| // ignore-tidy-linelength |
| // This test checks that calling `mem::{uninitialized,zeroed}` with certain types results |
| // in a lint. |
| |
| #![feature(never_type)] |
| #![allow(deprecated)] |
| #![deny(invalid_value)] |
| |
| use std::mem::{self, MaybeUninit}; |
| |
| enum Void {} |
| |
| struct Ref(&'static i32); |
| struct RefPair((&'static i32, i32)); |
| |
| struct Wrap<T> { wrapped: T } |
| enum WrapEnum<T> { Wrapped(T) } |
| |
| #[allow(unused)] |
| fn generic<T: 'static>() { |
| unsafe { |
| let _val: &'static T = mem::zeroed(); //~ ERROR: does not permit zero-initialization |
| let _val: &'static T = mem::uninitialized(); //~ ERROR: does not permit being left uninitialized |
| |
| let _val: Wrap<&'static T> = mem::zeroed(); //~ ERROR: does not permit zero-initialization |
| let _val: Wrap<&'static T> = mem::uninitialized(); //~ ERROR: does not permit being left uninitialized |
| } |
| } |
| |
| fn main() { |
| unsafe { |
| let _val: ! = mem::zeroed(); //~ ERROR: does not permit zero-initialization |
| let _val: ! = mem::uninitialized(); //~ ERROR: does not permit being left uninitialized |
| |
| let _val: (i32, !) = mem::zeroed(); //~ ERROR: does not permit zero-initialization |
| let _val: (i32, !) = mem::uninitialized(); //~ ERROR: does not permit being left uninitialized |
| |
| let _val: Void = mem::zeroed(); //~ ERROR: does not permit zero-initialization |
| let _val: Void = mem::uninitialized(); //~ ERROR: does not permit being left uninitialized |
| |
| let _val: &'static i32 = mem::zeroed(); //~ ERROR: does not permit zero-initialization |
| let _val: &'static i32 = mem::uninitialized(); //~ ERROR: does not permit being left uninitialized |
| |
| let _val: Ref = mem::zeroed(); //~ ERROR: does not permit zero-initialization |
| let _val: Ref = mem::uninitialized(); //~ ERROR: does not permit being left uninitialized |
| |
| let _val: fn() = mem::zeroed(); //~ ERROR: does not permit zero-initialization |
| let _val: fn() = mem::uninitialized(); //~ ERROR: does not permit being left uninitialized |
| |
| let _val: Wrap<fn()> = mem::zeroed(); //~ ERROR: does not permit zero-initialization |
| let _val: Wrap<fn()> = mem::uninitialized(); //~ ERROR: does not permit being left uninitialized |
| |
| let _val: WrapEnum<fn()> = mem::zeroed(); //~ ERROR: does not permit zero-initialization |
| let _val: WrapEnum<fn()> = mem::uninitialized(); //~ ERROR: does not permit being left uninitialized |
| |
| let _val: Wrap<(RefPair, i32)> = mem::zeroed(); //~ ERROR: does not permit zero-initialization |
| let _val: Wrap<(RefPair, i32)> = mem::uninitialized(); //~ ERROR: does not permit being left uninitialized |
| |
| // Some types that should work just fine. |
| let _val: Option<&'static i32> = mem::zeroed(); |
| let _val: Option<fn()> = mem::zeroed(); |
| let _val: MaybeUninit<&'static i32> = mem::zeroed(); |
| let _val: bool = mem::zeroed(); |
| let _val: i32 = mem::zeroed(); |
| } |
| } |