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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:19:13 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:19:13 +0000 |
commit | 218caa410aa38c29984be31a5229b9fa717560ee (patch) | |
tree | c54bd55eeb6e4c508940a30e94c0032fbd45d677 /tests/ui/specialization/defaultimpl/specialization-no-default.rs | |
parent | Releasing progress-linux version 1.67.1+dfsg1-1~progress7.99u1. (diff) | |
download | rustc-218caa410aa38c29984be31a5229b9fa717560ee.tar.xz rustc-218caa410aa38c29984be31a5229b9fa717560ee.zip |
Merging upstream version 1.68.2+dfsg1.
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'tests/ui/specialization/defaultimpl/specialization-no-default.rs')
-rw-r--r-- | tests/ui/specialization/defaultimpl/specialization-no-default.rs | 77 |
1 files changed, 77 insertions, 0 deletions
diff --git a/tests/ui/specialization/defaultimpl/specialization-no-default.rs b/tests/ui/specialization/defaultimpl/specialization-no-default.rs new file mode 100644 index 000000000..661724eef --- /dev/null +++ b/tests/ui/specialization/defaultimpl/specialization-no-default.rs @@ -0,0 +1,77 @@ +#![feature(specialization)] //~ WARN the feature `specialization` is incomplete + +// Check a number of scenarios in which one impl tries to override another, +// without correctly using `default`. + +// Test 1: one layer of specialization, multiple methods, missing `default` + +trait Foo { + fn foo(&self); + fn bar(&self); +} + +impl<T> Foo for T { + fn foo(&self) {} + fn bar(&self) {} +} + +impl Foo for u8 {} +impl Foo for u16 { + fn foo(&self) {} //~ ERROR E0520 +} +impl Foo for u32 { + fn bar(&self) {} //~ ERROR E0520 +} + +// Test 2: one layer of specialization, missing `default` on associated type + +trait Bar { + type T; +} + +impl<T> Bar for T { + type T = u8; +} + +impl Bar for u8 { + type T = (); //~ ERROR E0520 +} + +// Test 3a: multiple layers of specialization, missing interior `default` + +trait Baz { + fn baz(&self); +} + +default impl<T> Baz for T { + fn baz(&self) {} +} + +impl<T: Clone> Baz for T { + fn baz(&self) {} +} + +impl Baz for i32 { + fn baz(&self) {} //~ ERROR E0520 +} + +// Test 3b: multiple layers of specialization, missing interior `default`, +// redundant `default` in bottom layer. + +trait Redundant { + fn redundant(&self); +} + +default impl<T> Redundant for T { + fn redundant(&self) {} +} + +impl<T: Clone> Redundant for T { + fn redundant(&self) {} +} + +default impl Redundant for i32 { + fn redundant(&self) {} //~ ERROR E0520 +} + +fn main() {} |