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use bstr::{BStr, ByteSlice};
/// An unvalidated parse result of a key for a section, parsing input like `remote.origin` or `core`.
#[derive(Debug, PartialEq, Ord, PartialOrd, Eq, Hash, Clone, Copy)]
pub struct Key<'a> {
/// The name of the section, like `remote` in `remote.origin`.
pub section_name: &'a str,
/// The name of the sub-section, like `origin` in `remote.origin`.
pub subsection_name: Option<&'a BStr>,
}
impl<'a> Key<'a> {
/// Parse `input` like `remote.origin` or `core` as a `Key` to make its section specific fields available,
/// or `None` if there were not one or two tokens separated by `.`.
/// Note that `input` isn't validated, and is `str` as ascii is a subset of UTF-8 which is required for any valid keys.
pub fn parse(input: impl Into<&'a BStr>) -> Option<Self> {
let input = input.into();
let mut tokens = input.splitn(2, |b| *b == b'.');
Some(Key {
section_name: tokens.next()?.to_str().ok()?,
subsection_name: tokens.next().map(Into::into),
})
}
}
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