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use core::cmp::Ordering;
use core::hash::{Hash, Hasher};
use core::fmt;
#[derive(Debug)]
#[repr(transparent)]
pub struct UncasedStr(str);
impl UncasedStr {
#[inline(always)]
pub fn new(string: &str) -> &UncasedStr {
unsafe { &*(string as *const str as *const UncasedStr) }
}
#[inline(always)]
pub fn as_str(&self) -> &str {
&self.0
}
#[inline(always)]
pub fn len(&self) -> usize {
self.as_str().len()
}
#[inline(always)]
pub fn starts_with(&self, string: &str) -> bool {
self.len() >= string.len() && self[..string.len()] == string
}
#[inline(always)]
#[cfg(feature = "alloc")]
#[cfg_attr(nightly, doc(cfg(feature = "alloc")))]
pub fn into_uncased(self: alloc::boxed::Box<UncasedStr>) -> crate::Uncased<'static> {
unsafe {
let raw_str = alloc::boxed::Box::into_raw(self) as *mut str;
crate::Uncased::from(alloc::boxed::Box::from_raw(raw_str).into_string())
}
}
}
impl<I: core::slice::SliceIndex<str, Output=str>> core::ops::Index<I> for UncasedStr {
type Output = UncasedStr;
#[inline]
fn index(&self, index: I) -> &Self::Output {
self.as_str()[index].into()
}
}
impl PartialEq for UncasedStr {
#[inline(always)]
fn eq(&self, other: &UncasedStr) -> bool {
self.0.eq_ignore_ascii_case(&other.0)
}
}
impl PartialEq<str> for UncasedStr {
#[inline(always)]
fn eq(&self, other: &str) -> bool {
self.0.eq_ignore_ascii_case(other)
}
}
impl PartialEq<UncasedStr> for str {
#[inline(always)]
fn eq(&self, other: &UncasedStr) -> bool {
other.0.eq_ignore_ascii_case(self)
}
}
impl PartialEq<&str> for UncasedStr {
#[inline(always)]
fn eq(&self, other: &&str) -> bool {
self.0.eq_ignore_ascii_case(other)
}
}
impl PartialEq<UncasedStr> for &str {
#[inline(always)]
fn eq(&self, other: &UncasedStr) -> bool {
other.0.eq_ignore_ascii_case(self)
}
}
impl<'a> From<&'a str> for &'a UncasedStr {
#[inline(always)]
fn from(string: &'a str) -> &'a UncasedStr {
UncasedStr::new(string)
}
}
impl Eq for UncasedStr { }
impl Hash for UncasedStr {
#[inline(always)]
fn hash<H: Hasher>(&self, hasher: &mut H) {
self.0.bytes().for_each(|b| hasher.write_u8(b.to_ascii_lowercase()));
}
}
impl PartialOrd for UncasedStr {
#[inline(always)]
fn partial_cmp(&self, other: &UncasedStr) -> Option<Ordering> {
Some(self.cmp(other))
}
}
impl Ord for UncasedStr {
fn cmp(&self, other: &Self) -> Ordering {
let self_chars = self.0.chars().map(|c| c.to_ascii_lowercase());
let other_chars = other.0.chars().map(|c| c.to_ascii_lowercase());
self_chars.cmp(other_chars)
}
}
impl fmt::Display for UncasedStr {
#[inline(always)]
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
self.0.fmt(f)
}
}