hex-literal: add support for colon-delimited literals

hex-literal/CHANGELOG.md

@@ -4,6 +4,12 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## 1.1.0 (2025-10-29)
+### Added
+- Colon-delimited literals support ([#1244])
+
+[#1244]: https://github.com/RustCrypto/utils/pull/1244
+
 ## 1.0.0 (2025-02-22)
 ### Changed
 - Edition changed to 2024 and MSRV bumped to 1.85 ([#1149])

hex-literal/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "hex-literal"
-version = "1.0.0"
+version = "1.1.0"
 authors = ["RustCrypto Developers"]
 edition = "2024"
 rust-version = "1.85"

hex-literal/README.md

@@ -11,7 +11,7 @@ This crate provides the `hex!` macro for converting a sequence of hexadecimal st
 The macro accepts the following characters in input string literals:
 
 - `'0'...'9'`, `'a'...'f'`, `'A'...'F'` — hex characters which will be used in construction of the output byte array
-- `' '`, `'\r'`, `'\n'`, `'\t'` — formatting characters which will be ignored
+- `' '`, `:`, `'\r'`, `'\n'`, `'\t'` — formatting characters which will be ignored
 
 # Examples
 ```rust
@@ -26,6 +26,9 @@ assert_eq!(hex!("a1 b2 c3 d4"), [0xA1, 0xB2, 0xC3, 0xD4]);
 assert_eq!(hex!("E5 E6 90 92"), [0xE5, 0xE6, 0x90, 0x92]);
 assert_eq!(hex!("0a0B 0C0d"), [10, 11, 12, 13]);
 
+// Colon-delimited literals
+assert_eq!(hex!("0A:0B:0C:0D"), [10, 11, 12, 13]);
+
 // Multi-line literals
 let bytes1 = hex!("
     00010203 04050607

hex-literal/src/lib.rs

@@ -13,7 +13,7 @@ const fn next_hex_char(string: &[u8], mut pos: usize) -> Option<(u8, usize)> {
             b'0'..=b'9' => raw_val - 48,
             b'A'..=b'F' => raw_val - 55,
             b'a'..=b'f' => raw_val - 87,
-            b' ' | b'\r' | b'\n' | b'\t' => continue,
+            b' ' | b':' | b'\r' | b'\n' | b'\t' => continue,
             0..=127 => panic!("Encountered invalid ASCII character"),
             _ => panic!("Encountered non-ASCII character"),
         };