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Auto merge of #78638 - vn-ki:bindigs-after-at-issue-69971, r=oli-obk

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reverse binding order in matches to allow the subbinding of copyable fields in bindings after @

Fixes #69971

### TODO

- [x] Regression tests

r? `@oli-obk`
This commit is contained in:
bors 2020-11-05 13:26:08 +00:00
commit b1d9f31e04
22 changed files with 572 additions and 599 deletions
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44
compiler/rustc_mir_build/src/build/matches/simplify.rs
View File

@ -43,12 +43,36 @@ impl<'a, 'tcx> Builder<'a, 'tcx> {
candidate: &mut Candidate<'pat, 'tcx>,
) -> bool {
// repeatedly simplify match pairs until fixed point is reached
debug!(?candidate, "simplify_candidate");
// existing_bindings and new_bindings exists to keep the semantics in order.
// Reversing the binding order for bindings after `@` changes the binding order in places
// it shouldn't be changed, for example `let (Some(a), Some(b)) = (x, y)`
//
// To avoid this, the binding occurs in the following manner:
// * the bindings for one iteration of the following loop occurs in order (i.e. left to
// right)
// * the bindings from the previous iteration of the loop is prepended to the bindings from
// the current iteration (in the implementation this is done by mem::swap and extend)
// * after all iterations, these new bindings are then appended to the bindings that were
// prexisting (i.e. `candidate.binding` when the function was called).
//
// example:
// candidate.bindings = [1, 2, 3]
// binding in iter 1: [4, 5]
// binding in iter 2: [6, 7]
//
// final binding: [1, 2, 3, 6, 7, 4, 5]
let mut existing_bindings = mem::take(&mut candidate.bindings);
let mut new_bindings = Vec::new();
loop {
let match_pairs = mem::take(&mut candidate.match_pairs);
if let [MatchPair { pattern: Pat { kind: box PatKind::Or { pats }, .. }, place }] =
*match_pairs
{
existing_bindings.extend_from_slice(&new_bindings);
mem::swap(&mut candidate.bindings, &mut existing_bindings);
candidate.subcandidates = self.create_or_subcandidates(candidate, place, pats);
return true;
}
@ -64,13 +88,33 @@ impl<'a, 'tcx> Builder<'a, 'tcx> {
}
}
}
// Avoid issue #69971: the binding order should be right to left if there are more
// bindings after `@` to please the borrow checker
// Ex
// struct NonCopyStruct {
// copy_field: u32,
// }
//
// fn foo1(x: NonCopyStruct) {
// let y @ NonCopyStruct { copy_field: z } = x;
// // the above should turn into
// let z = x.copy_field;
// let y = x;
// }
candidate.bindings.extend_from_slice(&new_bindings);
mem::swap(&mut candidate.bindings, &mut new_bindings);
candidate.bindings.clear();
if !changed {
existing_bindings.extend_from_slice(&new_bindings);
mem::swap(&mut candidate.bindings, &mut existing_bindings);
// Move or-patterns to the end, because they can result in us
// creating additional candidates, so we want to test them as
// late as possible.
candidate
.match_pairs
.sort_by_key(|pair| matches!(*pair.pattern.kind, PatKind::Or { .. }));
debug!(simplified = ?candidate, "simplify_candidate");
return false; // if we were not able to simplify any, done.
}
}

49
src/test/ui/pattern/bindings-after-at/bind-by-copy.rs Normal file
View File

@ -0,0 +1,49 @@
// run-pass
// Test copy
#![feature(bindings_after_at)]
struct A { a: i32, b: i32 }
struct B { a: i32, b: C }
struct D { a: i32, d: C }
#[derive(Copy,Clone)]
struct C { c: i32 }
pub fn main() {
match (A {a: 10, b: 20}) {
x@A {a, b: 20} => { assert!(x.a == 10); assert!(a == 10); }
A {b: _b, ..} => { panic!(); }
}
let mut x@B {b, ..} = B {a: 10, b: C {c: 20}};
assert_eq!(x.a, 10);
x.b.c = 30;
assert_eq!(b.c, 20);
let mut y@D {d, ..} = D {a: 10, d: C {c: 20}};
assert_eq!(y.a, 10);
y.d.c = 30;
assert_eq!(d.c, 20);
let some_b = Some(B { a: 10, b: C { c: 20 } });
// in irrefutable pattern
if let Some(x @ B { b, .. }) = some_b {
assert_eq!(x.b.c, 20);
assert_eq!(b.c, 20);
} else {
unreachable!();
}
let some_b = Some(B { a: 10, b: C { c: 20 } });
if let Some(x @ B { b: mut b @ C { c }, .. }) = some_b {
assert_eq!(x.b.c, 20);
assert_eq!(b.c, 20);
b.c = 30;
assert_eq!(b.c, 30);
assert_eq!(c, 20);
} else {
unreachable!();
}
}

4
src/test/ui/pattern/bindings-after-at/bind-by-move-neither-can-live-while-the-other-survives-1.rs
View File

@ -12,6 +12,7 @@ fn main() {
let x = Some(X { x: () });
match x {
Some(ref _y @ _z) => {} //~ ERROR cannot move out of value because it is borrowed
//~| ERROR borrow of moved value
None => panic!(),
}
@ -19,13 +20,13 @@ fn main() {
match x {
Some(_z @ ref _y) => {}
//~^ ERROR borrow of moved value
//~| ERROR borrow of moved value
None => panic!(),
}
let mut x = Some(X { x: () });
match x {
Some(ref mut _y @ _z) => {} //~ ERROR cannot move out of value because it is borrowed
//~| ERROR borrow of moved value
None => panic!(),
}
@ -33,7 +34,6 @@ fn main() {
match x {
Some(_z @ ref mut _y) => {}
//~^ ERROR borrow of moved value
//~| ERROR borrow of moved value
None => panic!(),
}
}

36
src/test/ui/pattern/bindings-after-at/bind-by-move-neither-can-live-while-the-other-survives-1.stderr
View File

@ -8,7 +8,7 @@ LL | Some(ref _y @ _z) => {}
| value borrowed, by `_y`, here
error: borrow of moved value
--> $DIR/bind-by-move-neither-can-live-while-the-other-survives-1.rs:20:14
--> $DIR/bind-by-move-neither-can-live-while-the-other-survives-1.rs:21:14
|
LL | Some(_z @ ref _y) => {}
| --^^^------
@ -27,7 +27,7 @@ LL | Some(ref mut _y @ _z) => {}
| value borrowed, by `_y`, here
error: borrow of moved value
--> $DIR/bind-by-move-neither-can-live-while-the-other-survives-1.rs:34:14
--> $DIR/bind-by-move-neither-can-live-while-the-other-survives-1.rs:35:14
|
LL | Some(_z @ ref mut _y) => {}
| --^^^----------
@ -37,34 +37,34 @@ LL | Some(_z @ ref mut _y) => {}
| move occurs because `_z` has type `X` which does not implement the `Copy` trait
error[E0382]: borrow of moved value
--> $DIR/bind-by-move-neither-can-live-while-the-other-survives-1.rs:20:19
--> $DIR/bind-by-move-neither-can-live-while-the-other-survives-1.rs:14:14
|
LL | Some(_z @ ref _y) => {}
| -----^^^^^^
| | |
| | value borrowed here after move
| value moved here
LL | Some(ref _y @ _z) => {}
| ^^^^^^^^^--
| | |
| | value moved here
| value borrowed here after move
|
= note: move occurs because value has type `X`, which does not implement the `Copy` trait
help: borrow this field in the pattern to avoid moving `x.0`
|
LL | Some(ref _z @ ref _y) => {}
| ^^^
LL | Some(ref _y @ ref _z) => {}
| ^^^
error[E0382]: borrow of moved value
--> $DIR/bind-by-move-neither-can-live-while-the-other-survives-1.rs:34:19
--> $DIR/bind-by-move-neither-can-live-while-the-other-survives-1.rs:28:14
|
LL | Some(_z @ ref mut _y) => {}
| -----^^^^^^^^^^
| | |
| | value borrowed here after move
| value moved here
LL | Some(ref mut _y @ _z) => {}
| ^^^^^^^^^^^^^--
| | |
| | value moved here
| value borrowed here after move
|
= note: move occurs because value has type `X`, which does not implement the `Copy` trait
help: borrow this field in the pattern to avoid moving `x.0`
|
LL | Some(ref _z @ ref mut _y) => {}
| ^^^
LL | Some(ref mut _y @ ref _z) => {}
| ^^^
error: aborting due to 6 previous errors

2
src/test/ui/pattern/bindings-after-at/bind-by-move-no-subbindings-fun-param.rs
View File

@ -7,7 +7,7 @@ fn main() {}
struct A(Box<u8>);
fn f(a @ A(u): A) -> Box<u8> {
//~^ ERROR use of moved value
//~^ ERROR use of partially moved value
drop(a);
u
}

13
src/test/ui/pattern/bindings-after-at/bind-by-move-no-subbindings-fun-param.stderr
View File

@ -1,12 +1,13 @@
error[E0382]: use of moved value
--> $DIR/bind-by-move-no-subbindings-fun-param.rs:9:12
error[E0382]: use of partially moved value
--> $DIR/bind-by-move-no-subbindings-fun-param.rs:9:6
|
LL | fn f(a @ A(u): A) -> Box<u8> {
| ------^-
| ^^^^^^-^
| | |
| | value used here after move
| value moved here
| move occurs because value has type `A`, which does not implement the `Copy` trait
| | value partially moved here
| value used here after partial move
|
= note: partial move occurs because value has type `Box<u8>`, which does not implement the `Copy` trait
error: aborting due to previous error

8
src/test/ui/pattern/bindings-after-at/borrowck-move-and-move.rs
View File

@ -12,9 +12,9 @@ fn main() {
let a @ b = U; //~ ERROR use of moved value
let a @ (b, c) = (U, U); //~ ERROR use of moved value
let a @ (b, c) = (U, U); //~ ERROR use of partially moved value
let a @ (b, c) = (u(), u()); //~ ERROR use of moved value
let a @ (b, c) = (u(), u()); //~ ERROR use of partially moved value
match Ok(U) {
a @ Ok(b) | a @ Err(b) => {} //~ ERROR use of moved value
@ -24,10 +24,10 @@ fn main() {
fn fun(a @ b: U) {} //~ ERROR use of moved value
match [u(), u(), u(), u()] {
xs @ [a, .., b] => {} //~ ERROR use of moved value
xs @ [a, .., b] => {} //~ ERROR use of partially moved value
}
match [u(), u(), u(), u()] {
xs @ [_, ys @ .., _] => {} //~ ERROR use of moved value
xs @ [_, ys @ .., _] => {} //~ ERROR use of partially moved value
}
}

70
src/test/ui/pattern/bindings-after-at/borrowck-move-and-move.stderr
View File

@ -1,29 +1,33 @@
error[E0382]: use of moved value
--> $DIR/borrowck-move-and-move.rs:13:13
--> $DIR/borrowck-move-and-move.rs:13:9
|
LL | let a @ b = U;
| ----^ - move occurs because value has type `U`, which does not implement the `Copy` trait
| ^^^^- - move occurs because value has type `U`, which does not implement the `Copy` trait
| | |
| | value used here after move
| value moved here
| | value moved here
| value used here after move
error[E0382]: use of moved value
--> $DIR/borrowck-move-and-move.rs:15:17
error[E0382]: use of partially moved value
--> $DIR/borrowck-move-and-move.rs:15:9
|
LL | let a @ (b, c) = (U, U);
| --------^- ------ move occurs because value has type `(U, U)`, which does not implement the `Copy` trait
| ^^^^^^^^-^
| | |
| | value used here after move
| value moved here
| | value partially moved here
| value used here after partial move
|
= note: partial move occurs because value has type `U`, which does not implement the `Copy` trait
error[E0382]: use of moved value
--> $DIR/borrowck-move-and-move.rs:17:17
error[E0382]: use of partially moved value
--> $DIR/borrowck-move-and-move.rs:17:9
|
LL | let a @ (b, c) = (u(), u());
| --------^- ---------- move occurs because value has type `(U, U)`, which does not implement the `Copy` trait
| ^^^^^^^^-^
| | |
| | value used here after move
| value moved here
| | value partially moved here
| value used here after partial move
|
= note: partial move occurs because value has type `U`, which does not implement the `Copy` trait
error[E0382]: use of moved value
--> $DIR/borrowck-move-and-move.rs:20:16
@ -47,36 +51,36 @@ LL | a @ Ok(b) | a @ Err(b) => {}
| | value used here after move
| value moved here
error[E0382]: use of moved value
--> $DIR/borrowck-move-and-move.rs:27:22
error[E0382]: use of partially moved value
--> $DIR/borrowck-move-and-move.rs:27:9
|
LL | match [u(), u(), u(), u()] {
| -------------------- move occurs because value has type `[U; 4]`, which does not implement the `Copy` trait
LL | xs @ [a, .., b] => {}
| -------------^-
| ^^^^^^^^^^^^^-^
| | |
| | value used here after move
| value moved here
error[E0382]: use of moved value
--> $DIR/borrowck-move-and-move.rs:31:18
| | value partially moved here
| value used here after partial move
|
= note: partial move occurs because value has type `U`, which does not implement the `Copy` trait
error[E0382]: use of partially moved value
--> $DIR/borrowck-move-and-move.rs:31:9
|
LL | match [u(), u(), u(), u()] {
| -------------------- move occurs because value has type `[U; 4]`, which does not implement the `Copy` trait
LL | xs @ [_, ys @ .., _] => {}
| ---------^^^^^^^----
| ^^^^^^^^^-------^^^^
| | |
| | value used here after move
| value moved here
| | value partially moved here
| value used here after partial move
|
= note: partial move occurs because value has type `U`, which does not implement the `Copy` trait
error[E0382]: use of moved value
--> $DIR/borrowck-move-and-move.rs:24:16
--> $DIR/borrowck-move-and-move.rs:24:12
|
LL | fn fun(a @ b: U) {}
| ----^
| ^^^^-
| | |
| | value used here after move
| value moved here
| | value moved here
| value used here after move
| move occurs because value has type `U`, which does not implement the `Copy` trait
error: aborting due to 8 previous errors

