rust/tests/ui/variance/variance-unused-region-param.rs

// Test that we report an error for unused type parameters in types.

struct SomeStruct<'a> { x: u32 } //~ ERROR parameter `'a` is never used
enum SomeEnum<'a> { Nothing } //~ ERROR parameter `'a` is never used
trait SomeTrait<'a> { fn foo(&self); } // OK on traits.

fn main() {}
Introduce the new phantomdata/phantomfn markers and integrate them into variance inference; fix various bugs in variance inference so that it considers the correct set of constraints; modify infer to consider the results of variance inference for type arguments. 2015-02-12 10:16:02 +00:00			`// Test that we report an error for unused type parameters in types.`

			struct SomeStruct<'a> { x: u32 } //~ ERROR parameter `'a` is never used
			enum SomeEnum<'a> { Nothing } //~ ERROR parameter `'a` is never used
Fallout in tests 2015-03-31 23:58:01 +00:00			`trait SomeTrait<'a> { fn foo(&self); } // OK on traits.`
Introduce the new phantomdata/phantomfn markers and integrate them into variance inference; fix various bugs in variance inference so that it considers the correct set of constraints; modify infer to consider the results of variance inference for type arguments. 2015-02-12 10:16:02 +00:00
			`fn main() {}`