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| author | Simon Sapin <simon.sapin@exyr.org> | 2018-03-13 14:08:15 +0100 |
|---|---|---|
| committer | Simon Sapin <simon.sapin@exyr.org> | 2018-03-13 14:53:06 +0100 |
| commit | 4897935e8645e5f1d9d9ef61c78a1cb019c44f89 (patch) | |
| tree | d32522f913ff690cfe6893ffe68d04d0ca2c2008 /src/liballoc | |
| parent | 883e74645d350b6752cb94d48f46363f6f8789e9 (diff) | |
| download | rust-4897935e8645e5f1d9d9ef61c78a1cb019c44f89.tar.gz rust-4897935e8645e5f1d9d9ef61c78a1cb019c44f89.zip | |
Add hexadecimal formatting of integers with fmt::Debug
This can be used for integers within a larger types which implements Debug
(possibly through derive) but not fmt::UpperHex or fmt::LowerHex.
```rust
assert!(format!("{:02x?}", b"Foo\0") == "[46, 6f, 6f, 00]");
assert!(format!("{:02X?}", b"Foo\0") == "[46, 6F, 6F, 00]");
```
RFC: https://github.com/rust-lang/rfcs/pull/2226
Diffstat (limited to 'src/liballoc')
| -rw-r--r-- | src/liballoc/fmt.rs | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/src/liballoc/fmt.rs b/src/liballoc/fmt.rs index a092bfb3b0a..2c4cdef03b0 100644 --- a/src/liballoc/fmt.rs +++ b/src/liballoc/fmt.rs @@ -113,6 +113,8 @@ //! //! * *nothing* ⇒ [`Display`] //! * `?` ⇒ [`Debug`] +//! * `x?` ⇒ [`Debug`] with lower-case hexadecimal integers +//! * `X?` ⇒ [`Debug`] with lower-case hexadecimal integers //! * `o` ⇒ [`Octal`](trait.Octal.html) //! * `x` ⇒ [`LowerHex`](trait.LowerHex.html) //! * `X` ⇒ [`UpperHex`](trait.UpperHex.html) |