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//! Tagged element.
use std::borrow::Cow;
use std::str::Utf8Error;
use quick_xml::events::BytesStart;
use crate::attribute::Iter as AttributeIter;
/// The start tag of a tagged element.
///
/// The `<xyz foo="bar">` in `<xyz foo="bar">Hello</xyz>`
#[derive(Debug, Clone, PartialEq, Eq)]
pub struct TagStart<'a>
{
inner: BytesStart<'a>,
}
impl<'a> TagStart<'a>
{
/// Returns a new `TagStart`.
pub fn new(name: impl Into<Cow<'a, str>>) -> Self
{
Self {
inner: BytesStart::new(name),
}
}
/// Returns the name.
///
/// # Errors
/// Returns `Err` if the name is not valid UTF-8.
pub fn name(&self) -> Result<&str, Utf8Error>
{
std::str::from_utf8(self.name_bytes())
}
/// Returns the name as bytes.
#[must_use]
pub fn name_bytes(&self) -> &[u8]
{
let name_length = self.inner.name().as_ref().len();
&self.inner.as_ref()[..name_length]
}
/// Returns the tag attributes.
#[must_use]
pub fn attributes(&'a self) -> AttributeIter<'a>
{
AttributeIter::new(self.inner.attributes())
}
}
// Crate-local functions
impl<'a> TagStart<'a>
{
pub(crate) fn from_inner(inner: BytesStart<'a>) -> Self
{
Self { inner }
}
}
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