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# utf8_iter
[](https://crates.io/crates/utf8_iter)
[](https://docs.rs/utf8_iter/)
utf8_iter provides iteration by `char` over potentially-invalid UTF-8 `&[u8]`
such that UTF-8 errors are handled according to the WHATWG Encoding Standard.
Iteration by `Result<char,Utf8CharsError>` is provided as an alternative that
distinguishes UTF-8 errors from U+FFFD appearing in the input.
An implementation of `char_indices()` analogous to the same-name method on
`str` is also provided.
Key parts of the code are copypaste from the UTF-8 to UTF-16 conversion code
in `encoding_rs`, which was optimized for speed in the case of valid input.
The implementation here uses the structure that was found to be fast in the
`encoding_rs` context but the structure hasn't been benchmarked in this
context.
This is a `no_std` crate.
## Licensing
TL;DR: `Apache-2.0 OR MIT`
Please see the file named
[COPYRIGHT](https://github.com/hsivonen/utf8_iter/blob/master/COPYRIGHT).
## Documentation
Generated [API documentation](https://docs.rs/utf8_iter/) is available
online.
## Release Notes
### 1.0.4
* Add iteration by `Result<char,Utf8CharsError>`.
### 1.0.3
* Fix an error in documentation.
### 1.0.2
* `char_indices()` implementation.
### 1.0.1
* `as_slice()` method.
* Implement `DoubleEndedIterator`
### 1.0.0
The initial release.
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