16
src/test/ui/pattern/bindings-after-at/borrowck-pat-at-and-box.rs
View File

@ -18,22 +18,19 @@ fn nc() -> NC {
fn main() {
let a @ box &b = Box::new(&C);
//~^ ERROR use of moved value
let a @ box b = Box::new(C);
//~^ ERROR use of moved value
fn f1(a @ box &b: Box<&C>) {}
//~^ ERROR use of moved value
fn f2(a @ box b: Box<C>) {}
//~^ ERROR use of moved value
match Box::new(C) {
a @ box b => {} //~ ERROR use of moved value
a @ box b => {}
}
let ref a @ box b = Box::new(NC); //~ ERROR cannot move out of value because it is borrowed
//~| ERROR borrow of moved value
let ref a @ box ref mut b = Box::new(nc());
//~^ ERROR cannot borrow value as mutable because it is also borrowed as immutable
@ -41,22 +38,23 @@ fn main() {
//~^ ERROR cannot borrow value as mutable because it is also borrowed as immutable
let ref a @ box ref mut b = Box::new(NC);
//~^ ERROR cannot borrow value as mutable because it is also borrowed as immutable
//~| ERROR cannot borrow value as immutable because it is also borrowed as mutable
*b = NC;
let ref a @ box ref mut b = Box::new(NC);
//~^ ERROR cannot borrow value as mutable because it is also borrowed as immutable
//~| ERROR cannot borrow value as mutable because it is also borrowed as immutable
//~| ERROR cannot borrow value as immutable because it is also borrowed as mutable
*b = NC;
drop(a);
let ref mut a @ box ref b = Box::new(NC);
//~^ ERROR cannot borrow value as immutable because it is also borrowed as mutable
//~| ERROR cannot borrow value as immutable because it is also borrowed as mutable
//~| ERROR cannot borrow value as mutable because it is also borrowed as immutable
*a = Box::new(NC);
drop(b);
fn f5(ref mut a @ box ref b: Box<NC>) {
//~^ ERROR cannot borrow value as immutable because it is also borrowed as mutable
//~| ERROR cannot borrow value as immutable because it is also borrowed as mutable
//~| ERROR cannot borrow value as mutable because it is also borrowed as immutable
*a = Box::new(NC);
drop(b);
}
@ -64,7 +62,7 @@ fn main() {
match Box::new(nc()) {
ref mut a @ box ref b => {
//~^ ERROR cannot borrow value as immutable because it is also borrowed as mutable
//~| ERROR cannot borrow value as immutable because it is also borrowed as mutable
//~| ERROR cannot borrow value as mutable because it is also borrowed as immutable
*a = Box::new(NC);
drop(b);
}

122
src/test/ui/pattern/bindings-after-at/borrowck-pat-at-and-box.stderr
View File

@ -1,5 +1,5 @@
error: cannot move out of value because it is borrowed
--> $DIR/borrowck-pat-at-and-box.rs:36:9
--> $DIR/borrowck-pat-at-and-box.rs:32:9
|
LL | let ref a @ box b = Box::new(NC);
| -----^^^^^^^-
@ -8,7 +8,7 @@ LL | let ref a @ box b = Box::new(NC);
| value borrowed, by `a`, here
error: cannot borrow value as mutable because it is also borrowed as immutable
--> $DIR/borrowck-pat-at-and-box.rs:38:9
--> $DIR/borrowck-pat-at-and-box.rs:35:9
|
LL | let ref a @ box ref mut b = Box::new(nc());
| -----^^^^^^^---------
@ -17,7 +17,7 @@ LL | let ref a @ box ref mut b = Box::new(nc());
| immutable borrow, by `a`, occurs here
error: cannot borrow value as mutable because it is also borrowed as immutable
--> $DIR/borrowck-pat-at-and-box.rs:40:9
--> $DIR/borrowck-pat-at-and-box.rs:37:9
|
LL | let ref a @ box ref mut b = Box::new(NC);
| -----^^^^^^^---------
@ -26,7 +26,7 @@ LL | let ref a @ box ref mut b = Box::new(NC);
| immutable borrow, by `a`, occurs here
error: cannot borrow value as mutable because it is also borrowed as immutable
--> $DIR/borrowck-pat-at-and-box.rs:42:9
--> $DIR/borrowck-pat-at-and-box.rs:39:9
|
LL | let ref a @ box ref mut b = Box::new(NC);
| -----^^^^^^^---------
@ -35,7 +35,7 @@ LL | let ref a @ box ref mut b = Box::new(NC);
| immutable borrow, by `a`, occurs here
error: cannot borrow value as mutable because it is also borrowed as immutable
--> $DIR/borrowck-pat-at-and-box.rs:45:9
--> $DIR/borrowck-pat-at-and-box.rs:43:9
|
LL | let ref a @ box ref mut b = Box::new(NC);
| -----^^^^^^^---------
@ -44,7 +44,7 @@ LL | let ref a @ box ref mut b = Box::new(NC);
| immutable borrow, by `a`, occurs here
error: cannot borrow value as immutable because it is also borrowed as mutable
--> $DIR/borrowck-pat-at-and-box.rs:51:9
--> $DIR/borrowck-pat-at-and-box.rs:49:9
|
LL | let ref mut a @ box ref b = Box::new(NC);
| ---------^^^^^^^-----
@ -53,7 +53,7 @@ LL | let ref mut a @ box ref b = Box::new(NC);
| mutable borrow, by `a`, occurs here
error: cannot borrow value as immutable because it is also borrowed as mutable
--> $DIR/borrowck-pat-at-and-box.rs:65:9
--> $DIR/borrowck-pat-at-and-box.rs:63:9
|
LL | ref mut a @ box ref b => {
| ---------^^^^^^^-----
@ -62,7 +62,7 @@ LL | ref mut a @ box ref b => {
| mutable borrow, by `a`, occurs here
error: cannot borrow value as immutable because it is also borrowed as mutable
--> $DIR/borrowck-pat-at-and-box.rs:57:11
--> $DIR/borrowck-pat-at-and-box.rs:55:11
|
LL | fn f5(ref mut a @ box ref b: Box<NC>) {
| ---------^^^^^^^-----
@ -70,104 +70,78 @@ LL | fn f5(ref mut a @ box ref b: Box<NC>) {
| | immutable borrow, by `b`, occurs here
| mutable borrow, by `a`, occurs here
error[E0382]: use of moved value
--> $DIR/borrowck-pat-at-and-box.rs:20:18
error[E0382]: borrow of moved value
--> $DIR/borrowck-pat-at-and-box.rs:32:9
|
LL | let a @ box &b = Box::new(&C);
| ---------^ ------------ move occurs because value has type `Box<&C>`, which does not implement the `Copy` trait
| | |
| | value used here after move
| value moved here
error[E0382]: use of moved value
--> $DIR/borrowck-pat-at-and-box.rs:23:17
LL | let ref a @ box b = Box::new(NC);
| ^^^^^^^^^^^^-
| | |
| | value moved here
| value borrowed here after move
|
LL | let a @ box b = Box::new(C);
| --------^ ----------- move occurs because value has type `Box<C>`, which does not implement the `Copy` trait
| | |
| | value used here after move
| value moved here
= note: move occurs because value has type `NC`, which does not implement the `Copy` trait
error[E0382]: use of moved value
--> $DIR/borrowck-pat-at-and-box.rs:33:17
|
LL | match Box::new(C) {
| ----------- move occurs because value has type `Box<C>`, which does not implement the `Copy` trait
LL | a @ box b => {}
| --------^
| | |
| | value used here after move
| value moved here
error[E0502]: cannot borrow value as mutable because it is also borrowed as immutable
--> $DIR/borrowck-pat-at-and-box.rs:45:21
error[E0502]: cannot borrow value as immutable because it is also borrowed as mutable
--> $DIR/borrowck-pat-at-and-box.rs:39:9
|
LL | let ref a @ box ref mut b = Box::new(NC);
| ------------^^^^^^^^^
| ^^^^^^^^^^^^---------
| | |
| | mutable borrow occurs here
| immutable borrow occurs here
...
LL | drop(a);
| - immutable borrow later used here
LL | *b = NC;
| ------- mutable borrow later used here
error[E0502]: cannot borrow value as immutable because it is also borrowed as mutable
--> $DIR/borrowck-pat-at-and-box.rs:51:25
--> $DIR/borrowck-pat-at-and-box.rs:43:9
|
LL | let ref a @ box ref mut b = Box::new(NC);
| ^^^^^^^^^^^^---------
| | |
| | mutable borrow occurs here
| immutable borrow occurs here
...
LL | *b = NC;
| ------- mutable borrow later used here
error[E0502]: cannot borrow value as mutable because it is also borrowed as immutable
--> $DIR/borrowck-pat-at-and-box.rs:49:9
|
LL | let ref mut a @ box ref b = Box::new(NC);
| ----------------^^^^^
| ^^^^^^^^^^^^^^^^-----
| | |
| | immutable borrow occurs here
| mutable borrow occurs here
...
LL | *a = Box::new(NC);
| -- mutable borrow later used here
LL | drop(b);
| - immutable borrow later used here
error[E0502]: cannot borrow value as immutable because it is also borrowed as mutable
--> $DIR/borrowck-pat-at-and-box.rs:65:25
error[E0502]: cannot borrow value as mutable because it is also borrowed as immutable
--> $DIR/borrowck-pat-at-and-box.rs:63:9
|
LL | ref mut a @ box ref b => {
| ----------------^^^^^
| ^^^^^^^^^^^^^^^^-----
| | |
| | immutable borrow occurs here
| mutable borrow occurs here
...
LL | *a = Box::new(NC);
| -- mutable borrow later used here
LL | drop(b);
| - immutable borrow later used here
error[E0382]: use of moved value
--> $DIR/borrowck-pat-at-and-box.rs:26:20
|
LL | fn f1(a @ box &b: Box<&C>) {}
| ---------^
| | |
| | value used here after move
| value moved here
| move occurs because value has type `Box<&C>`, which does not implement the `Copy` trait
error[E0382]: use of moved value
--> $DIR/borrowck-pat-at-and-box.rs:29:19
|
LL | fn f2(a @ box b: Box<C>) {}
| --------^
| | |
| | value used here after move
| value moved here
| move occurs because value has type `Box<C>`, which does not implement the `Copy` trait
error[E0502]: cannot borrow value as immutable because it is also borrowed as mutable
--> $DIR/borrowck-pat-at-and-box.rs:57:27
error[E0502]: cannot borrow value as mutable because it is also borrowed as immutable
--> $DIR/borrowck-pat-at-and-box.rs:55:11
|
LL | fn f5(ref mut a @ box ref b: Box<NC>) {
| ----------------^^^^^
| ^^^^^^^^^^^^^^^^-----
| | |
| | immutable borrow occurs here
| mutable borrow occurs here
...
LL | *a = Box::new(NC);
| -- mutable borrow later used here
LL | drop(b);
| - immutable borrow later used here
error: aborting due to 17 previous errors
error: aborting due to 14 previous errors
Some errors have detailed explanations: E0382, E0502.
For more information about an error, try `rustc --explain E0382`.

