pub trait U8UtfExt {
// Required methods
fn extra_utf8_bytes(self) -> Result<usize, InvalidUtf8FirstByte>;
fn extra_utf8_bytes_unchecked(self) -> usize;
}Expand description
Methods for working with u8s as UTF-8 bytes.
Required Methods§
Sourcefn extra_utf8_bytes(self) -> Result<usize, InvalidUtf8FirstByte>
fn extra_utf8_bytes(self) -> Result<usize, InvalidUtf8FirstByte>
How many more bytes will you need to complete this codepoint?
§Errors
An error is returned if the byte is not a valid start of an UTF-8 codepoint:
128..192: ContinuationByte248..: TooLongSequence
Values in 244..248 represent a too high codepoint, but do not cause an error.
Sourcefn extra_utf8_bytes_unchecked(self) -> usize
fn extra_utf8_bytes_unchecked(self) -> usize
How many more bytes will you need to complete this codepoint?
This function assumes that the byte is a valid UTF-8 start, and might return any value otherwise. (but the function is pure and safe to call with any value).