diff options
Diffstat (limited to 'src/test/ui/associated-type-bounds/union-bounds.rs')
-rw-r--r-- | src/test/ui/associated-type-bounds/union-bounds.rs | 123 |
1 files changed, 123 insertions, 0 deletions
diff --git a/src/test/ui/associated-type-bounds/union-bounds.rs b/src/test/ui/associated-type-bounds/union-bounds.rs new file mode 100644 index 000000000..46e5aef04 --- /dev/null +++ b/src/test/ui/associated-type-bounds/union-bounds.rs @@ -0,0 +1,123 @@ +// run-pass + +#![feature(associated_type_bounds)] + +#![allow(unused_assignments)] + +trait Tr1: Copy { type As1: Copy; } +trait Tr2: Copy { type As2: Copy; } +trait Tr3: Copy { type As3: Copy; } +trait Tr4<'a>: Copy { type As4: Copy; } +trait Tr5: Copy { type As5: Copy; } + +impl Tr1 for &str { type As1 = bool; } +impl Tr2 for bool { type As2 = u8; } +impl Tr3 for u8 { type As3 = fn() -> u8; } +impl Tr1 for () { type As1 = (usize,); } +impl<'a> Tr4<'a> for (usize,) { type As4 = u8; } +impl Tr5 for bool { type As5 = u16; } + +union Un1<T: Tr1<As1: Tr2>> { + outest: T, + outer: T::As1, + inner: <T::As1 as Tr2>::As2, +} + +union Un2<T: Tr1<As1: Tr2<As2: Tr3>>> { + outest: T, + outer: T::As1, + inner: <T::As1 as Tr2>::As2, +} + +union Un3<T: Tr1<As1: 'static>> { + outest: T, + outer: &'static T::As1, +} + +union Un4<'x1, 'x2, T: Tr1<As1: for<'l> Tr4<'l>>> { + f1: &'x1 <T::As1 as Tr4<'x1>>::As4, + f2: &'x2 <T::As1 as Tr4<'x2>>::As4, +} + +union _Un5<'x1, 'x2, T: Tr1<As1: for<'l> Tr4<'l, As4: Copy>>> { + f1: &'x1 <T::As1 as Tr4<'x1>>::As4, + f2: &'x2 <T::As1 as Tr4<'x2>>::As4, +} + +union Un6<T> +where + T: Tr1<As1: Tr2 + 'static + Tr5>, +{ + f0: T, + f1: <T::As1 as Tr2>::As2, + f2: &'static T::As1, + f3: <T::As1 as Tr5>::As5, +} + +union _Un7<'a, 'b, T> // `<T::As1 as Tr2>::As2: 'a` is implied. +where + T: Tr1<As1: Tr2>, +{ + f0: &'a T, + f1: &'b <T::As1 as Tr2>::As2, +} + +unsafe fn _use_un7<'a, 'b, T>(x: _Un7<'a, 'b, T>) +where + T: Tr1, + T::As1: Tr2, +{ + let _: &'a T = &x.f0; +} + +#[derive(Copy, Clone)] +union UnSelf<T> where Self: Tr1<As1: Tr2>, T: Copy { + f0: T, + f1: <Self as Tr1>::As1, + f2: <<Self as Tr1>::As1 as Tr2>::As2, +} + +impl Tr1 for UnSelf<&'static str> { type As1 = bool; } + +fn main() { + let mut un1 = Un1 { outest: "foo" }; + un1 = Un1 { outer: true }; + assert_eq!(unsafe { un1.outer }, true); + un1 = Un1 { inner: 42u8 }; + assert_eq!(unsafe { un1.inner }, 42u8); + + let mut un2 = Un2 { outest: "bar" }; + assert_eq!(unsafe { un2.outest }, "bar"); + un2 = Un2 { outer: true }; + assert_eq!(unsafe { un2.outer }, true); + un2 = Un2 { inner: 42u8 }; + assert_eq!(unsafe { un2.inner }, 42u8); + + let mut un3 = Un3 { outest: "baz" }; + assert_eq!(unsafe { un3.outest }, "baz"); + un3 = Un3 { outer: &true }; + assert_eq!(unsafe { *un3.outer }, true); + + let f1 = (1,); + let f2 = (2,); + let mut un4 = Un4::<()> { f1: &f1.0 }; + assert_eq!(1, unsafe { *un4.f1 }); + un4 = Un4 { f2: &f2.0 }; + assert_eq!(2, unsafe { *un4.f2 }); + + let mut un6 = Un6 { f0: "bar" }; + assert_eq!(unsafe { un6.f0 }, "bar"); + un6 = Un6 { f1: 24u8 }; + assert_eq!(unsafe { un6.f1 }, 24u8); + un6 = Un6 { f2: &true }; + assert_eq!(unsafe { un6.f2 }, &true); + un6 = Un6 { f3: 12u16 }; + assert_eq!(unsafe { un6.f3 }, 12u16); + + let mut unself = UnSelf::<_> { f0: "selfish" }; + assert_eq!(unsafe { unself.f0 }, "selfish"); + unself = UnSelf { f1: true }; + assert_eq!(unsafe { unself.f1 }, true); + unself = UnSelf { f2: 24u8 }; + assert_eq!(unsafe { unself.f2 }, 24u8); +} |