21
src/test/ui/pattern/bindings-after-at/borrowck-pat-by-move-and-ref-inverse.rs
View File

@ -12,18 +12,14 @@ fn main() {
fn f1(a @ ref b: U) {}
//~^ ERROR borrow of moved value
//~| ERROR borrow of moved value
fn f2(mut a @ (b @ ref c, mut d @ ref e): (U, U)) {}
//~^ ERROR borrow of moved value
//~| ERROR borrow of moved value
//~| ERROR borrow of moved value
//~| ERROR borrow of moved value
//~| ERROR borrow of moved value
//~| ERROR use of moved value
//~| ERROR use of partially moved value
fn f3(a @ [ref mut b, ref c]: [U; 2]) {}
//~^ ERROR borrow of moved value
//~| ERROR borrow of moved value
let a @ ref b = U;
//~^ ERROR borrow of moved value
@ -31,25 +27,18 @@ fn main() {
//~^ ERROR borrow of moved value
//~| ERROR borrow of moved value
//~| ERROR borrow of moved value
//~| ERROR borrow of moved value
//~| ERROR borrow of moved value
//~| ERROR use of moved value
//~| ERROR use of partially moved value
let a @ [ref mut b, ref c] = [U, U];
//~^ ERROR borrow of moved value
//~| ERROR borrow of moved value
let a @ ref b = u();
//~^ ERROR borrow of moved value
//~| ERROR borrow of moved value
let a @ (mut b @ ref mut c, d @ ref e) = (u(), u());
//~^ ERROR borrow of moved value
//~| ERROR borrow of moved value
//~| ERROR borrow of moved value
//~| ERROR borrow of moved value
//~| ERROR borrow of moved value
//~| ERROR use of moved value
//~| ERROR use of partially moved value
let a @ [ref mut b, ref c] = [u(), u()];
//~^ ERROR borrow of moved value
//~| ERROR borrow of moved value
match Some(U) {
a @ Some(ref b) => {}
@ -61,8 +50,6 @@ fn main() {
//~^ ERROR borrow of moved value
//~| ERROR borrow of moved value
//~| ERROR borrow of moved value
//~| ERROR borrow of moved value
//~| ERROR borrow of moved value
//~| ERROR use of moved value
None => {}
}
@ -83,8 +70,6 @@ fn main() {
//~^ ERROR borrow of moved value
//~| ERROR borrow of moved value
//~| ERROR borrow of moved value
//~| ERROR borrow of moved value
//~| ERROR borrow of moved value
//~| ERROR use of moved value
None => {}
}

264
src/test/ui/pattern/bindings-after-at/borrowck-pat-by-move-and-ref-inverse.stderr
View File

@ -1,5 +1,5 @@
error: borrow of moved value
--> $DIR/borrowck-pat-by-move-and-ref-inverse.rs:28:9
--> $DIR/borrowck-pat-by-move-and-ref-inverse.rs:24:9
|
LL | let a @ ref b = U;
| -^^^-----
@ -9,7 +9,7 @@ LL | let a @ ref b = U;
| move occurs because `a` has type `U` which does not implement the `Copy` trait
error: borrow of moved value
--> $DIR/borrowck-pat-by-move-and-ref-inverse.rs:30:9
--> $DIR/borrowck-pat-by-move-and-ref-inverse.rs:26:9
|
LL | let a @ (mut b @ ref mut c, d @ ref e) = (U, U);
| -^^^^^^^^^^^^---------^^^^^^-----^
@ -20,7 +20,7 @@ LL | let a @ (mut b @ ref mut c, d @ ref e) = (U, U);
| move occurs because `a` has type `(U, U)` which does not implement the `Copy` trait
error: borrow of moved value
--> $DIR/borrowck-pat-by-move-and-ref-inverse.rs:30:14
--> $DIR/borrowck-pat-by-move-and-ref-inverse.rs:26:14
|
LL | let a @ (mut b @ ref mut c, d @ ref e) = (U, U);
| -----^^^---------
@ -30,7 +30,7 @@ LL | let a @ (mut b @ ref mut c, d @ ref e) = (U, U);
| move occurs because `b` has type `U` which does not implement the `Copy` trait
error: borrow of moved value
--> $DIR/borrowck-pat-by-move-and-ref-inverse.rs:30:33
--> $DIR/borrowck-pat-by-move-and-ref-inverse.rs:26:33
|
LL | let a @ (mut b @ ref mut c, d @ ref e) = (U, U);
| -^^^-----
@ -40,7 +40,7 @@ LL | let a @ (mut b @ ref mut c, d @ ref e) = (U, U);
| move occurs because `d` has type `U` which does not implement the `Copy` trait
error: borrow of moved value
--> $DIR/borrowck-pat-by-move-and-ref-inverse.rs:37:9
--> $DIR/borrowck-pat-by-move-and-ref-inverse.rs:31:9
|
LL | let a @ [ref mut b, ref c] = [U, U];
| -^^^^---------^^-----^
@ -51,7 +51,7 @@ LL | let a @ [ref mut b, ref c] = [U, U];
| move occurs because `a` has type `[U; 2]` which does not implement the `Copy` trait
error: borrow of moved value
--> $DIR/borrowck-pat-by-move-and-ref-inverse.rs:40:9
--> $DIR/borrowck-pat-by-move-and-ref-inverse.rs:33:9
|
LL | let a @ ref b = u();
| -^^^-----
@ -61,7 +61,7 @@ LL | let a @ ref b = u();
| move occurs because `a` has type `U` which does not implement the `Copy` trait
error: borrow of moved value
--> $DIR/borrowck-pat-by-move-and-ref-inverse.rs:43:9
--> $DIR/borrowck-pat-by-move-and-ref-inverse.rs:35:9
|
LL | let a @ (mut b @ ref mut c, d @ ref e) = (u(), u());
| -^^^^^^^^^^^^---------^^^^^^-----^
@ -72,7 +72,7 @@ LL | let a @ (mut b @ ref mut c, d @ ref e) = (u(), u());
| move occurs because `a` has type `(U, U)` which does not implement the `Copy` trait
error: borrow of moved value
--> $DIR/borrowck-pat-by-move-and-ref-inverse.rs:43:14
--> $DIR/borrowck-pat-by-move-and-ref-inverse.rs:35:14
|
LL | let a @ (mut b @ ref mut c, d @ ref e) = (u(), u());
| -----^^^---------
@ -82,7 +82,7 @@ LL | let a @ (mut b @ ref mut c, d @ ref e) = (u(), u());
| move occurs because `b` has type `U` which does not implement the `Copy` trait
error: borrow of moved value
--> $DIR/borrowck-pat-by-move-and-ref-inverse.rs:43:33
--> $DIR/borrowck-pat-by-move-and-ref-inverse.rs:35:33
|
LL | let a @ (mut b @ ref mut c, d @ ref e) = (u(), u());
| -^^^-----
@ -92,7 +92,7 @@ LL | let a @ (mut b @ ref mut c, d @ ref e) = (u(), u());
| move occurs because `d` has type `U` which does not implement the `Copy` trait
error: borrow of moved value
--> $DIR/borrowck-pat-by-move-and-ref-inverse.rs:50:9
--> $DIR/borrowck-pat-by-move-and-ref-inverse.rs:40:9
|
LL | let a @ [ref mut b, ref c] = [u(), u()];
| -^^^^---------^^-----^
@ -103,7 +103,7 @@ LL | let a @ [ref mut b, ref c] = [u(), u()];
| move occurs because `a` has type `[U; 2]` which does not implement the `Copy` trait
error: borrow of moved value
--> $DIR/borrowck-pat-by-move-and-ref-inverse.rs:55:9
--> $DIR/borrowck-pat-by-move-and-ref-inverse.rs:44:9
|
LL | a @ Some(ref b) => {}
| -^^^^^^^^-----^
@ -113,7 +113,7 @@ LL | a @ Some(ref b) => {}
| move occurs because `a` has type `Option<U>` which does not implement the `Copy` trait
error: borrow of moved value
--> $DIR/borrowck-pat-by-move-and-ref-inverse.rs:60:9
--> $DIR/borrowck-pat-by-move-and-ref-inverse.rs:49:9
|
LL | a @ Some((mut b @ ref mut c, d @ ref e)) => {}
| -^^^^^^^^^^^^^^^^^---------^^^^^^-----^^
@ -124,7 +124,7 @@ LL | a @ Some((mut b @ ref mut c, d @ ref e)) => {}
| move occurs because `a` has type `Option<(U, U)>` which does not implement the `Copy` trait
error: borrow of moved value
--> $DIR/borrowck-pat-by-move-and-ref-inverse.rs:60:19
--> $DIR/borrowck-pat-by-move-and-ref-inverse.rs:49:19
|
LL | a @ Some((mut b @ ref mut c, d @ ref e)) => {}
| -----^^^---------
@ -134,7 +134,7 @@ LL | a @ Some((mut b @ ref mut c, d @ ref e)) => {}
| move occurs because `b` has type `U` which does not implement the `Copy` trait
error: borrow of moved value
--> $DIR/borrowck-pat-by-move-and-ref-inverse.rs:60:38
--> $DIR/borrowck-pat-by-move-and-ref-inverse.rs:49:38
|
LL | a @ Some((mut b @ ref mut c, d @ ref e)) => {}
| -^^^-----
@ -144,7 +144,7 @@ LL | a @ Some((mut b @ ref mut c, d @ ref e)) => {}
| move occurs because `d` has type `U` which does not implement the `Copy` trait
error: borrow of moved value
--> $DIR/borrowck-pat-by-move-and-ref-inverse.rs:70:9
--> $DIR/borrowck-pat-by-move-and-ref-inverse.rs:57:9
|
LL | mut a @ Some([ref b, ref mut c]) => {}
| -----^^^^^^^^^-----^^---------^^
@ -155,7 +155,7 @@ LL | mut a @ Some([ref b, ref mut c]) => {}
| move occurs because `a` has type `Option<[U; 2]>` which does not implement the `Copy` trait
error: borrow of moved value
--> $DIR/borrowck-pat-by-move-and-ref-inverse.rs:76:9
--> $DIR/borrowck-pat-by-move-and-ref-inverse.rs:63:9
|
LL | a @ Some(ref b) => {}
| -^^^^^^^^-----^
@ -165,7 +165,7 @@ LL | a @ Some(ref b) => {}
| move occurs because `a` has type `Option<U>` which does not implement the `Copy` trait
error: borrow of moved value
--> $DIR/borrowck-pat-by-move-and-ref-inverse.rs:82:9
--> $DIR/borrowck-pat-by-move-and-ref-inverse.rs:69:9
|
LL | a @ Some((mut b @ ref mut c, d @ ref e)) => {}
| -^^^^^^^^^^^^^^^^^---------^^^^^^-----^^
@ -176,7 +176,7 @@ LL | a @ Some((mut b @ ref mut c, d @ ref e)) => {}
| move occurs because `a` has type `Option<(U, U)>` which does not implement the `Copy` trait
error: borrow of moved value
--> $DIR/borrowck-pat-by-move-and-ref-inverse.rs:82:19
--> $DIR/borrowck-pat-by-move-and-ref-inverse.rs:69:19
|
LL | a @ Some((mut b @ ref mut c, d @ ref e)) => {}
| -----^^^---------
@ -186,7 +186,7 @@ LL | a @ Some((mut b @ ref mut c, d @ ref e)) => {}
| move occurs because `b` has type `U` which does not implement the `Copy` trait
error: borrow of moved value
--> $DIR/borrowck-pat-by-move-and-ref-inverse.rs:82:38
--> $DIR/borrowck-pat-by-move-and-ref-inverse.rs:69:38
|
LL | a @ Some((mut b @ ref mut c, d @ ref e)) => {}
| -^^^-----
@ -196,7 +196,7 @@ LL | a @ Some((mut b @ ref mut c, d @ ref e)) => {}
| move occurs because `d` has type `U` which does not implement the `Copy` trait
error: borrow of moved value
--> $DIR/borrowck-pat-by-move-and-ref-inverse.rs:92:9
--> $DIR/borrowck-pat-by-move-and-ref-inverse.rs:77:9
|
LL | mut a @ Some([ref b, ref mut c]) => {}
| -----^^^^^^^^^-----^^---------^^
@ -217,7 +217,7 @@ LL | fn f1(a @ ref b: U) {}
| move occurs because `a` has type `U` which does not implement the `Copy` trait
error: borrow of moved value
--> $DIR/borrowck-pat-by-move-and-ref-inverse.rs:17:11
--> $DIR/borrowck-pat-by-move-and-ref-inverse.rs:16:11
|
LL | fn f2(mut a @ (b @ ref c, mut d @ ref e): (U, U)) {}
| -----^^^^^^^^-----^^^^^^^^^^-----^
@ -228,7 +228,7 @@ LL | fn f2(mut a @ (b @ ref c, mut d @ ref e): (U, U)) {}
| move occurs because `a` has type `(U, U)` which does not implement the `Copy` trait
error: borrow of moved value
--> $DIR/borrowck-pat-by-move-and-ref-inverse.rs:17:20
--> $DIR/borrowck-pat-by-move-and-ref-inverse.rs:16:20
|
LL | fn f2(mut a @ (b @ ref c, mut d @ ref e): (U, U)) {}
| -^^^-----
@ -238,7 +238,7 @@ LL | fn f2(mut a @ (b @ ref c, mut d @ ref e): (U, U)) {}
| move occurs because `b` has type `U` which does not implement the `Copy` trait
error: borrow of moved value
--> $DIR/borrowck-pat-by-move-and-ref-inverse.rs:17:31
--> $DIR/borrowck-pat-by-move-and-ref-inverse.rs:16:31
|
LL | fn f2(mut a @ (b @ ref c, mut d @ ref e): (U, U)) {}
| -----^^^-----
@ -248,7 +248,7 @@ LL | fn f2(mut a @ (b @ ref c, mut d @ ref e): (U, U)) {}
| move occurs because `d` has type `U` which does not implement the `Copy` trait
error: borrow of moved value
--> $DIR/borrowck-pat-by-move-and-ref-inverse.rs:24:11
--> $DIR/borrowck-pat-by-move-and-ref-inverse.rs:21:11
|
LL | fn f3(a @ [ref mut b, ref c]: [U; 2]) {}
| -^^^^---------^^-----^
@ -258,112 +258,30 @@ LL | fn f3(a @ [ref mut b, ref c]: [U; 2]) {}
| value moved into `a` here
| move occurs because `a` has type `[U; 2]` which does not implement the `Copy` trait
error[E0382]: borrow of moved value
--> $DIR/borrowck-pat-by-move-and-ref-inverse.rs:30:22
error[E0382]: use of partially moved value
--> $DIR/borrowck-pat-by-move-and-ref-inverse.rs:26:9
|
LL | let a @ (mut b @ ref mut c, d @ ref e) = (U, U);
| --------^^^^^^^^^
| | |
| | value borrowed here after move
| value moved here
|
= note: move occurs because value has type `U`, which does not implement the `Copy` trait
error[E0382]: use of moved value
--> $DIR/borrowck-pat-by-move-and-ref-inverse.rs:30:33
|
LL | let a @ (mut b @ ref mut c, d @ ref e) = (U, U);
| ------------------------^^^^^^^^^- ------ move occurs because value has type `(U, U)`, which does not implement the `Copy` trait
| ^^^^^^^^^^^^^^^^^^^^^^^^---------^
| | |
| | value used here after move
| value moved here
error[E0382]: borrow of moved value
--> $DIR/borrowck-pat-by-move-and-ref-inverse.rs:30:37
| | value partially moved here
| value used here after partial move
|
LL | let a @ (mut b @ ref mut c, d @ ref e) = (U, U);
| ----^^^^^
| | |
| | value borrowed here after move
| value moved here
|
= note: move occurs because value has type `U`, which does not implement the `Copy` trait
= note: partial move occurs because value has type `U`, which does not implement the `Copy` trait
error[E0382]: borrow of moved value
--> $DIR/borrowck-pat-by-move-and-ref-inverse.rs:37:25
|
LL | let a @ [ref mut b, ref c] = [U, U];
| ----------------^^^^^- ------ move occurs because value has type `[U; 2]`, which does not implement the `Copy` trait
| | |
| | value borrowed here after move
| value moved here
error[E0382]: borrow of moved value
--> $DIR/borrowck-pat-by-move-and-ref-inverse.rs:40:13
|
LL | let a @ ref b = u();
| ----^^^^^ --- move occurs because value has type `U`, which does not implement the `Copy` trait
| | |
| | value borrowed here after move
| value moved here
error[E0382]: borrow of moved value
--> $DIR/borrowck-pat-by-move-and-ref-inverse.rs:43:22
error[E0382]: use of partially moved value
--> $DIR/borrowck-pat-by-move-and-ref-inverse.rs:35:9
|
LL | let a @ (mut b @ ref mut c, d @ ref e) = (u(), u());
| --------^^^^^^^^^
| | |
| | value borrowed here after move
| value moved here
|
= note: move occurs because value has type `U`, which does not implement the `Copy` trait
error[E0382]: use of moved value
--> $DIR/borrowck-pat-by-move-and-ref-inverse.rs:43:33
|
LL | let a @ (mut b @ ref mut c, d @ ref e) = (u(), u());
| ------------------------^^^^^^^^^- ---------- move occurs because value has type `(U, U)`, which does not implement the `Copy` trait
| ^^^^^^^^^^^^^^^^^^^^^^^^---------^
| | |
| | value used here after move
| value moved here
error[E0382]: borrow of moved value
--> $DIR/borrowck-pat-by-move-and-ref-inverse.rs:43:37
| | value partially moved here
| value used here after partial move
|
LL | let a @ (mut b @ ref mut c, d @ ref e) = (u(), u());
| ----^^^^^
| | |
| | value borrowed here after move
| value moved here
|
= note: move occurs because value has type `U`, which does not implement the `Copy` trait
error[E0382]: borrow of moved value
--> $DIR/borrowck-pat-by-move-and-ref-inverse.rs:50:25
|
LL | let a @ [ref mut b, ref c] = [u(), u()];
| ----------------^^^^^- ---------- move occurs because value has type `[U; 2]`, which does not implement the `Copy` trait
| | |
| | value borrowed here after move
| value moved here
error[E0382]: borrow of moved value
--> $DIR/borrowck-pat-by-move-and-ref-inverse.rs:60:27
|
LL | a @ Some((mut b @ ref mut c, d @ ref e)) => {}
| --------^^^^^^^^^
| | |
| | value borrowed here after move
| value moved here
|
= note: move occurs because value has type `U`, which does not implement the `Copy` trait
help: borrow this field in the pattern to avoid moving the value
|
LL | a @ Some((ref mut b @ ref mut c, d @ ref e)) => {}
| ^^^
= note: partial move occurs because value has type `U`, which does not implement the `Copy` trait
error[E0382]: use of moved value
--> $DIR/borrowck-pat-by-move-and-ref-inverse.rs:60:38
--> $DIR/borrowck-pat-by-move-and-ref-inverse.rs:49:38
|
LL | match Some((U, U)) {
| ------------ move occurs because value has type `Option<(U, U)>`, which does not implement the `Copy` trait
@ -374,22 +292,7 @@ LL | a @ Some((mut b @ ref mut c, d @ ref e)) => {}
| value moved here
error[E0382]: borrow of moved value
--> $DIR/borrowck-pat-by-move-and-ref-inverse.rs:60:42
|
LL | a @ Some((mut b @ ref mut c, d @ ref e)) => {}
| ----^^^^^
| | |
| | value borrowed here after move
| value moved here
|
= note: move occurs because value has type `U`, which does not implement the `Copy` trait
help: borrow this field in the pattern to avoid moving the value
|
LL | a @ Some((mut b @ ref mut c, ref d @ ref e)) => {}
| ^^^
error[E0382]: borrow of moved value
--> $DIR/borrowck-pat-by-move-and-ref-inverse.rs:70:30
--> $DIR/borrowck-pat-by-move-and-ref-inverse.rs:57:30
|
LL | match Some([U, U]) {
| ------------ move occurs because value has type `Option<[U; 2]>`, which does not implement the `Copy` trait
@ -400,7 +303,7 @@ LL | mut a @ Some([ref b, ref mut c]) => {}
| value moved here
error[E0382]: borrow of moved value
--> $DIR/borrowck-pat-by-move-and-ref-inverse.rs:76:18
--> $DIR/borrowck-pat-by-move-and-ref-inverse.rs:63:18
|
LL | match Some(u()) {
| --------- move occurs because value has type `Option<U>`, which does not implement the `Copy` trait
@ -410,23 +313,8 @@ LL | a @ Some(ref b) => {}
| | value borrowed here after move
| value moved here
error[E0382]: borrow of moved value
--> $DIR/borrowck-pat-by-move-and-ref-inverse.rs:82:27
|
LL | a @ Some((mut b @ ref mut c, d @ ref e)) => {}
| --------^^^^^^^^^
| | |
| | value borrowed here after move
| value moved here
|
= note: move occurs because value has type `U`, which does not implement the `Copy` trait
help: borrow this field in the pattern to avoid moving the value
|
LL | a @ Some((ref mut b @ ref mut c, d @ ref e)) => {}
| ^^^
error[E0382]: use of moved value
--> $DIR/borrowck-pat-by-move-and-ref-inverse.rs:82:38
--> $DIR/borrowck-pat-by-move-and-ref-inverse.rs:69:38
|
LL | match Some((u(), u())) {
| ---------------- move occurs because value has type `Option<(U, U)>`, which does not implement the `Copy` trait
@ -437,22 +325,7 @@ LL | a @ Some((mut b @ ref mut c, d @ ref e)) => {}
| value moved here
error[E0382]: borrow of moved value
--> $DIR/borrowck-pat-by-move-and-ref-inverse.rs:82:42
|
LL | a @ Some((mut b @ ref mut c, d @ ref e)) => {}
| ----^^^^^
| | |
| | value borrowed here after move
| value moved here
|
= note: move occurs because value has type `U`, which does not implement the `Copy` trait
help: borrow this field in the pattern to avoid moving the value
|
LL | a @ Some((mut b @ ref mut c, ref d @ ref e)) => {}
| ^^^
error[E0382]: borrow of moved value
--> $DIR/borrowck-pat-by-move-and-ref-inverse.rs:92:30
--> $DIR/borrowck-pat-by-move-and-ref-inverse.rs:77:30
|
LL | match Some([u(), u()]) {
| ---------------- move occurs because value has type `Option<[U; 2]>`, which does not implement the `Copy` trait
@ -462,58 +335,17 @@ LL | mut a @ Some([ref b, ref mut c]) => {}
| | value borrowed here after move
| value moved here
error[E0382]: borrow of moved value
--> $DIR/borrowck-pat-by-move-and-ref-inverse.rs:13:15
|
LL | fn f1(a @ ref b: U) {}
| ----^^^^^
| | |
| | value borrowed here after move
| value moved here
| move occurs because value has type `U`, which does not implement the `Copy` trait
error[E0382]: borrow of moved value
--> $DIR/borrowck-pat-by-move-and-ref-inverse.rs:17:24
error[E0382]: use of partially moved value
--> $DIR/borrowck-pat-by-move-and-ref-inverse.rs:16:11
|
LL | fn f2(mut a @ (b @ ref c, mut d @ ref e): (U, U)) {}
| ----^^^^^
| | |
| | value borrowed here after move
| value moved here
|
= note: move occurs because value has type `U`, which does not implement the `Copy` trait
error[E0382]: use of moved value
--> $DIR/borrowck-pat-by-move-and-ref-inverse.rs:17:31
|
LL | fn f2(mut a @ (b @ ref c, mut d @ ref e): (U, U)) {}
| --------------------^^^^^^^^^^^^^-
| ^^^^^^^^^^^^^^^^^^^^-------------^
| | |
| | value used here after move
| value moved here
| move occurs because value has type `(U, U)`, which does not implement the `Copy` trait
error[E0382]: borrow of moved value
--> $DIR/borrowck-pat-by-move-and-ref-inverse.rs:17:39
| | value partially moved here
| value used here after partial move
|
LL | fn f2(mut a @ (b @ ref c, mut d @ ref e): (U, U)) {}
| --------^^^^^
| | |
| | value borrowed here after move
| value moved here
|
= note: move occurs because value has type `U`, which does not implement the `Copy` trait
= note: partial move occurs because value has type `U`, which does not implement the `Copy` trait
error[E0382]: borrow of moved value
--> $DIR/borrowck-pat-by-move-and-ref-inverse.rs:24:27
|
LL | fn f3(a @ [ref mut b, ref c]: [U; 2]) {}
| ----------------^^^^^-
| | |
| | value borrowed here after move
| value moved here
| move occurs because value has type `[U; 2]`, which does not implement the `Copy` trait
error: aborting due to 48 previous errors
error: aborting due to 33 previous errors
For more information about this error, try `rustc --explain E0382`.

