mirror of https://github.com/rust-lang/rust
41 lines
1016 B
Rust
41 lines
1016 B
Rust
//@ run-pass
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#![feature(adt_const_params)]
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#![allow(incomplete_features)]
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pub fn function_with_str<const STRING: &'static str>() -> &'static str {
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STRING
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}
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pub fn function_with_bytes<const BYTES: &'static [u8]>() -> &'static [u8] {
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BYTES
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}
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// Also check the codepaths for custom DST
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#[derive(PartialEq, Eq)]
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struct MyStr(str);
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impl std::marker::ConstParamTy for MyStr {}
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fn function_with_my_str<const S: &'static MyStr>() -> &'static MyStr {
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S
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}
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impl MyStr {
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const fn new(s: &'static str) -> &'static MyStr {
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unsafe { std::mem::transmute(s) }
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}
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fn as_str(&self) -> &str {
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&self.0
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}
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}
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pub fn main() {
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assert_eq!(function_with_str::<"Rust">(), "Rust");
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assert_eq!(function_with_str::<"ℇ㇈↦">(), "ℇ㇈↦");
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assert_eq!(function_with_bytes::<b"AAAA">(), &[0x41, 0x41, 0x41, 0x41]);
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assert_eq!(function_with_bytes::<{&[0x41, 0x41, 0x41, 0x41]}>(), b"AAAA");
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assert_eq!(function_with_my_str::<{ MyStr::new("hello") }>().as_str(), "hello");
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}
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