Tatsuya Kawano tatsuya6502
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| use std::rc::Rc; | |
| trait HKT<U> { | |
| type C; // Current type | |
| type T; // Type with C swapped with U | |
| } | |
| macro_rules! derive_hkt { | |
| ($t:ident) => { | |
| impl<T, U> HKT<U> for $t<T> { |