11
src/test/ui/pattern/bindings-after-at/borrowck-pat-by-move-and-ref.rs
View File

@ -12,12 +12,16 @@ fn main() {
fn f1(ref a @ b: U) {}
//~^ ERROR cannot move out of value because it is borrowed
//~| ERROR borrow of moved value
fn f2(ref a @ (ref b @ mut c, ref d @ e): (U, U)) {}
//~^ ERROR cannot move out of value because it is borrowed
//~| ERROR cannot move out of value because it is borrowed
//~| ERROR cannot move out of value because it is borrowed
//~| ERROR borrow of moved value
//~| ERROR borrow of moved value
fn f3(ref mut a @ [b, mut c]: [U; 2]) {}
//~^ ERROR cannot move out of value because it is borrowed
//~| ERROR borrow of partially moved value
let ref a @ b = U;
//~^ ERROR cannot move out of value because it is borrowed
@ -27,14 +31,19 @@ fn main() {
//~| ERROR cannot move out of value because it is borrowed
let ref mut a @ [b, mut c] = [U, U];
//~^ ERROR cannot move out of value because it is borrowed
//~| ERROR borrow of partially moved value
let ref a @ b = u();
//~^ ERROR cannot move out of value because it is borrowed
//~| ERROR borrow of moved value
let ref a @ (ref b @ mut c, ref d @ e) = (u(), u());
//~^ ERROR cannot move out of value because it is borrowed
//~| ERROR cannot move out of value because it is borrowed
//~| ERROR cannot move out of value because it is borrowed
//~| ERROR borrow of moved value
//~| ERROR borrow of moved value
let ref mut a @ [b, mut c] = [u(), u()];
//~^ ERROR cannot move out of value because it is borrowed
//~| ERROR borrow of partially moved value
match Some(U) {
ref a @ Some(b) => {}
@ -63,6 +72,8 @@ fn main() {
//~^ ERROR cannot move out of value because it is borrowed
//~| ERROR cannot move out of value because it is borrowed
//~| ERROR cannot move out of value because it is borrowed
//~| ERROR borrow of moved value
//~| ERROR borrow of moved value
None => {}
}
match Some([u(), u()]) {

177
src/test/ui/pattern/bindings-after-at/borrowck-pat-by-move-and-ref.stderr
View File

