3 const fn foo<T>() -> usize {
4 // We might instead branch on `std::mem::size_of::<*mut T>() < 8` here,
5 // which would cause this function to fail on 32 bit systems.
7 std::mem::size_of::<T>()
14 let _ = [0; foo::<T>()];
15 //~^ WARN cannot use constants which depend on generic parameters in types
16 //~| WARN this was previously accepted by the compiler but is being phased out