37 lines
763 B
Rust
37 lines
763 B
Rust
//@ check-pass
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#![allow(incomplete_features)]
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#![feature(const_trait_impl, generic_const_exprs)]
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#[const_trait]
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trait ConstName {
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const NAME_BYTES: &'static [u8];
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}
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impl const ConstName for u8 {
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const NAME_BYTES: &'static [u8] = b"u8";
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}
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const fn name_len<T: ?Sized + ConstName>() -> usize {
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T::NAME_BYTES.len()
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}
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impl<T: ?Sized + ConstName> const ConstName for &T
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where
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[(); name_len::<T>()]:,
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{
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const NAME_BYTES: &'static [u8] = b"&T";
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}
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impl<T: ?Sized + ConstName> const ConstName for &mut T
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where
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[(); name_len::<T>()]:,
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{
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const NAME_BYTES: &'static [u8] = b"&mut T";
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}
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pub const ICE_1: &'static [u8] = <&&mut u8 as ConstName>::NAME_BYTES;
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pub const ICE_2: &'static [u8] = <&mut &u8 as ConstName>::NAME_BYTES;
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fn main() {}
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