@ -1,5 +1,5 @@
error: cannot move out of value because it is borrowed
--> $DIR/borrowck-pat-by-move-and-ref.rs:22:9
--> $DIR/borrowck-pat-by-move-and-ref.rs:26:9
|
LL | let ref a @ b = U;
| -----^^^-
@ -8,7 +8,7 @@ LL | let ref a @ b = U;
| value borrowed, by `a`, here
error: cannot move out of value because it is borrowed
--> $DIR/borrowck-pat-by-move-and-ref.rs:24:9
--> $DIR/borrowck-pat-by-move-and-ref.rs:28:9
|
LL | let ref a @ (ref b @ mut c, ref d @ e) = (U, U);
| -----^^^^^^^^^^^^-----^^^^^^^^^^-^
@ -18,7 +18,7 @@ LL | let ref a @ (ref b @ mut c, ref d @ e) = (U, U);
| value borrowed, by `a`, here
error: cannot move out of value because it is borrowed
--> $DIR/borrowck-pat-by-move-and-ref.rs:24:18
--> $DIR/borrowck-pat-by-move-and-ref.rs:28:18
|
LL | let ref a @ (ref b @ mut c, ref d @ e) = (U, U);
| -----^^^-----
@ -27,7 +27,7 @@ LL | let ref a @ (ref b @ mut c, ref d @ e) = (U, U);
| value borrowed, by `b`, here
error: cannot move out of value because it is borrowed
--> $DIR/borrowck-pat-by-move-and-ref.rs:24:33
--> $DIR/borrowck-pat-by-move-and-ref.rs:28:33
|
LL | let ref a @ (ref b @ mut c, ref d @ e) = (U, U);
| -----^^^-
@ -36,7 +36,7 @@ LL | let ref a @ (ref b @ mut c, ref d @ e) = (U, U);
| value borrowed, by `d`, here
error: cannot move out of value because it is borrowed
--> $DIR/borrowck-pat-by-move-and-ref.rs:28:9
--> $DIR/borrowck-pat-by-move-and-ref.rs:32:9
|
LL | let ref mut a @ [b, mut c] = [U, U];
| ---------^^^^-^^-----^
@ -46,7 +46,7 @@ LL | let ref mut a @ [b, mut c] = [U, U];
| value borrowed, by `a`, here
error: cannot move out of value because it is borrowed
--> $DIR/borrowck-pat-by-move-and-ref.rs:30:9
--> $DIR/borrowck-pat-by-move-and-ref.rs:35:9
|
LL | let ref a @ b = u();
| -----^^^-
@ -55,7 +55,7 @@ LL | let ref a @ b = u();
| value borrowed, by `a`, here
error: cannot move out of value because it is borrowed
--> $DIR/borrowck-pat-by-move-and-ref.rs:32:9
--> $DIR/borrowck-pat-by-move-and-ref.rs:38:9
|
LL | let ref a @ (ref b @ mut c, ref d @ e) = (u(), u());
| -----^^^^^^^^^^^^-----^^^^^^^^^^-^
@ -65,7 +65,7 @@ LL | let ref a @ (ref b @ mut c, ref d @ e) = (u(), u());
| value borrowed, by `a`, here
error: cannot move out of value because it is borrowed
--> $DIR/borrowck-pat-by-move-and-ref.rs:32:18
--> $DIR/borrowck-pat-by-move-and-ref.rs:38:18
|
LL | let ref a @ (ref b @ mut c, ref d @ e) = (u(), u());
| -----^^^-----
@ -74,7 +74,7 @@ LL | let ref a @ (ref b @ mut c, ref d @ e) = (u(), u());
| value borrowed, by `b`, here
error: cannot move out of value because it is borrowed
--> $DIR/borrowck-pat-by-move-and-ref.rs:32:33
--> $DIR/borrowck-pat-by-move-and-ref.rs:38:33
|
LL | let ref a @ (ref b @ mut c, ref d @ e) = (u(), u());
| -----^^^-
@ -83,7 +83,7 @@ LL | let ref a @ (ref b @ mut c, ref d @ e) = (u(), u());
| value borrowed, by `d`, here
error: cannot move out of value because it is borrowed
--> $DIR/borrowck-pat-by-move-and-ref.rs:36:9
--> $DIR/borrowck-pat-by-move-and-ref.rs:44:9
|
LL | let ref mut a @ [b, mut c] = [u(), u()];
| ---------^^^^-^^-----^
@ -93,7 +93,7 @@ LL | let ref mut a @ [b, mut c] = [u(), u()];
| value borrowed, by `a`, here
error: cannot move out of value because it is borrowed
--> $DIR/borrowck-pat-by-move-and-ref.rs:40:9
--> $DIR/borrowck-pat-by-move-and-ref.rs:49:9
|
LL | ref a @ Some(b) => {}
| -----^^^^^^^^-^
@ -102,7 +102,7 @@ LL | ref a @ Some(b) => {}
| value borrowed, by `a`, here
error: cannot move out of value because it is borrowed
--> $DIR/borrowck-pat-by-move-and-ref.rs:45:9
--> $DIR/borrowck-pat-by-move-and-ref.rs:54:9
|
LL | ref a @ Some((ref b @ mut c, ref d @ e)) => {}
| -----^^^^^^^^^^^^^^^^^-----^^^^^^^^^^-^^
@ -112,7 +112,7 @@ LL | ref a @ Some((ref b @ mut c, ref d @ e)) => {}
| value borrowed, by `a`, here
error: cannot move out of value because it is borrowed
--> $DIR/borrowck-pat-by-move-and-ref.rs:45:23
--> $DIR/borrowck-pat-by-move-and-ref.rs:54:23
|
LL | ref a @ Some((ref b @ mut c, ref d @ e)) => {}
| -----^^^-----
@ -121,7 +121,7 @@ LL | ref a @ Some((ref b @ mut c, ref d @ e)) => {}
| value borrowed, by `b`, here
error: cannot move out of value because it is borrowed
--> $DIR/borrowck-pat-by-move-and-ref.rs:45:38
--> $DIR/borrowck-pat-by-move-and-ref.rs:54:38
|
LL | ref a @ Some((ref b @ mut c, ref d @ e)) => {}
| -----^^^-
@ -130,7 +130,7 @@ LL | ref a @ Some((ref b @ mut c, ref d @ e)) => {}
| value borrowed, by `d`, here
error: cannot move out of value because it is borrowed
--> $DIR/borrowck-pat-by-move-and-ref.rs:52:9
--> $DIR/borrowck-pat-by-move-and-ref.rs:61:9
|
LL | ref mut a @ Some([b, mut c]) => {}
| ---------^^^^^^^^^-^^-----^^
@ -140,7 +140,7 @@ LL | ref mut a @ Some([b, mut c]) => {}
| value borrowed, by `a`, here
error: cannot move out of value because it is borrowed
--> $DIR/borrowck-pat-by-move-and-ref.rs:57:9
--> $DIR/borrowck-pat-by-move-and-ref.rs:66:9
|
LL | ref a @ Some(b) => {}
| -----^^^^^^^^-^
@ -149,7 +149,7 @@ LL | ref a @ Some(b) => {}
| value borrowed, by `a`, here
error: cannot move out of value because it is borrowed
--> $DIR/borrowck-pat-by-move-and-ref.rs:62:9
--> $DIR/borrowck-pat-by-move-and-ref.rs:71:9
|
LL | ref a @ Some((ref b @ mut c, ref d @ e)) => {}
| -----^^^^^^^^^^^^^^^^^-----^^^^^^^^^^-^^
@ -159,7 +159,7 @@ LL | ref a @ Some((ref b @ mut c, ref d @ e)) => {}
| value borrowed, by `a`, here
error: cannot move out of value because it is borrowed
--> $DIR/borrowck-pat-by-move-and-ref.rs:62:23
--> $DIR/borrowck-pat-by-move-and-ref.rs:71:23
|
LL | ref a @ Some((ref b @ mut c, ref d @ e)) => {}
| -----^^^-----
@ -168,7 +168,7 @@ LL | ref a @ Some((ref b @ mut c, ref d @ e)) => {}
| value borrowed, by `b`, here
error: cannot move out of value because it is borrowed
--> $DIR/borrowck-pat-by-move-and-ref.rs:62:38
--> $DIR/borrowck-pat-by-move-and-ref.rs:71:38
|
LL | ref a @ Some((ref b @ mut c, ref d @ e)) => {}
| -----^^^-
@ -177,7 +177,7 @@ LL | ref a @ Some((ref b @ mut c, ref d @ e)) => {}
| value borrowed, by `d`, here
error: cannot move out of value because it is borrowed
--> $DIR/borrowck-pat-by-move-and-ref.rs:69:9
--> $DIR/borrowck-pat-by-move-and-ref.rs:80:9
|
LL | ref mut a @ Some([b, mut c]) => {}
| ---------^^^^^^^^^-^^-----^^
@ -196,7 +196,7 @@ LL | fn f1(ref a @ b: U) {}
| value borrowed, by `a`, here
error: cannot move out of value because it is borrowed
--> $DIR/borrowck-pat-by-move-and-ref.rs:15:11
--> $DIR/borrowck-pat-by-move-and-ref.rs:16:11
|
LL | fn f2(ref a @ (ref b @ mut c, ref d @ e): (U, U)) {}
| -----^^^^^^^^^^^^-----^^^^^^^^^^-^
@ -206,7 +206,7 @@ LL | fn f2(ref a @ (ref b @ mut c, ref d @ e): (U, U)) {}
| value borrowed, by `a`, here
error: cannot move out of value because it is borrowed
--> $DIR/borrowck-pat-by-move-and-ref.rs:15:20
--> $DIR/borrowck-pat-by-move-and-ref.rs:16:20
|
LL | fn f2(ref a @ (ref b @ mut c, ref d @ e): (U, U)) {}
| -----^^^-----
@ -215,7 +215,7 @@ LL | fn f2(ref a @ (ref b @ mut c, ref d @ e): (U, U)) {}
| value borrowed, by `b`, here
error: cannot move out of value because it is borrowed
--> $DIR/borrowck-pat-by-move-and-ref.rs:15:35
--> $DIR/borrowck-pat-by-move-and-ref.rs:16:35
|
LL | fn f2(ref a @ (ref b @ mut c, ref d @ e): (U, U)) {}
| -----^^^-
@ -224,7 +224,7 @@ LL | fn f2(ref a @ (ref b @ mut c, ref d @ e): (U, U)) {}
| value borrowed, by `d`, here
error: cannot move out of value because it is borrowed
--> $DIR/borrowck-pat-by-move-and-ref.rs:19:11
--> $DIR/borrowck-pat-by-move-and-ref.rs:22:11
|
LL | fn f3(ref mut a @ [b, mut c]: [U; 2]) {}
| ---------^^^^-^^-----^
@ -233,5 +233,132 @@ LL | fn f3(ref mut a @ [b, mut c]: [U; 2]) {}
| | value moved into `b` here
| value borrowed, by `a`, here
error: aborting due to 25 previous errors
error[E0382]: borrow of partially moved value
--> $DIR/borrowck-pat-by-move-and-ref.rs:32:9
|
LL | let ref mut a @ [b, mut c] = [U, U];
| ^^^^^^^^^^^^^^^^-----^
| | |
| | value partially moved here
| value borrowed here after partial move
|
= note: partial move occurs because value has type `U`, which does not implement the `Copy` trait
error[E0382]: borrow of moved value
--> $DIR/borrowck-pat-by-move-and-ref.rs:35:9
|
LL | let ref a @ b = u();
| ^^^^^^^^- --- move occurs because value has type `U`, which does not implement the `Copy` trait
| | |
| | value moved here
| value borrowed here after move
error[E0382]: borrow of moved value
--> $DIR/borrowck-pat-by-move-and-ref.rs:38:18
|
LL | let ref a @ (ref b @ mut c, ref d @ e) = (u(), u());
| ^^^^^^^^-----
| | |
| | value moved here
| value borrowed here after move
|
= note: move occurs because value has type `U`, which does not implement the `Copy` trait
error[E0382]: borrow of moved value
--> $DIR/borrowck-pat-by-move-and-ref.rs:38:33
|
LL | let ref a @ (ref b @ mut c, ref d @ e) = (u(), u());
| ^^^^^^^^-
| | |
| | value moved here
| value borrowed here after move
|
= note: move occurs because value has type `U`, which does not implement the `Copy` trait
error[E0382]: borrow of partially moved value
--> $DIR/borrowck-pat-by-move-and-ref.rs:44:9
|
LL | let ref mut a @ [b, mut c] = [u(), u()];
| ^^^^^^^^^^^^^^^^-----^
| | |
| | value partially moved here
| value borrowed here after partial move
|
= note: partial move occurs because value has type `U`, which does not implement the `Copy` trait
error[E0382]: borrow of moved value
--> $DIR/borrowck-pat-by-move-and-ref.rs:71:23
|
LL | ref a @ Some((ref b @ mut c, ref d @ e)) => {}
| ^^^^^^^^-----
| | |
| | value moved here
| value borrowed here after move
|
= note: move occurs because value has type `U`, which does not implement the `Copy` trait
help: borrow this field in the pattern to avoid moving the value
|
LL | ref a @ Some((ref b @ ref mut c, ref d @ e)) => {}
| ^^^
error[E0382]: borrow of moved value
--> $DIR/borrowck-pat-by-move-and-ref.rs:71:38
|
LL | ref a @ Some((ref b @ mut c, ref d @ e)) => {}
| ^^^^^^^^-
| | |
| | value moved here
| value borrowed here after move
|
= note: move occurs because value has type `U`, which does not implement the `Copy` trait
help: borrow this field in the pattern to avoid moving the value
|
LL | ref a @ Some((ref b @ mut c, ref d @ ref e)) => {}
| ^^^
error[E0382]: borrow of moved value
--> $DIR/borrowck-pat-by-move-and-ref.rs:13:11
|
LL | fn f1(ref a @ b: U) {}
| ^^^^^^^^-
| | |
| | value moved here
| value borrowed here after move
| move occurs because value has type `U`, which does not implement the `Copy` trait
error[E0382]: borrow of moved value
--> $DIR/borrowck-pat-by-move-and-ref.rs:16:20
|
LL | fn f2(ref a @ (ref b @ mut c, ref d @ e): (U, U)) {}
| ^^^^^^^^-----
| | |
| | value moved here
| value borrowed here after move
|
= note: move occurs because value has type `U`, which does not implement the `Copy` trait
error[E0382]: borrow of moved value
--> $DIR/borrowck-pat-by-move-and-ref.rs:16:35
|
LL | fn f2(ref a @ (ref b @ mut c, ref d @ e): (U, U)) {}
| ^^^^^^^^-
| | |
| | value moved here
| value borrowed here after move
|
= note: move occurs because value has type `U`, which does not implement the `Copy` trait
error[E0382]: borrow of partially moved value
--> $DIR/borrowck-pat-by-move-and-ref.rs:22:11
|
LL | fn f3(ref mut a @ [b, mut c]: [U; 2]) {}
| ^^^^^^^^^^^^^^^^-----^
| | |
| | value partially moved here
| value borrowed here after partial move
|
= note: partial move occurs because value has type `U`, which does not implement the `Copy` trait
error: aborting due to 36 previous errors
For more information about this error, try `rustc --explain E0382`.

