| // Copyright 2018 The Rust Project Developers. See the COPYRIGHT |
| // file at the top-level directory of this distribution and at |
| // http://rust-lang.org/COPYRIGHT. |
| // |
| // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or |
| // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license |
| // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your |
| // option. This file may not be copied, modified, or distributed |
| // except according to those terms. |
| |
| #![feature(const_int_conversion, const_int_ops, reverse_bits)] |
| |
| const REVERSE: u32 = 0x12345678_u32.reverse_bits(); |
| const FROM_BE_BYTES: i32 = i32::from_be_bytes([0x12, 0x34, 0x56, 0x78]); |
| const FROM_LE_BYTES: i32 = i32::from_le_bytes([0x12, 0x34, 0x56, 0x78]); |
| const FROM_NE_BYTES: i32 = i32::from_be(i32::from_ne_bytes([0x80, 0, 0, 0])); |
| const TO_BE_BYTES: [u8; 4] = 0x12_34_56_78_i32.to_be_bytes(); |
| const TO_LE_BYTES: [u8; 4] = 0x12_34_56_78_i32.to_le_bytes(); |
| const TO_NE_BYTES: [u8; 4] = i32::min_value().to_be().to_ne_bytes(); |
| |
| fn ident<T>(ident: T) -> T { |
| ident |
| } |
| |
| fn main() { |
| assert_eq!(REVERSE, ident(0x1e6a2c48)); |
| assert_eq!(FROM_BE_BYTES, ident(0x12_34_56_78)); |
| assert_eq!(FROM_LE_BYTES, ident(0x78_56_34_12)); |
| assert_eq!(FROM_NE_BYTES, ident(i32::min_value())); |
| assert_eq!(TO_BE_BYTES, ident([0x12, 0x34, 0x56, 0x78])); |
| assert_eq!(TO_LE_BYTES, ident([0x78, 0x56, 0x34, 0x12])); |
| assert_eq!(TO_NE_BYTES, ident([0x80, 0, 0, 0])); |
| } |
| |
