + let Some(n): &mut Option<i32> = &&Some(5i32) else { return }; //~ ERROR mismatched types + *n += 1; + let _ = n; + + let Some(n): &mut Option<i32> = &&mut Some(5i32) else { return }; //~ ERROR mismatched types + *n += 1; + let _ = n; +} |