13
src/test/ui/pattern/bindings-after-at/borrowck-pat-ref-mut-and-ref.rs
View File

@ -30,6 +30,7 @@ fn main() {
fn f4_also_moved(ref a @ ref mut b @ c: U) {}
//~^ ERROR cannot borrow value as mutable because it is also borrowed as immutable
//~| ERROR cannot move out of value because it is borrowed
//~| ERROR borrow of moved value
let ref mut a @ (ref b @ ref mut c) = u(); // sub-in-sub
//~^ ERROR cannot borrow value as mutable more than once at a time
@ -46,12 +47,12 @@ fn main() {
let ref mut a @ ref b = u();
//~^ ERROR cannot borrow value as immutable because it is also borrowed as mutable
//~| ERROR cannot borrow value as immutable because it is also borrowed as mutable
//~| ERROR cannot borrow value as mutable because it is also borrowed as immutable
*a = u();
drop(b);
let ref a @ ref mut b = u();
//~^ ERROR cannot borrow value as mutable because it is also borrowed as immutable
//~| ERROR cannot borrow value as mutable because it is also borrowed as immutable
//~| ERROR cannot borrow value as immutable because it is also borrowed as mutable
*b = u();
drop(a);
@ -117,20 +118,20 @@ fn main() {
let ref a @ (ref mut b, ref mut c) = (U, U);
//~^ ERROR cannot borrow value as mutable because it is also borrowed as immutable
//~| ERROR cannot borrow value as immutable because it is also borrowed as mutable
*b = U;
*c = U;
let ref a @ (ref mut b, ref mut c) = (U, U);
//~^ ERROR cannot borrow value as mutable because it is also borrowed as immutable
//~| ERROR cannot borrow value as mutable because it is also borrowed as immutable
//~| ERROR cannot borrow value as mutable because it is also borrowed as immutable
//~| ERROR cannot borrow value as immutable because it is also borrowed as mutable
*b = U;
drop(a);
let ref a @ (ref mut b, ref mut c) = (U, U);
//~^ ERROR cannot borrow value as mutable because it is also borrowed as immutable
//~^ ERROR cannot borrow value as immutable because it is also borrowed as mutable
*b = U; //~| ERROR cannot borrow value as mutable because it is also borrowed as immutable
*c = U; //~| ERROR cannot borrow value as mutable because it is also borrowed as immutable
*c = U;
drop(a);
let ref mut a @ (ref b, ref c) = (U, U);
//~^ ERROR cannot borrow value as immutable because it is also borrowed as mutable

150
src/test/ui/pattern/bindings-after-at/borrowck-pat-ref-mut-and-ref.stderr
View File

@ -8,7 +8,7 @@ LL | ref mut z @ &mut Some(ref a) => {
| mutable borrow, by `z`, occurs here
error: cannot borrow value as mutable more than once at a time
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:34:9
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:35:9
|
LL | let ref mut a @ (ref b @ ref mut c) = u(); // sub-in-sub
| ---------^^^^-----------------^
@ -18,7 +18,7 @@ LL | let ref mut a @ (ref b @ ref mut c) = u(); // sub-in-sub
| first mutable borrow, by `a`, occurs here
error: cannot borrow value as mutable because it is also borrowed as immutable
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:34:22
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:35:22
|
LL | let ref mut a @ (ref b @ ref mut c) = u(); // sub-in-sub
| -----^^^---------
@ -27,7 +27,7 @@ LL | let ref mut a @ (ref b @ ref mut c) = u(); // sub-in-sub
| immutable borrow, by `b`, occurs here
error: cannot borrow value as mutable because it is also borrowed as immutable
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:38:9
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:39:9
|
LL | let ref a @ ref mut b = U;
| -----^^^---------
@ -36,7 +36,7 @@ LL | let ref a @ ref mut b = U;
| immutable borrow, by `a`, occurs here
error: cannot borrow value as immutable because it is also borrowed as mutable
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:40:9
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:41:9
|
LL | let ref mut a @ ref b = U;
| ---------^^^-----
@ -45,7 +45,7 @@ LL | let ref mut a @ ref b = U;
| mutable borrow, by `a`, occurs here
error: cannot borrow value as mutable because it is also borrowed as immutable
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:42:9
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:43:9
|
LL | let ref a @ (ref mut b, ref mut c) = (U, U);
| -----^^^^---------^^---------^
@ -55,7 +55,7 @@ LL | let ref a @ (ref mut b, ref mut c) = (U, U);
| immutable borrow, by `a`, occurs here
error: cannot borrow value as immutable because it is also borrowed as mutable
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:44:9
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:45:9
|
LL | let ref mut a @ (ref b, ref c) = (U, U);
| ---------^^^^-----^^-----^
@ -65,7 +65,7 @@ LL | let ref mut a @ (ref b, ref c) = (U, U);
| mutable borrow, by `a`, occurs here
error: cannot borrow value as immutable because it is also borrowed as mutable
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:47:9
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:48:9
|
LL | let ref mut a @ ref b = u();
| ---------^^^-----
@ -74,7 +74,7 @@ LL | let ref mut a @ ref b = u();
| mutable borrow, by `a`, occurs here
error: cannot borrow value as mutable because it is also borrowed as immutable
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:52:9
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:53:9
|
LL | let ref a @ ref mut b = u();
| -----^^^---------
@ -83,7 +83,7 @@ LL | let ref a @ ref mut b = u();
| immutable borrow, by `a`, occurs here
error: cannot borrow value as immutable because it is also borrowed as mutable
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:58:9
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:59:9
|
LL | let ref mut a @ ref b = U;
| ---------^^^-----
@ -92,7 +92,7 @@ LL | let ref mut a @ ref b = U;
| mutable borrow, by `a`, occurs here
error: cannot borrow value as mutable because it is also borrowed as immutable
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:62:9
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:63:9
|
LL | let ref a @ ref mut b = U;
| -----^^^---------
@ -101,7 +101,7 @@ LL | let ref a @ ref mut b = U;
| immutable borrow, by `a`, occurs here
error: cannot borrow value as immutable because it is also borrowed as mutable
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:68:9
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:69:9
|
LL | ref mut a @ Ok(ref b) | ref mut a @ Err(ref b) => {
| ---------^^^^^^-----^
@ -110,7 +110,7 @@ LL | ref mut a @ Ok(ref b) | ref mut a @ Err(ref b) => {
| mutable borrow, by `a`, occurs here
error: cannot borrow value as immutable because it is also borrowed as mutable
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:68:33
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:69:33
|
LL | ref mut a @ Ok(ref b) | ref mut a @ Err(ref b) => {
| ---------^^^^^^^-----^
@ -119,7 +119,7 @@ LL | ref mut a @ Ok(ref b) | ref mut a @ Err(ref b) => {
| mutable borrow, by `a`, occurs here
error: cannot borrow value as mutable because it is also borrowed as immutable
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:77:9
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:78:9
|
LL | ref a @ Ok(ref mut b) | ref a @ Err(ref mut b) => {
| -----^^^^^^---------^
@ -128,7 +128,7 @@ LL | ref a @ Ok(ref mut b) | ref a @ Err(ref mut b) => {
| immutable borrow, by `a`, occurs here
error: cannot borrow value as mutable because it is also borrowed as immutable
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:77:33
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:78:33
|
LL | ref a @ Ok(ref mut b) | ref a @ Err(ref mut b) => {
| -----^^^^^^^---------^
@ -137,7 +137,7 @@ LL | ref a @ Ok(ref mut b) | ref a @ Err(ref mut b) => {
| immutable borrow, by `a`, occurs here
error: cannot borrow value as mutable because it is also borrowed as immutable
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:88:9
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:89:9
|
LL | ref a @ Ok(ref mut b) | ref a @ Err(ref mut b) if { *b = U; false } => {}
| -----^^^^^^---------^
@ -146,7 +146,7 @@ LL | ref a @ Ok(ref mut b) | ref a @ Err(ref mut b) if { *b = U; false }
| immutable borrow, by `a`, occurs here
error: cannot borrow value as mutable because it is also borrowed as immutable
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:88:33
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:89:33
|
LL | ref a @ Ok(ref mut b) | ref a @ Err(ref mut b) if { *b = U; false } => {}
| -----^^^^^^^---------^
@ -155,7 +155,7 @@ LL | ref a @ Ok(ref mut b) | ref a @ Err(ref mut b) if { *b = U; false }
| immutable borrow, by `a`, occurs here
error: cannot borrow value as immutable because it is also borrowed as mutable
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:95:9
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:96:9
|
LL | ref mut a @ Ok(ref b) | ref mut a @ Err(ref b) if { *a = Err(U); false } => {}
| ---------^^^^^^-----^
@ -164,7 +164,7 @@ LL | ref mut a @ Ok(ref b) | ref mut a @ Err(ref b) if { *a = Err(U); fa
| mutable borrow, by `a`, occurs here
error: cannot borrow value as immutable because it is also borrowed as mutable
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:95:33
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:96:33
|
LL | ref mut a @ Ok(ref b) | ref mut a @ Err(ref b) if { *a = Err(U); false } => {}
| ---------^^^^^^^-----^
@ -173,7 +173,7 @@ LL | ref mut a @ Ok(ref b) | ref mut a @ Err(ref b) if { *a = Err(U); fa
| mutable borrow, by `a`, occurs here
error: cannot borrow value as mutable because it is also borrowed as immutable
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:102:9
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:103:9
|
LL | ref a @ Ok(ref mut b) | ref a @ Err(ref mut b) if { drop(b); false } => {}
| -----^^^^^^---------^
@ -182,7 +182,7 @@ LL | ref a @ Ok(ref mut b) | ref a @ Err(ref mut b) if { drop(b); false
| immutable borrow, by `a`, occurs here
error: cannot borrow value as mutable because it is also borrowed as immutable
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:102:33
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:103:33
|
LL | ref a @ Ok(ref mut b) | ref a @ Err(ref mut b) if { drop(b); false } => {}
| -----^^^^^^^---------^
@ -191,7 +191,7 @@ LL | ref a @ Ok(ref mut b) | ref a @ Err(ref mut b) if { drop(b); false
| immutable borrow, by `a`, occurs here
error: cannot borrow value as immutable because it is also borrowed as mutable
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:110:9
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:111:9
|
LL | ref mut a @ Ok(ref b) | ref mut a @ Err(ref b) if { drop(a); false } => {}
| ---------^^^^^^-----^
@ -200,7 +200,7 @@ LL | ref mut a @ Ok(ref b) | ref mut a @ Err(ref b) if { drop(a); false
| mutable borrow, by `a`, occurs here
error: cannot borrow value as immutable because it is also borrowed as mutable
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:110:33
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:111:33
|
LL | ref mut a @ Ok(ref b) | ref mut a @ Err(ref b) if { drop(a); false } => {}
| ---------^^^^^^^-----^
@ -209,7 +209,7 @@ LL | ref mut a @ Ok(ref b) | ref mut a @ Err(ref b) if { drop(a); false
| mutable borrow, by `a`, occurs here
error: cannot borrow value as mutable because it is also borrowed as immutable
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:118:9
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:119:9
|
LL | let ref a @ (ref mut b, ref mut c) = (U, U);
| -----^^^^---------^^---------^
@ -219,7 +219,7 @@ LL | let ref a @ (ref mut b, ref mut c) = (U, U);
| immutable borrow, by `a`, occurs here
error: cannot borrow value as mutable because it is also borrowed as immutable
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:123:9
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:125:9
|
LL | let ref a @ (ref mut b, ref mut c) = (U, U);
| -----^^^^---------^^---------^
@ -229,7 +229,7 @@ LL | let ref a @ (ref mut b, ref mut c) = (U, U);
| immutable borrow, by `a`, occurs here
error: cannot borrow value as mutable because it is also borrowed as immutable
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:130:9
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:131:9
|
LL | let ref a @ (ref mut b, ref mut c) = (U, U);
| -----^^^^---------^^---------^
@ -239,7 +239,7 @@ LL | let ref a @ (ref mut b, ref mut c) = (U, U);
| immutable borrow, by `a`, occurs here
error: cannot borrow value as immutable because it is also borrowed as mutable
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:135:9
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:136:9
|
LL | let ref mut a @ (ref b, ref c) = (U, U);
| ---------^^^^-----^^-----^
@ -306,32 +306,32 @@ LL | ref mut z @ &mut Some(ref a) => {
LL | **z = None;
| ---------- mutable borrow later used here
error[E0502]: cannot borrow value as immutable because it is also borrowed as mutable
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:47:21
error[E0502]: cannot borrow value as mutable because it is also borrowed as immutable
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:48:9
|
LL | let ref mut a @ ref b = u();
| ------------^^^^^
| ^^^^^^^^^^^^-----
| | |
| | immutable borrow occurs here
| mutable borrow occurs here
...
LL | *a = u();
| -------- mutable borrow later used here
LL | drop(b);
| - immutable borrow later used here
error[E0502]: cannot borrow value as mutable because it is also borrowed as immutable
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:52:17
error[E0502]: cannot borrow value as immutable because it is also borrowed as mutable
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:53:9
|
LL | let ref a @ ref mut b = u();
| --------^^^^^^^^^
| ^^^^^^^^---------
| | |
| | mutable borrow occurs here
| immutable borrow occurs here
...
LL | drop(a);
| - immutable borrow later used here
LL | *b = u();
| -------- mutable borrow later used here
error[E0502]: cannot borrow value as mutable because it is also borrowed as immutable
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:77:20
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:78:20
|
LL | ref a @ Ok(ref mut b) | ref a @ Err(ref mut b) => {
| -----------^^^^^^^^^-
@ -343,7 +343,7 @@ LL | drop(a);
| - immutable borrow later used here
error[E0502]: cannot borrow value as mutable because it is also borrowed as immutable
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:77:45
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:78:45
|
LL | ref a @ Ok(ref mut b) | ref a @ Err(ref mut b) => {
| ------------^^^^^^^^^-
@ -355,7 +355,7 @@ LL | drop(a);
| - immutable borrow later used here
error[E0594]: cannot assign to `*b`, as it is immutable for the pattern guard
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:88:61
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:89:61
|
LL | ref a @ Ok(ref mut b) | ref a @ Err(ref mut b) if { *b = U; false } => {}
| ^^^^^^ cannot assign
@ -363,7 +363,7 @@ LL | ref a @ Ok(ref mut b) | ref a @ Err(ref mut b) if { *b = U; false }
= note: variables bound in patterns are immutable until the end of the pattern guard
error[E0594]: cannot assign to `*a`, as it is immutable for the pattern guard
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:95:61
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:96:61
|
LL | ref mut a @ Ok(ref b) | ref mut a @ Err(ref b) if { *a = Err(U); false } => {}
| ^^^^^^^^^^^ cannot assign
@ -371,7 +371,7 @@ LL | ref mut a @ Ok(ref b) | ref mut a @ Err(ref b) if { *a = Err(U); fa
= note: variables bound in patterns are immutable until the end of the pattern guard
error[E0507]: cannot move out of `b` in pattern guard
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:102:66
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:103:66
|
LL | ref a @ Ok(ref mut b) | ref a @ Err(ref mut b) if { drop(b); false } => {}
| ^ move occurs because `b` has type `&mut U`, which does not implement the `Copy` trait
@ -379,7 +379,7 @@ LL | ref a @ Ok(ref mut b) | ref a @ Err(ref mut b) if { drop(b); false
= note: variables bound in patterns cannot be moved from until after the end of the pattern guard
error[E0507]: cannot move out of `b` in pattern guard
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:102:66
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:103:66
|
LL | ref a @ Ok(ref mut b) | ref a @ Err(ref mut b) if { drop(b); false } => {}
| ^ move occurs because `b` has type `&mut U`, which does not implement the `Copy` trait
@ -387,7 +387,7 @@ LL | ref a @ Ok(ref mut b) | ref a @ Err(ref mut b) if { drop(b); false
= note: variables bound in patterns cannot be moved from until after the end of the pattern guard
error[E0507]: cannot move out of `a` in pattern guard
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:110:66
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:111:66
|
LL | ref mut a @ Ok(ref b) | ref mut a @ Err(ref b) if { drop(a); false } => {}
| ^ move occurs because `a` has type `&mut std::result::Result<U, U>`, which does not implement the `Copy` trait
@ -395,62 +395,60 @@ LL | ref mut a @ Ok(ref b) | ref mut a @ Err(ref b) if { drop(a); false
= note: variables bound in patterns cannot be moved from until after the end of the pattern guard
error[E0507]: cannot move out of `a` in pattern guard
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:110:66
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:111:66
|
LL | ref mut a @ Ok(ref b) | ref mut a @ Err(ref b) if { drop(a); false } => {}
| ^ move occurs because `a` has type `&mut std::result::Result<U, U>`, which does not implement the `Copy` trait
|
= note: variables bound in patterns cannot be moved from until after the end of the pattern guard
error[E0502]: cannot borrow value as mutable because it is also borrowed as immutable
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:123:18
error[E0502]: cannot borrow value as immutable because it is also borrowed as mutable
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:119:9
|
LL | let ref a @ (ref mut b, ref mut c) = (U, U);
| ---------^^^^^^^^^------------
| ^^^^^^^^^---------^^^^^^^^^^^^
| | |
| | mutable borrow occurs here
| immutable borrow occurs here
...
LL | drop(a);
| - immutable borrow later used here
LL | *b = U;
| ------ mutable borrow later used here
error[E0502]: cannot borrow value as mutable because it is also borrowed as immutable
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:123:29
error[E0502]: cannot borrow value as immutable because it is also borrowed as mutable
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:125:9
|
LL | let ref a @ (ref mut b, ref mut c) = (U, U);
| --------------------^^^^^^^^^-
| | |
| | mutable borrow occurs here
| immutable borrow occurs here
...
LL | drop(a);
| - immutable borrow later used here
error[E0502]: cannot borrow value as mutable because it is also borrowed as immutable
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:130:18
|
LL | let ref a @ (ref mut b, ref mut c) = (U, U);
| ---------^^^^^^^^^------------
| ^^^^^^^^^---------^^^^^^^^^^^^
| | |
| | mutable borrow occurs here
| immutable borrow occurs here
...
LL | drop(a);
| - immutable borrow later used here
LL | *b = U;
| ------ mutable borrow later used here
error[E0502]: cannot borrow value as mutable because it is also borrowed as immutable
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:130:29
error[E0502]: cannot borrow value as immutable because it is also borrowed as mutable
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:131:9
|
LL | let ref a @ (ref mut b, ref mut c) = (U, U);
| --------------------^^^^^^^^^-
| | |
| | mutable borrow occurs here
| ^^^^^^^^^---------^^^^^^^^^^^^
| | |
| | mutable borrow occurs here
| immutable borrow occurs here
...
LL | drop(a);
| - immutable borrow later used here
LL |
LL | *b = U;
| ------ mutable borrow later used here
error[E0382]: borrow of moved value
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:30:30
|
LL | fn f4_also_moved(ref a @ ref mut b @ c: U) {}
| --------^^^^^^^^^^^^-
| | | |
| | | value moved here
| | value borrowed here after move
| move occurs because value has type `U`, which does not implement the `Copy` trait
error: aborting due to 47 previous errors
Some errors have detailed explanations: E0502, E0507, E0594.
For more information about an error, try `rustc --explain E0502`.
Some errors have detailed explanations: E0382, E0502, E0507, E0594.
For more information about an error, try `rustc --explain E0382`.

