Auto merge of #23972 - gkoz:partial_eq_str_string, r=alexcrichton
Right now comparing a `&String` (or a `&Cow`) to a `&str` requires redundant borrowing of the latter. Implementing `PartialEq<str>` tries to avoid this limitation. ```rust struct Foo (String); fn main () { let s = Foo("foo".to_string()); match s { Foo(ref x) if x == &"foo" => println!("foo!"), // avoid this -----^ _ => {} } } ``` I was hoping that #23521 would solve this but it didn't work out.
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@ -796,9 +796,9 @@ impl<'a, 'b> Pattern<'a> for &'b String {
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#[stable(feature = "rust1", since = "1.0.0")]
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impl PartialEq for String {
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#[inline]
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fn eq(&self, other: &String) -> bool { PartialEq::eq(&**self, &**other) }
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fn eq(&self, other: &String) -> bool { PartialEq::eq(&self[..], &other[..]) }
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#[inline]
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fn ne(&self, other: &String) -> bool { PartialEq::ne(&**self, &**other) }
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fn ne(&self, other: &String) -> bool { PartialEq::ne(&self[..], &other[..]) }
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}
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macro_rules! impl_eq {
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@ -806,39 +806,41 @@ macro_rules! impl_eq {
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#[stable(feature = "rust1", since = "1.0.0")]
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impl<'a> PartialEq<$rhs> for $lhs {
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#[inline]
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fn eq(&self, other: &$rhs) -> bool { PartialEq::eq(&**self, &**other) }
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fn eq(&self, other: &$rhs) -> bool { PartialEq::eq(&self[..], &other[..]) }
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#[inline]
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fn ne(&self, other: &$rhs) -> bool { PartialEq::ne(&**self, &**other) }
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fn ne(&self, other: &$rhs) -> bool { PartialEq::ne(&self[..], &other[..]) }
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}
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#[stable(feature = "rust1", since = "1.0.0")]
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impl<'a> PartialEq<$lhs> for $rhs {
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#[inline]
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fn eq(&self, other: &$lhs) -> bool { PartialEq::eq(&**self, &**other) }
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fn eq(&self, other: &$lhs) -> bool { PartialEq::eq(&self[..], &other[..]) }
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#[inline]
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fn ne(&self, other: &$lhs) -> bool { PartialEq::ne(&**self, &**other) }
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fn ne(&self, other: &$lhs) -> bool { PartialEq::ne(&self[..], &other[..]) }
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}
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}
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}
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impl_eq! { String, str }
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impl_eq! { String, &'a str }
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impl_eq! { Cow<'a, str>, str }
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impl_eq! { Cow<'a, str>, String }
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#[stable(feature = "rust1", since = "1.0.0")]
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impl<'a, 'b> PartialEq<&'b str> for Cow<'a, str> {
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#[inline]
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fn eq(&self, other: &&'b str) -> bool { PartialEq::eq(&**self, &**other) }
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fn eq(&self, other: &&'b str) -> bool { PartialEq::eq(&self[..], &other[..]) }
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#[inline]
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fn ne(&self, other: &&'b str) -> bool { PartialEq::ne(&**self, &**other) }
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fn ne(&self, other: &&'b str) -> bool { PartialEq::ne(&self[..], &other[..]) }
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}
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#[stable(feature = "rust1", since = "1.0.0")]
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impl<'a, 'b> PartialEq<Cow<'a, str>> for &'b str {
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#[inline]
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fn eq(&self, other: &Cow<'a, str>) -> bool { PartialEq::eq(&**self, &**other) }
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fn eq(&self, other: &Cow<'a, str>) -> bool { PartialEq::eq(&self[..], &other[..]) }
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#[inline]
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fn ne(&self, other: &Cow<'a, str>) -> bool { PartialEq::ne(&**self, &**other) }
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fn ne(&self, other: &Cow<'a, str>) -> bool { PartialEq::ne(&self[..], &other[..]) }
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}
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#[unstable(feature = "collections", reason = "waiting on Str stabilization")]
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