rust/tests/ui/polymorphization/issue-74614.rs

// compile-flags:-Zpolymorphize=on
// build-pass

fn test<T>() {
    std::mem::size_of::<T>();
}

pub fn foo<T>(_: T) -> &'static fn() {
    &(test::<T> as fn())
}

fn outer<T>() {
    foo(|| ());
}

fn main() {
    outer::<u8>();
}
interp: needs_subst -> ensure_monomorphic_enough This commit adds a `ensure_monomorphic_enough` utility function which checks whether a type needs substitution, but only for parameters that the `unused_generic_params` query considers used. `ensure_monomorphic_enough` is then used throughout interpret where `needs_subst` checks previously existed (in particular, for some pointer casts and for reflection intrinsics more precise). Signed-off-by: David Wood <david@davidtw.co> 2020-07-24 12:16:54 +00:00			`// compile-flags:-Zpolymorphize=on`
tests: add regression test for #74614 This commit adds a regression test for #74614 so that it is fixed before polymorphisation is re-enabled. Signed-off-by: David Wood <david@davidtw.co> 2020-07-22 14:35:52 +00:00			`// build-pass`

			`fn test<T>() {`
			`std::mem::size_of::<T>();`
			`}`

			`pub fn foo<T>(_: T) -> &'static fn() {`
			`&(test::<T> as fn())`
			`}`

			`fn outer<T>() {`
			`foo(\|\| ());`
			`}`

			`fn main() {`
			`outer::<u8>();`
			`}`