about summary refs log tree commit diff
path: root/src/test/ui/destructuring-assignment/tuple_struct_destructure.rs
diff options
context:
space:
mode:
authorbors <bors@rust-lang.org>2020-11-12 23:23:56 +0000
committerbors <bors@rust-lang.org>2020-11-12 23:23:56 +0000
commite80ee05bfc135d7d800f3fcc89bc005d6858cd9b (patch)
tree4b8950bc77d07a409c0c444ac07d6816785eede1 /src/test/ui/destructuring-assignment/tuple_struct_destructure.rs
parent9722952f0bed5815cb22cb4878be09fb39f92804 (diff)
parent38ca6e3561dbd2465cd604feeed93cf82580745c (diff)
downloadrust-e80ee05bfc135d7d800f3fcc89bc005d6858cd9b.tar.gz
rust-e80ee05bfc135d7d800f3fcc89bc005d6858cd9b.zip
Auto merge of #78998 - m-ou-se:rollup-6r4pt9m, r=m-ou-se
Rollup of 7 pull requests

Successful merges:

 - #76730 (Fix rustdoc rendering of by-value mutable arguments in async fn)
 - #78836 (Implement destructuring assignment for structs and slices)
 - #78857 (Improve BinaryHeap performance)
 - #78950 (Add asm register information for SPIR-V)
 - #78970 (update rustfmt to v1.4.25)
 - #78972 (Update cargo)
 - #78987 (extend min_const_generics param ty tests)

Failed merges:

r? `@ghost`
`@rustbot` modify labels: rollup
Diffstat (limited to 'src/test/ui/destructuring-assignment/tuple_struct_destructure.rs')
-rw-r--r--src/test/ui/destructuring-assignment/tuple_struct_destructure.rs34
1 files changed, 34 insertions, 0 deletions
diff --git a/src/test/ui/destructuring-assignment/tuple_struct_destructure.rs b/src/test/ui/destructuring-assignment/tuple_struct_destructure.rs
new file mode 100644
index 00000000000..106a9b16db4
--- /dev/null
+++ b/src/test/ui/destructuring-assignment/tuple_struct_destructure.rs
@@ -0,0 +1,34 @@
+// run-pass
+
+#![feature(destructuring_assignment)]
+
+struct TupleStruct<S, T>(S, T);
+
+impl<S, T> TupleStruct<S, T> {
+    fn assign(self, first: &mut S, second: &mut T) {
+        // Test usage of `Self` instead of the struct name:
+        Self(*first, *second) = self
+    }
+}
+
+enum Enum<S, T> {
+    SingleVariant(S, T)
+}
+
+type Alias<S> = Enum<S, isize>;
+
+fn main() {
+    let (mut a, mut b);
+    TupleStruct(a, b) = TupleStruct(0, 1);
+    assert_eq!((a, b), (0, 1));
+    TupleStruct(a, .., b) = TupleStruct(1, 2);
+    assert_eq!((a, b), (1, 2));
+    TupleStruct(..) = TupleStruct(3, 4);
+    assert_eq!((a, b), (1, 2));
+    TupleStruct(5,6).assign(&mut a, &mut b);
+    assert_eq!((a, b), (5, 6));
+    Enum::SingleVariant(a, b) = Enum::SingleVariant(7, 8);
+    assert_eq!((a, b), (7, 8));
+    Alias::SingleVariant(a, b) = Alias::SingleVariant(9, 10);
+    assert_eq!((a, b), (9, 10));
+}