| #![feature(no_core)] |
| #![no_core] |
| |
| #![feature(lang_items)] |
| #[lang = "sized"] |
| pub trait Sized {} |
| |
| #[lang = "fn_once"] |
| pub trait FnOnce<Args> { |
| #[lang = "fn_once_output"] |
| type Output; |
| |
| extern "rust-call" fn call_once(self, args: Args) -> Self::Output; |
| } |
| |
| pub fn takes_fn_generic<F: FnOnce(i32) -> i32>(a: i32, f: F) -> i32 { |
| f(a) |
| } |
| |
| pub fn takes_fn_generic_where<F>(a: i32, f: F) -> i32 |
| where |
| F: FnOnce(i32) -> i32, |
| { |
| f(a) |
| } |
| |
| pub fn test() { |
| let foo = |x: i32| -> i32 { x + 1 }; |
| |
| takes_fn_generic(1, foo); |
| takes_fn_generic_where(2, foo); |
| } |
