Auto merge of #54757 - nikomatsakis:nll-issue-54573-user-annot, r=pnkfelix

user annotations in patterns

Fixes https://github.com/rust-lang/rust/issues/54573

r? @pnkfelix

src/test/ui/nll/user-annotations/pattern_substs_on_brace_enum_variant.rs

@@ -0,0 +1,24 @@
+#![feature(nll)]
+
+enum Foo<'a> {
+    Bar { field: &'a u32 }
+}
+
+fn in_let() {
+    let y = 22;
+    let foo = Foo::Bar { field: &y };
+    //~^ ERROR `y` does not live long enough
+    let Foo::Bar::<'static> { field: _z } = foo;
+}
+
+fn in_match() {
+    let y = 22;
+    let foo = Foo::Bar { field: &y };
+    //~^ ERROR `y` does not live long enough
+    match foo {
+        Foo::Bar::<'static> { field: _z } => {
+        }
+    }
+}
+
+fn main() { }

src/test/ui/nll/user-annotations/pattern_substs_on_brace_enum_variant.stderr

@@ -0,0 +1,25 @@
+error[E0597]: `y` does not live long enough
+  --> $DIR/pattern_substs_on_brace_enum_variant.rs:9:33
+   |
+LL |     let foo = Foo::Bar { field: &y };
+   |                                 ^^ borrowed value does not live long enough
+...
+LL | }
+   | - `y` dropped here while still borrowed
+   |
+   = note: borrowed value must be valid for the static lifetime...
+
+error[E0597]: `y` does not live long enough
+  --> $DIR/pattern_substs_on_brace_enum_variant.rs:16:33
+   |
+LL |     let foo = Foo::Bar { field: &y };
+   |                                 ^^ borrowed value does not live long enough
+...
+LL | }
+   | - `y` dropped here while still borrowed
+   |
+   = note: borrowed value must be valid for the static lifetime...
+
+error: aborting due to 2 previous errors
+
+For more information about this error, try `rustc --explain E0597`.

src/test/ui/nll/user-annotations/pattern_substs_on_brace_struct.rs

@@ -0,0 +1,22 @@
+#![feature(nll)]
+
+struct Foo<'a> { field: &'a u32 }
+
+fn in_let() {
+    let y = 22;
+    let foo = Foo { field: &y };
+    //~^ ERROR `y` does not live long enough
+    let Foo::<'static> { field: _z } = foo;
+}
+
+fn in_main() {
+    let y = 22;
+    let foo = Foo { field: &y };
+    //~^ ERROR `y` does not live long enough
+    match foo {
+        Foo::<'static> { field: _z } => {
+        }
+    }
+}
+
+fn main() { }

src/test/ui/nll/user-annotations/pattern_substs_on_brace_struct.stderr

@@ -0,0 +1,25 @@
+error[E0597]: `y` does not live long enough
+  --> $DIR/pattern_substs_on_brace_struct.rs:7:28
+   |
+LL |     let foo = Foo { field: &y };
+   |                            ^^ borrowed value does not live long enough
+...
+LL | }
+   | - `y` dropped here while still borrowed
+   |
+   = note: borrowed value must be valid for the static lifetime...
+
+error[E0597]: `y` does not live long enough
+  --> $DIR/pattern_substs_on_brace_struct.rs:14:28
+   |
+LL |     let foo = Foo { field: &y };
+   |                            ^^ borrowed value does not live long enough
+...
+LL | }
+   | - `y` dropped here while still borrowed
+   |
+   = note: borrowed value must be valid for the static lifetime...
+
+error: aborting due to 2 previous errors
+
+For more information about this error, try `rustc --explain E0597`.

src/test/ui/nll/user-annotations/pattern_substs_on_tuple_enum_variant.rs

@@ -0,0 +1,24 @@
+#![feature(nll)]
+
+enum Foo<'a> {
+    Bar(&'a u32)
+}
+
+fn in_let() {
+    let y = 22;
+    let foo = Foo::Bar(&y);
+    //~^ ERROR `y` does not live long enough
+    let Foo::Bar::<'static>(_z) = foo;
+}
+
+fn in_match() {
+    let y = 22;
+    let foo = Foo::Bar(&y);
+    //~^ ERROR `y` does not live long enough
+    match foo {
+        Foo::Bar::<'static>(_z) => {
+        }
+    }
+}
+
+fn main() { }

src/test/ui/nll/user-annotations/pattern_substs_on_tuple_enum_variant.stderr

@@ -0,0 +1,25 @@
+error[E0597]: `y` does not live long enough
+  --> $DIR/pattern_substs_on_tuple_enum_variant.rs:9:24
+   |
+LL |     let foo = Foo::Bar(&y);
+   |                        ^^ borrowed value does not live long enough
+...
+LL | }
+   | - `y` dropped here while still borrowed
+   |
+   = note: borrowed value must be valid for the static lifetime...
+
+error[E0597]: `y` does not live long enough
+  --> $DIR/pattern_substs_on_tuple_enum_variant.rs:16:24
+   |
+LL |     let foo = Foo::Bar(&y);
+   |                        ^^ borrowed value does not live long enough
+...
+LL | }
+   | - `y` dropped here while still borrowed
+   |
+   = note: borrowed value must be valid for the static lifetime...
+
+error: aborting due to 2 previous errors
+
+For more information about this error, try `rustc --explain E0597`.

src/test/ui/nll/user-annotations/pattern_substs_on_tuple_struct.rs

@@ -0,0 +1,22 @@
+#![feature(nll)]
+
+struct Foo<'a>(&'a u32);
+
+fn in_let() {
+    let y = 22;
+    let foo = Foo(&y);
+    //~^ ERROR `y` does not live long enough
+    let Foo::<'static>(_z) = foo;
+}
+
+fn in_match() {
+    let y = 22;
+    let foo = Foo(&y);
+    //~^ ERROR `y` does not live long enough
+    match foo {
+        Foo::<'static>(_z) => {
+        }
+    }
+}
+
+fn main() { }

src/test/ui/nll/user-annotations/pattern_substs_on_tuple_struct.stderr

@@ -0,0 +1,25 @@
+error[E0597]: `y` does not live long enough
+  --> $DIR/pattern_substs_on_tuple_struct.rs:7:19
+   |
+LL |     let foo = Foo(&y);
+   |                   ^^ borrowed value does not live long enough
+...
+LL | }
+   | - `y` dropped here while still borrowed
+   |
+   = note: borrowed value must be valid for the static lifetime...
+
+error[E0597]: `y` does not live long enough
+  --> $DIR/pattern_substs_on_tuple_struct.rs:14:19
+   |
+LL |     let foo = Foo(&y);
+   |                   ^^ borrowed value does not live long enough
+...
+LL | }
+   | - `y` dropped here while still borrowed
+   |
+   = note: borrowed value must be valid for the static lifetime...
+
+error: aborting due to 2 previous errors
+
+For more information about this error, try `rustc --explain E0597`.