data-encoding-macro 0.1.5

Macros for data-encoding

This library provides macros to define compile-time byte slices and arrays from encoded strings (using common bases like base64, base32, or hexadecimal, and also custom bases). It also provides a macro to define compile-time custom encodings to be used with the data-encoding crate.

If you were familiar with the binary_macros crate, this library is actually inspired from it.

If you use a nightly compiler, you may disable the "stable" feature:

data-encoding-macro = { version = "0.1.5", default-features = false }


You can define a compile-time byte slice or array (using the hexlower or base64 macros for example):

const HELLO: &'static [u8] = &hexlower!("68656c6c6f");
const FOOBAR: &'static [u8] = &base64!("Zm9vYmFy");
// In nightly, it is possible to define an array instead of a slice:
hexlower_array!("const HELLO" = "68656c6c6f");
base64_array!("const FOOBAR" = "Zm9vYmFy");

You can define a compile-time custom encoding using the new_encoding macro:

const HEX: Encoding = new_encoding!{
    symbols: "0123456789abcdef",
    translate_from: "ABCDEF",
    translate_to: "abcdef",
const BASE64: Encoding = new_encoding!{
    symbols: "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/",
    padding: '=',

See the documentation for more details.