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1 // Copyright 2016 The Rust Project Developers. See the COPYRIGHT
2 // file at the top-level directory of this distribution and at
3 // http://rust-lang.org/COPYRIGHT.
5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
8 // option. This file may not be copied, modified, or distributed
9 // except according to those terms.
13 // Provide some more formatting options for some data types (at the moment
14 // that's just `{:x}` for slices of u8).
16 pub struct FmtWrap
<T
>(pub T
);
18 impl<'a
> fmt
::LowerHex
for FmtWrap
<&'a
[u8]> {
19 fn fmt(&self, formatter
: &mut fmt
::Formatter
) -> fmt
::Result
{
20 for byte
in self.0.iter
() {
21 try
!(write
!(formatter
, "{:02x}", byte
));
29 let bytes
: &[u8] = &[0x01, 0x23, 0x45, 0x67, 0x89, 0xab, 0xcd, 0xef];
30 assert_eq
!("0123456789abcdef", &format
!("{:x}", FmtWrap(bytes
)));