Parser: better error messages for `@` in struct patterns

1 files changed, 14 insertions, 0 deletions

diff --git a/tests/ui/pattern/at-in-struct-patterns.rs b/tests/ui/pattern/at-in-struct-patterns.rs
new file mode 100644
index 00000000000..e8fad61f317
--- /dev/null
+++ b/tests/ui/pattern/at-in-struct-patterns.rs
@@ -0,0 +1,14 @@
+struct Foo {
+    field1: u8,
+    field2: u8,
+}
+
+fn main() {
+    let foo = Foo { field1: 1, field2: 2 };
+    let Foo { var @ field1, .. } = foo; //~ ERROR Unexpected `@` in struct pattern
+    dbg!(var); //~ ERROR cannot find value `var` in this scope
+    let Foo { field1: _, bar @ .. } = foo; //~ ERROR `@ ..` is not supported in struct patterns
+    let Foo { bar @ .. } = foo; //~ ERROR `@ ..` is not supported in struct patterns
+    let Foo { @ } = foo; //~ ERROR expected identifier, found `@`
+    let Foo { @ .. } = foo; //~ ERROR expected identifier, found `@`
+}