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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:02:58 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:02:58 +0000 |
commit | 698f8c2f01ea549d77d7dc3338a12e04c11057b9 (patch) | |
tree | 173a775858bd501c378080a10dca74132f05bc50 /src/test/ui/rfcs/rfc-2528-type-changing-struct-update/type-generic-update.rs | |
parent | Initial commit. (diff) | |
download | rustc-698f8c2f01ea549d77d7dc3338a12e04c11057b9.tar.xz rustc-698f8c2f01ea549d77d7dc3338a12e04c11057b9.zip |
Adding upstream version 1.64.0+dfsg1.upstream/1.64.0+dfsg1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/test/ui/rfcs/rfc-2528-type-changing-struct-update/type-generic-update.rs')
-rw-r--r-- | src/test/ui/rfcs/rfc-2528-type-changing-struct-update/type-generic-update.rs | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/src/test/ui/rfcs/rfc-2528-type-changing-struct-update/type-generic-update.rs b/src/test/ui/rfcs/rfc-2528-type-changing-struct-update/type-generic-update.rs new file mode 100644 index 000000000..dae1241d3 --- /dev/null +++ b/src/test/ui/rfcs/rfc-2528-type-changing-struct-update/type-generic-update.rs @@ -0,0 +1,56 @@ +#![feature(type_changing_struct_update)] +#![allow(incomplete_features)] + +struct Machine<'a, S, M> { + state: S, + message: M, + lt_str: &'a str, + common_field: i32, +} + +struct State1; +struct State2; + +struct Message1; +struct Message2; + +fn update() { + let m1: Machine<State1, Message1> = Machine { + state: State1, + message: Message1, + lt_str: "hello", + common_field: 2, + }; + // single type update + let m2: Machine<State2, Message1> = Machine { + state: State2, + ..m1 + }; + // multiple type update + let m3: Machine<State2, Message2> = Machine { + state: State2, + message: Message2, + ..m1 + }; +} + +fn fail_update() { + let m1: Machine<f64, f64> = Machine { + state: 3.2, + message: 6.4, + lt_str: "hello", + common_field: 2, + }; + // single type update fail + let m2: Machine<i32, f64> = Machine { + ..m1 + //~^ ERROR mismatched types [E0308] + }; + // multiple type update fail + let m3 = Machine::<i32, i32> { + ..m1 + //~^ ERROR mismatched types [E0308] + }; +} + +fn main() {} |