rust/src/test/ui/consts/const-needs_drop-monomorphic.rs
Tomasz Miąsko 894b42c861 Disallow non-monomorphic calls to needs_drop in interpreter
otherwise evaluation could change after further substitutions.
2021-06-05 18:28:25 +02:00

17 lines
475 B
Rust

// Check that evaluation of needs_drop<T> fails when T is not monomorphic.
#![feature(const_generics)]
#![allow(const_evaluatable_unchecked)]
#![allow(incomplete_features)]
struct Bool<const B: bool> {}
impl Bool<true> {
fn assert() {}
}
fn f<T>() {
Bool::<{ std::mem::needs_drop::<T>() }>::assert();
//~^ ERROR no function or associated item named `assert` found
//~| ERROR constant expression depends on a generic parameter
}
fn main() {
f::<u32>();
}