diff options
Diffstat (limited to 'tests/ui/let-else/let-else-binding-explicit-mut.rs')
-rw-r--r-- | tests/ui/let-else/let-else-binding-explicit-mut.rs | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/tests/ui/let-else/let-else-binding-explicit-mut.rs b/tests/ui/let-else/let-else-binding-explicit-mut.rs new file mode 100644 index 000000000..a153b3af0 --- /dev/null +++ b/tests/ui/let-else/let-else-binding-explicit-mut.rs @@ -0,0 +1,20 @@ +// from rfc2005 test suite + + + +// Verify the binding mode shifts - only when no `&` are auto-dereferenced is the +// final default binding mode mutable. + +fn main() { + let Some(n) = &&Some(5i32) else { return }; + *n += 1; //~ ERROR cannot assign to `*n`, which is behind a `&` reference + let _ = n; + + let Some(n) = &mut &Some(5i32) else { return }; + *n += 1; //~ ERROR cannot assign to `*n`, which is behind a `&` reference + let _ = n; + + let Some(n) = &&mut Some(5i32) else { return }; + *n += 1; //~ ERROR cannot assign to `*n`, which is behind a `&` reference + let _ = n; +} |