mirror of https://github.com/rust-lang/rust
41 lines
915 B
Rust
41 lines
915 B
Rust
//@ check-pass
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//! An array must have the correct length.
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#![crate_type = "lib"]
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#![feature(transmutability)]
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#![allow(dead_code, incomplete_features, non_camel_case_types)]
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mod assert {
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use std::mem::{Assume, BikeshedIntrinsicFrom};
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pub fn array_like<T, E, const N: usize>()
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where
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T: BikeshedIntrinsicFrom<[E; N], { Assume::SAFETY }>,
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[E; N]: BikeshedIntrinsicFrom<T, { Assume::SAFETY }>
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{}
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}
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fn len_0() {
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type Array = [u8; 0];
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#[repr(C)] struct Struct();
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assert::array_like::<Struct, u8, 0>();
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}
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fn len_1() {
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type Array = [u8; 1];
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#[repr(C)] struct Struct(u8);
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assert::array_like::<Struct, u8, 1>();
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}
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fn len_2() {
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type Array = [u8; 2];
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#[repr(C)] struct Struct(u8, u8);
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assert::array_like::<Struct, u8, 2>();
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}
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fn len_3() {
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type Array = [u8; 3];
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#[repr(C)] struct Struct(u8, u8, u8);
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assert::array_like::<Struct, u8, 3>();
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}
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