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//@ run-pass
#![feature(adt_const_params, unsized_const_params)]
#![allow(incomplete_features)]
pub fn function_with_str<const STRING: &'static str>() -> &'static str {
STRING
}
pub fn function_with_bytes<const BYTES: &'static [u8]>() -> &'static [u8] {
BYTES
}
// Also check the codepaths for custom DST
#[derive(std::marker::UnsizedConstParamTy, PartialEq, Eq)]
struct MyStr(str);
fn function_with_my_str<const S: &'static MyStr>() -> &'static MyStr {
S
}
impl MyStr {
const fn new(s: &'static str) -> &'static MyStr {
unsafe { std::mem::transmute(s) }
}
fn as_str(&self) -> &str {
&self.0
}
}
pub fn main() {
assert_eq!(function_with_str::<"Rust">(), "Rust");
assert_eq!(function_with_str::<"ℇ㇈↦">(), "ℇ㇈↦");
assert_eq!(function_with_bytes::<b"AAAA">(), &[0x41, 0x41, 0x41, 0x41]);
assert_eq!(function_with_bytes::<{ &[0x41, 0x41, 0x41, 0x41] }>(), b"AAAA");
assert_eq!(function_with_my_str::<{ MyStr::new("hello") }>().as_str(), "hello");
}
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