9
src/test/ui/pattern/bindings-after-at/borrowck-pat-ref-mut-twice.rs
View File

@ -23,23 +23,24 @@ fn main() {
fn f4_also_moved(ref mut a @ ref mut b @ c: U) {}
//~^ ERROR cannot borrow value as mutable more than once at a time
//~| ERROR cannot move out of value because it is borrowed
//~| ERROR borrow of moved value
let ref mut a @ ref mut b = U;
//~^ ERROR cannot borrow value as mutable more than once at a time
//~| ERROR cannot borrow value as mutable more than once at a time
drop(a);
let ref mut a @ ref mut b = U;
//~^ ERROR cannot borrow value as mutable more than once at a time
//~| ERROR cannot borrow value as mutable more than once at a time
drop(b);
let ref mut a @ ref mut b = U;
//~^ ERROR cannot borrow value as mutable more than once at a time
let ref mut a @ ref mut b = U;
//~^ ERROR cannot borrow value as mutable more than once at a time
//~| ERROR cannot borrow value as mutable more than once at a time
*a = U;
let ref mut a @ ref mut b = U;
//~^ ERROR cannot borrow value as mutable more than once at a time
//~| ERROR cannot borrow value as mutable more than once at a time
*b = U;
let ref mut a @ (
@ -64,18 +65,14 @@ fn main() {
let a @ (ref mut b, ref mut c) = (U, U);
//~^ ERROR borrow of moved value
//~| ERROR borrow of moved value
let mut val = (U, [U, U]);
let a @ (b, [c, d]) = &mut val; // Same as ^--
//~^ ERROR borrow of moved value
//~| ERROR borrow of moved value
let a @ &mut ref mut b = &mut U;
//~^ ERROR borrow of moved value
//~| ERROR borrow of moved value
let a @ &mut (ref mut b, ref mut c) = &mut (U, U);
//~^ ERROR borrow of moved value
//~| ERROR borrow of moved value
match Ok(U) {
ref mut a @ Ok(ref mut b) | ref mut a @ Err(ref mut b) => {

108
src/test/ui/pattern/bindings-after-at/borrowck-pat-ref-mut-twice.stderr
View File

