Test move-into-Fn/FnMut errors too

Author: ashtneoi

src/test/ui/suggestions/dont-suggest-ref-in-closure.rs

@@ -0,0 +1,171 @@
+// Copyright 2018 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+#![feature(nll)]
+
+#[derive(Clone)]
+enum Either {
+    One(X),
+    Two(X),
+}
+
+#[derive(Clone)]
+struct X(Y);
+
+#[derive(Clone)]
+struct Y;
+
+fn consume_fn<F: Fn()>(_f: F) { }
+
+fn consume_fnmut<F: FnMut()>(_f: F) { }
+
+pub fn main() { }
+
+fn move_into_fn() {
+    let e = Either::One(X(Y));
+    let mut em = Either::One(X(Y));
+
+    let x = X(Y);
+
+    // -------- move into Fn --------
+
+    consume_fn(|| {
+        let X(_t) = x;
+        //~^ ERROR cannot move
+        //~| HELP consider borrowing here
+        //~| SUGGESTION &x
+        if let Either::One(_t) = e { }
+        //~^ ERROR cannot move
+        //~| HELP consider borrowing here
+        //~| SUGGESTION &e
+        while let Either::One(_t) = e { }
+        //~^ ERROR cannot move
+        //~| HELP consider borrowing here
+        //~| SUGGESTION &e
+        match e {
+            //~^ ERROR cannot move
+            //~| HELP consider borrowing here
+            //~| SUGGESTION &e
+            Either::One(_t)
+            | Either::Two(_t) => (),
+        }
+        match e {
+            //~^ ERROR cannot move
+            //~| HELP consider borrowing here
+            //~| SUGGESTION &e
+            Either::One(_t) => (),
+            Either::Two(ref _t) => (),
+            // FIXME: should suggest removing `ref` too
+        }
+
+        let X(mut _t) = x;
+        //~^ ERROR cannot move
+        //~| HELP consider borrowing here
+        //~| SUGGESTION &x
+        if let Either::One(mut _t) = em { }
+        //~^ ERROR cannot move
+        //~| HELP consider borrowing here
+        //~| SUGGESTION &em
+        while let Either::One(mut _t) = em { }
+        //~^ ERROR cannot move
+        //~| HELP consider borrowing here
+        //~| SUGGESTION &em
+        match em {
+            //~^ ERROR cannot move
+            //~| HELP consider borrowing here
+            //~| SUGGESTION &em
+            Either::One(mut _t)
+            | Either::Two(mut _t) => (),
+        }
+        match em {
+            //~^ ERROR cannot move
+            //~| HELP consider borrowing here
+            //~| SUGGESTION &em
+            Either::One(mut _t) => (),
+            Either::Two(ref _t) => (),
+            // FIXME: should suggest removing `ref` too
+        }
+    });
+}
+
+fn move_into_fnmut() {
+    let e = Either::One(X(Y));
+    let mut em = Either::One(X(Y));
+
+    let x = X(Y);
+
+    // -------- move into FnMut --------
+
+    consume_fnmut(|| {
+        let X(_t) = x;
+        //~^ ERROR cannot move
+        //~| HELP consider borrowing here
+        //~| SUGGESTION &x
+        if let Either::One(_t) = e { }
+        //~^ ERROR cannot move
+        //~| HELP consider borrowing here
+        //~| SUGGESTION &e
+        while let Either::One(_t) = e { }
+        //~^ ERROR cannot move
+        //~| HELP consider borrowing here
+        //~| SUGGESTION &e
+        match e {
+            //~^ ERROR cannot move
+            //~| HELP consider borrowing here
+            //~| SUGGESTION &e
+            Either::One(_t)
+            | Either::Two(_t) => (),
+        }
+        match e {
+            //~^ ERROR cannot move
+            //~| HELP consider borrowing here
+            //~| SUGGESTION &e
+            Either::One(_t) => (),
+            Either::Two(ref _t) => (),
+            // FIXME: should suggest removing `ref` too
+        }
+
+        let X(mut _t) = x;
+        //~^ ERROR cannot move
+        //~| HELP consider borrowing here
+        //~| SUGGESTION &x
+        if let Either::One(mut _t) = em { }
+        //~^ ERROR cannot move
+        //~| HELP consider borrowing here
+        //~| SUGGESTION &em
+        while let Either::One(mut _t) = em { }
+        //~^ ERROR cannot move
+        //~| HELP consider borrowing here
+        //~| SUGGESTION &em
+        match em {
+            //~^ ERROR cannot move
+            //~| HELP consider borrowing here
+            //~| SUGGESTION &em
+            Either::One(mut _t)
+            | Either::Two(mut _t) => (),
+        }
+        match em {
+            //~^ ERROR cannot move
+            //~| HELP consider borrowing here
+            //~| SUGGESTION &em
+            Either::One(mut _t) => (),
+            Either::Two(ref _t) => (),
+            // FIXME: should suggest removing `ref` too
+        }
+        match em {
+            //~^ ERROR cannot move
+            //~| HELP consider borrowing here
+            //~| SUGGESTION &em
+            Either::One(mut _t) => (),
+            Either::Two(ref mut _t) => (),
+            // FIXME: should suggest removing `ref` too
+        }
+    });
+}