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use bstr::{BStr, BString, ByteSlice};
use kstring::KStringRef;
use crate::{Name, NameRef};
impl<'a> NameRef<'a> {
/// Turn this ref into its owned counterpart.
pub fn to_owned(self) -> Name {
Name(self.0.into())
}
/// Return the inner `str`.
pub fn as_str(&self) -> &str {
self.0.as_str()
}
}
impl AsRef<str> for NameRef<'_> {
fn as_ref(&self) -> &str {
self.0.as_ref()
}
}
impl<'a> TryFrom<&'a BStr> for NameRef<'a> {
type Error = Error;
fn try_from(attr: &'a BStr) -> Result<Self, Self::Error> {
fn attr_valid(attr: &BStr) -> bool {
if attr.first() == Some(&b'-') {
return false;
}
attr.bytes()
.all(|b| matches!(b, b'-' | b'.' | b'_' | b'A'..=b'Z' | b'a'..=b'z' | b'0'..=b'9'))
}
attr_valid(attr)
.then(|| NameRef(KStringRef::from_ref(attr.to_str().expect("no illformed utf8"))))
.ok_or_else(|| Error { attribute: attr.into() })
}
}
impl<'a> Name {
/// Provide our ref-type.
pub fn as_ref(&'a self) -> NameRef<'a> {
NameRef(self.0.as_ref())
}
/// Return the inner `str`.
pub fn as_str(&self) -> &str {
self.0.as_str()
}
}
impl AsRef<str> for Name {
fn as_ref(&self) -> &str {
self.0.as_str()
}
}
/// The error returned by [`parse::Iter`][crate::parse::Iter].
#[derive(Debug, thiserror::Error)]
#[error("Attribute has non-ascii characters or starts with '-': {attribute}")]
pub struct Error {
/// The attribute that failed to parse.
pub attribute: BString,
}
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