diff options
Diffstat (limited to 'tests/ui/issues/issue-22992.rs')
| -rw-r--r-- | tests/ui/issues/issue-22992.rs | 75 |
1 files changed, 75 insertions, 0 deletions
diff --git a/tests/ui/issues/issue-22992.rs b/tests/ui/issues/issue-22992.rs new file mode 100644 index 00000000000..292a0ae298d --- /dev/null +++ b/tests/ui/issues/issue-22992.rs @@ -0,0 +1,75 @@ +// run-pass + +struct X { val: i32 } +impl std::ops::Deref for X { + type Target = i32; + fn deref(&self) -> &i32 { &self.val } +} + + +trait M { fn m(self); } +impl M for i32 { fn m(self) { println!("i32::m()"); } } +impl M for X { fn m(self) { println!("X::m()"); } } +impl<'a> M for &'a X { fn m(self) { println!("&X::m()"); } } +impl<'a, 'b> M for &'a &'b X { fn m(self) { println!("&&X::m()"); } } +impl<'a, 'b, 'c> M for &'a &'b &'c X { fn m(self) { println!("&&&X::m()"); } } + +trait RefM { fn refm(&self); } +impl RefM for i32 { fn refm(&self) { println!("i32::refm()"); } } +impl RefM for X { fn refm(&self) { println!("X::refm()"); } } +impl<'a> RefM for &'a X { fn refm(&self) { println!("&X::refm()"); } } +impl<'a, 'b> RefM for &'a &'b X { fn refm(&self) { println!("&&X::refm()"); } } +impl<'a, 'b, 'c> RefM for &'a &'b &'c X { fn refm(&self) { println!("&&&X::refm()"); } } + +struct Y { val: i32 } +impl std::ops::Deref for Y { + type Target = i32; + fn deref(&self) -> &i32 { &self.val } +} + +struct Z { val: Y } +impl std::ops::Deref for Z { + type Target = Y; + fn deref(&self) -> &Y { &self.val } +} + +struct A; +impl std::marker::Copy for A {} +impl Clone for A { fn clone(&self) -> Self { *self } } +impl M for A { fn m(self) { println!("A::m()"); } } +impl<'a, 'b, 'c> M for &'a &'b &'c A { fn m(self) { println!("&&&A::m()"); } } +impl RefM for A { fn refm(&self) { println!("A::refm()"); } } +impl<'a, 'b, 'c> RefM for &'a &'b &'c A { fn refm(&self) { println!("&&&A::refm()"); } } + +fn main() { + // I'll use @ to denote left side of the dot operator + (*X{val:42}).m(); // i32::refm() , self == @ + X{val:42}.m(); // X::m() , self == @ + (&X{val:42}).m(); // &X::m() , self == @ + (&&X{val:42}).m(); // &&X::m() , self == @ + (&&&X{val:42}).m(); // &&&X:m() , self == @ + (&&&&X{val:42}).m(); // &&&X::m() , self == *@ + (&&&&&X{val:42}).m(); // &&&X::m() , self == **@ + + (*X{val:42}).refm(); // i32::refm() , self == @ + X{val:42}.refm(); // X::refm() , self == @ + (&X{val:42}).refm(); // X::refm() , self == *@ + (&&X{val:42}).refm(); // &X::refm() , self == *@ + (&&&X{val:42}).refm(); // &&X::refm() , self == *@ + (&&&&X{val:42}).refm(); // &&&X::refm(), self == *@ + (&&&&&X{val:42}).refm(); // &&&X::refm(), self == **@ + + Y{val:42}.refm(); // i32::refm() , self == *@ + Z{val:Y{val:42}}.refm(); // i32::refm() , self == **@ + + A.m(); // A::m() , self == @ + // without the Copy trait, (&A).m() would be a compilation error: + // cannot move out of borrowed content + (&A).m(); // A::m() , self == *@ + (&&A).m(); // &&&A::m() , self == &@ + (&&&A).m(); // &&&A::m() , self == @ + A.refm(); // A::refm() , self == @ + (&A).refm(); // A::refm() , self == *@ + (&&A).refm(); // A::refm() , self == **@ + (&&&A).refm(); // &&&A::refm(), self == @ +} |