diff options
Diffstat (limited to 'src/test/ui/reachable/expr_assign.rs')
-rw-r--r-- | src/test/ui/reachable/expr_assign.rs | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/src/test/ui/reachable/expr_assign.rs b/src/test/ui/reachable/expr_assign.rs new file mode 100644 index 000000000..e547f75e2 --- /dev/null +++ b/src/test/ui/reachable/expr_assign.rs @@ -0,0 +1,29 @@ +#![feature(never_type)] +#![allow(unused_variables)] +#![allow(unused_assignments)] +#![allow(dead_code)] +#![deny(unreachable_code)] + +fn foo() { + // No error here. + let x; + x = return; //~ ERROR unreachable +} + +fn bar() { + use std::ptr; + let p: *mut ! = ptr::null_mut::<!>(); + unsafe { + // Here we consider the `return` unreachable because + // "evaluating" the `*p` has type `!`. This is somewhat + // dubious, I suppose. + *p = return; //~ ERROR unreachable + } +} + +fn baz() { + let mut i = 0; + *{return; &mut i} = 22; //~ ERROR unreachable +} + +fn main() { } |