diff options
Diffstat (limited to 'vendor/unic-char-range/src/step.rs')
| -rw-r--r-- | vendor/unic-char-range/src/step.rs | 45 |
1 files changed, 0 insertions, 45 deletions
diff --git a/vendor/unic-char-range/src/step.rs b/vendor/unic-char-range/src/step.rs deleted file mode 100644 index 1140edd9e..000000000 --- a/vendor/unic-char-range/src/step.rs +++ /dev/null @@ -1,45 +0,0 @@ -// Copyright 2017 The UNIC Project Developers. -// -// See the COPYRIGHT file at the top-level directory of this distribution. -// -// 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. - -use core::char; - -pub const BEFORE_SURROGATE: char = '\u{D7FF}'; -pub const AFTER_SURROGATE: char = '\u{E000}'; - -#[inline] -#[allow(unsafe_code)] -/// Step a character one step towards `char::MAX`. -/// -/// # Safety -/// -/// If the given character is `char::MAX`, the return value is not a valid character. -pub unsafe fn forward(ch: char) -> char { - if ch == BEFORE_SURROGATE { - AFTER_SURROGATE - } else { - char::from_u32_unchecked(ch as u32 + 1) - } -} - -#[inline] -#[allow(unsafe_code)] -/// Step a character one step towards `'\0'`. -/// -/// # Safety -/// -/// If the given character is `'\0'`, this will cause an underflow. -/// (Thus, it will panic in debug mode, undefined behavior in release mode.) -pub unsafe fn backward(ch: char) -> char { - if ch == AFTER_SURROGATE { - BEFORE_SURROGATE - } else { - char::from_u32_unchecked(ch as u32 - 1) - } -} |