// run-pass #![feature(test)] extern crate test; use test::black_box as b; // prevent promotion of the argument and const-propagation of the result const BE_U32: u32 = 55u32.to_be(); const LE_U32: u32 = 55u32.to_le(); fn main() { assert_eq!(BE_U32, b(55u32).to_be()); assert_eq!(LE_U32, b(55u32).to_le()); #[cfg(not(target_os = "emscripten"))] { const BE_U128: u128 = 999999u128.to_be(); const LE_I128: i128 = (-999999i128).to_le(); assert_eq!(BE_U128, b(999999u128).to_be()); assert_eq!(LE_I128, b(-999999i128).to_le()); } }