diff options
Diffstat (limited to 'src/test/ui/lint/dead-code/impl-trait.rs')
-rw-r--r-- | src/test/ui/lint/dead-code/impl-trait.rs | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/src/test/ui/lint/dead-code/impl-trait.rs b/src/test/ui/lint/dead-code/impl-trait.rs new file mode 100644 index 000000000..757b8f83e --- /dev/null +++ b/src/test/ui/lint/dead-code/impl-trait.rs @@ -0,0 +1,18 @@ +#![deny(dead_code)] + +trait Trait { + type Type; +} + +impl Trait for () { + type Type = (); +} + +type Used = (); +type Unused = (); //~ ERROR type alias `Unused` is never used + +fn foo() -> impl Trait<Type = Used> {} + +fn main() { + foo(); +} |