@ -1,5 +1,5 @@
error: cannot borrow value as mutable more than once at a time
--> $DIR/borrowck-pat-ref-mut-twice.rs:27:9
--> $DIR/borrowck-pat-ref-mut-twice.rs:28:9
|
LL | let ref mut a @ ref mut b = U;
| ---------^^^---------
@ -17,7 +17,7 @@ LL | let ref mut a @ ref mut b = U;
| first mutable borrow, by `a`, occurs here
error: cannot borrow value as mutable more than once at a time
--> $DIR/borrowck-pat-ref-mut-twice.rs:34:9
--> $DIR/borrowck-pat-ref-mut-twice.rs:35:9
|
LL | let ref mut a @ ref mut b = U;
| ---------^^^---------
@ -26,7 +26,7 @@ LL | let ref mut a @ ref mut b = U;
| first mutable borrow, by `a`, occurs here
error: cannot borrow value as mutable more than once at a time
--> $DIR/borrowck-pat-ref-mut-twice.rs:37:9
--> $DIR/borrowck-pat-ref-mut-twice.rs:38:9
|
LL | let ref mut a @ ref mut b = U;
| ---------^^^---------
@ -44,7 +44,7 @@ LL | let ref mut a @ ref mut b = U;
| first mutable borrow, by `a`, occurs here
error: cannot borrow value as mutable more than once at a time
--> $DIR/borrowck-pat-ref-mut-twice.rs:45:9
--> $DIR/borrowck-pat-ref-mut-twice.rs:46:9
|
LL | let ref mut a @ (
| ^--------
@ -66,7 +66,7 @@ LL | | ) = (U, [U, U, U]);
| |_____^
error: cannot borrow value as mutable more than once at a time
--> $DIR/borrowck-pat-ref-mut-twice.rs:55:9
--> $DIR/borrowck-pat-ref-mut-twice.rs:56:9
|
LL | let ref mut a @ (
| ^--------
@ -88,7 +88,7 @@ LL | | ) = (u(), [u(), u(), u()]);
| |_________^
error: borrow of moved value
--> $DIR/borrowck-pat-ref-mut-twice.rs:65:9
--> $DIR/borrowck-pat-ref-mut-twice.rs:66:9
|
LL | let a @ (ref mut b, ref mut c) = (U, U);
| -^^^^---------^^---------^
@ -111,7 +111,7 @@ LL | let a @ (b, [c, d]) = &mut val; // Same as ^--
| move occurs because `a` has type `&mut (U, [U; 2])` which does not implement the `Copy` trait
error: borrow of moved value
--> $DIR/borrowck-pat-ref-mut-twice.rs:73:9
--> $DIR/borrowck-pat-ref-mut-twice.rs:72:9
|
LL | let a @ &mut ref mut b = &mut U;
| -^^^^^^^^---------
@ -121,7 +121,7 @@ LL | let a @ &mut ref mut b = &mut U;
| move occurs because `a` has type `&mut U` which does not implement the `Copy` trait
error: borrow of moved value
--> $DIR/borrowck-pat-ref-mut-twice.rs:76:9
--> $DIR/borrowck-pat-ref-mut-twice.rs:74:9
|
LL | let a @ &mut (ref mut b, ref mut c) = &mut (U, U);
| -^^^^^^^^^---------^^---------^
@ -132,7 +132,7 @@ LL | let a @ &mut (ref mut b, ref mut c) = &mut (U, U);
| move occurs because `a` has type `&mut (U, U)` which does not implement the `Copy` trait
error: cannot borrow value as mutable more than once at a time
--> $DIR/borrowck-pat-ref-mut-twice.rs:81:9
--> $DIR/borrowck-pat-ref-mut-twice.rs:78:9
|
LL | ref mut a @ Ok(ref mut b) | ref mut a @ Err(ref mut b) => {
| ---------^^^^^^---------^
@ -141,7 +141,7 @@ LL | ref mut a @ Ok(ref mut b) | ref mut a @ Err(ref mut b) => {
| first mutable borrow, by `a`, occurs here
error: cannot borrow value as mutable more than once at a time
--> $DIR/borrowck-pat-ref-mut-twice.rs:81:37
--> $DIR/borrowck-pat-ref-mut-twice.rs:78:37
|
LL | ref mut a @ Ok(ref mut b) | ref mut a @ Err(ref mut b) => {
| ---------^^^^^^^---------^
@ -150,7 +150,7 @@ LL | ref mut a @ Ok(ref mut b) | ref mut a @ Err(ref mut b) => {
| first mutable borrow, by `a`, occurs here
error: cannot borrow value as mutable more than once at a time
--> $DIR/borrowck-pat-ref-mut-twice.rs:87:9
--> $DIR/borrowck-pat-ref-mut-twice.rs:84:9
|
LL | ref mut a @ Ok(ref mut b) | ref mut a @ Err(ref mut b) => {
| ---------^^^^^^---------^
@ -159,7 +159,7 @@ LL | ref mut a @ Ok(ref mut b) | ref mut a @ Err(ref mut b) => {
| first mutable borrow, by `a`, occurs here
error: cannot borrow value as mutable more than once at a time
--> $DIR/borrowck-pat-ref-mut-twice.rs:87:37
--> $DIR/borrowck-pat-ref-mut-twice.rs:84:37
|
LL | ref mut a @ Ok(ref mut b) | ref mut a @ Err(ref mut b) => {
| ---------^^^^^^^---------^
@ -168,7 +168,7 @@ LL | ref mut a @ Ok(ref mut b) | ref mut a @ Err(ref mut b) => {
| first mutable borrow, by `a`, occurs here
error: cannot borrow value as mutable more than once at a time
--> $DIR/borrowck-pat-ref-mut-twice.rs:94:9
--> $DIR/borrowck-pat-ref-mut-twice.rs:91:9
|
LL | ref mut a @ Ok(ref mut b) | ref mut a @ Err(ref mut b) => {
| ---------^^^^^^---------^
@ -177,7 +177,7 @@ LL | ref mut a @ Ok(ref mut b) | ref mut a @ Err(ref mut b) => {
| first mutable borrow, by `a`, occurs here
error: cannot borrow value as mutable more than once at a time
--> $DIR/borrowck-pat-ref-mut-twice.rs:94:37
--> $DIR/borrowck-pat-ref-mut-twice.rs:91:37
|
LL | ref mut a @ Ok(ref mut b) | ref mut a @ Err(ref mut b) => {
| ---------^^^^^^^---------^
@ -186,7 +186,7 @@ LL | ref mut a @ Ok(ref mut b) | ref mut a @ Err(ref mut b) => {
| first mutable borrow, by `a`, occurs here
error: cannot borrow value as mutable more than once at a time
--> $DIR/borrowck-pat-ref-mut-twice.rs:106:9
--> $DIR/borrowck-pat-ref-mut-twice.rs:103:9
|
LL | ref mut a @ Ok(ref mut b) | ref mut a @ Err(ref mut b) => {
| ---------^^^^^^---------^
@ -195,7 +195,7 @@ LL | ref mut a @ Ok(ref mut b) | ref mut a @ Err(ref mut b) => {
| first mutable borrow, by `a`, occurs here
error: cannot borrow value as mutable more than once at a time
--> $DIR/borrowck-pat-ref-mut-twice.rs:106:37
--> $DIR/borrowck-pat-ref-mut-twice.rs:103:37
|
LL | ref mut a @ Ok(ref mut b) | ref mut a @ Err(ref mut b) => {
| ---------^^^^^^^---------^
@ -259,67 +259,31 @@ LL | fn f4_also_moved(ref mut a @ ref mut b @ c: U) {}
| value borrowed, by `b`, here
error[E0499]: cannot borrow value as mutable more than once at a time
--> $DIR/borrowck-pat-ref-mut-twice.rs:27:21
--> $DIR/borrowck-pat-ref-mut-twice.rs:31:9
|
LL | let ref mut a @ ref mut b = U;
| ------------^^^^^^^^^
| ^^^^^^^^^^^^---------
| | |
| | second mutable borrow occurs here
| first mutable borrow occurs here
| | first mutable borrow occurs here
| second mutable borrow occurs here
...
LL | drop(a);
LL | drop(b);
| - first borrow later used here
error[E0499]: cannot borrow value as mutable more than once at a time
--> $DIR/borrowck-pat-ref-mut-twice.rs:37:21
--> $DIR/borrowck-pat-ref-mut-twice.rs:41:9
|
LL | let ref mut a @ ref mut b = U;
| ------------^^^^^^^^^
| ^^^^^^^^^^^^---------
| | |
| | second mutable borrow occurs here
| first mutable borrow occurs here
| | first mutable borrow occurs here
| second mutable borrow occurs here
...
LL | *a = U;
LL | *b = U;
| ------ first borrow later used here
error[E0382]: borrow of moved value
--> $DIR/borrowck-pat-ref-mut-twice.rs:65:25
|
LL | let a @ (ref mut b, ref mut c) = (U, U);
| ----------------^^^^^^^^^- ------ move occurs because value has type `(U, U)`, which does not implement the `Copy` trait
| | |
| | value borrowed here after move
| value moved here
error[E0382]: borrow of moved value
--> $DIR/borrowck-pat-ref-mut-twice.rs:69:21
|
LL | let a @ (b, [c, d]) = &mut val; // Same as ^--
| ------------^-- -------- move occurs because value has type `&mut (U, [U; 2])`, which does not implement the `Copy` trait
| | |
| | value borrowed here after move
| value moved here
error[E0382]: borrow of moved value
--> $DIR/borrowck-pat-ref-mut-twice.rs:73:18
|
LL | let a @ &mut ref mut b = &mut U;
| ---------^^^^^^^^^ ------ move occurs because value has type `&mut U`, which does not implement the `Copy` trait
| | |
| | value borrowed here after move
| value moved here
error[E0382]: borrow of moved value
--> $DIR/borrowck-pat-ref-mut-twice.rs:76:30
|
LL | let a @ &mut (ref mut b, ref mut c) = &mut (U, U);
| ---------------------^^^^^^^^^- ----------- move occurs because value has type `&mut (U, U)`, which does not implement the `Copy` trait
| | |
| | value borrowed here after move
| value moved here
error[E0499]: cannot borrow value as mutable more than once at a time
--> $DIR/borrowck-pat-ref-mut-twice.rs:94:24
--> $DIR/borrowck-pat-ref-mut-twice.rs:91:24
|
LL | ref mut a @ Ok(ref mut b) | ref mut a @ Err(ref mut b) => {
| ---------------^^^^^^^^^-
@ -331,7 +295,7 @@ LL | *a = Err(U);
| ----------- first borrow later used here
error[E0499]: cannot borrow value as mutable more than once at a time
--> $DIR/borrowck-pat-ref-mut-twice.rs:94:53
--> $DIR/borrowck-pat-ref-mut-twice.rs:91:53
|
LL | ref mut a @ Ok(ref mut b) | ref mut a @ Err(ref mut b) => {
| ----------------^^^^^^^^^-
@ -343,7 +307,7 @@ LL | *a = Err(U);
| ----------- first borrow later used here
error[E0499]: cannot borrow value as mutable more than once at a time
--> $DIR/borrowck-pat-ref-mut-twice.rs:106:24
--> $DIR/borrowck-pat-ref-mut-twice.rs:103:24
|
LL | ref mut a @ Ok(ref mut b) | ref mut a @ Err(ref mut b) => {
| ---------------^^^^^^^^^-
@ -355,7 +319,7 @@ LL | drop(a);
| - first borrow later used here
error[E0499]: cannot borrow value as mutable more than once at a time
--> $DIR/borrowck-pat-ref-mut-twice.rs:106:53
--> $DIR/borrowck-pat-ref-mut-twice.rs:103:53
|
LL | ref mut a @ Ok(ref mut b) | ref mut a @ Err(ref mut b) => {
| ----------------^^^^^^^^^-
@ -366,7 +330,17 @@ LL | ref mut a @ Ok(ref mut b) | ref mut a @ Err(ref mut b) => {
LL | drop(a);
| - first borrow later used here
error: aborting due to 34 previous errors
error[E0382]: borrow of moved value
--> $DIR/borrowck-pat-ref-mut-twice.rs:23:34
|
LL | fn f4_also_moved(ref mut a @ ref mut b @ c: U) {}
| ------------^^^^^^^^^^^^-
| | | |
| | | value moved here
| | value borrowed here after move
| move occurs because value has type `U`, which does not implement the `Copy` trait
error: aborting due to 31 previous errors
Some errors have detailed explanations: E0382, E0499.
For more information about an error, try `rustc --explain E0382`.

5
src/test/ui/pattern/bindings-after-at/copy-and-move-mixed.rs
View File

@ -8,10 +8,9 @@ struct C;
struct NC<A, B>(A, B);
fn main() {
// this compiles
let a @ NC(b, c) = NC(C, C);
//~^ ERROR use of moved value
let a @ NC(b, c @ NC(d, e)) = NC(C, NC(C, C));
//~^ ERROR use of moved value
//~| ERROR use of moved value
//~^ ERROR use of partially moved value
}

32
src/test/ui/pattern/bindings-after-at/copy-and-move-mixed.stderr
View File

@ -1,32 +1,14 @@
error[E0382]: use of moved value
--> $DIR/copy-and-move-mixed.rs:11:19
|
LL | let a @ NC(b, c) = NC(C, C);
| ----------^- -------- move occurs because value has type `NC<C, C>`, which does not implement the `Copy` trait
| | |
| | value used here after move
| value moved here
error[E0382]: use of moved value
--> $DIR/copy-and-move-mixed.rs:14:19
error[E0382]: use of partially moved value
--> $DIR/copy-and-move-mixed.rs:14:9
|
LL | let a @ NC(b, c @ NC(d, e)) = NC(C, NC(C, C));
| ----------^^^^^^^^^^^^- --------------- move occurs because value has type `NC<C, NC<C, C>>`, which does not implement the `Copy` trait
| ^^^^^^^^^^------------^
| | |
| | value used here after move
| value moved here
error[E0382]: use of moved value
--> $DIR/copy-and-move-mixed.rs:14:29
| | value partially moved here
| value used here after partial move
|
LL | let a @ NC(b, c @ NC(d, e)) = NC(C, NC(C, C));
| ----------^-
| | |
| | value used here after move
| value moved here
|
= note: move occurs because value has type `NC<C, C>`, which does not implement the `Copy` trait
= note: partial move occurs because value has type `NC<C, C>`, which does not implement the `Copy` trait
error: aborting due to 3 previous errors
error: aborting due to previous error
For more information about this error, try `rustc --explain E0382`.

2
src/test/ui/pattern/bindings-after-at/default-binding-modes-both-sides-independent.rs
View File

@ -28,7 +28,7 @@ fn main() {
let _a: &NotCopy = a;
let _b: NotCopy = b;
let ref mut a @ b = NotCopy; //~ ERROR cannot move out of value because it is borrowed
//~^ ERROR cannot move out of value because it is borrowed
//~^ ERROR borrow of moved value
let _a: &NotCopy = a;
let _b: NotCopy = b;
match Ok(NotCopy) {

15
src/test/ui/pattern/bindings-after-at/default-binding-modes-both-sides-independent.stderr
View File

@ -44,18 +44,15 @@ LL | ref a @ b => {
| | value moved into `b` here
| value borrowed, by `a`, here
error[E0505]: cannot move out of value because it is borrowed
--> $DIR/default-binding-modes-both-sides-independent.rs:30:21
error[E0382]: borrow of moved value
--> $DIR/default-binding-modes-both-sides-independent.rs:30:9
|
LL | let ref mut a @ b = NotCopy;
| ------------^
| ^^^^^^^^^^^^- ------- move occurs because value has type `NotCopy`, which does not implement the `Copy` trait
| | |
| | move out of value occurs here
| borrow of value occurs here
LL |
LL | let _a: &NotCopy = a;
| - borrow later used here
| | value moved here
| value borrowed here after move
error: aborting due to 6 previous errors
For more information about this error, try `rustc --explain E0505`.
For more information about this error, try `rustc --explain E0382`.