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bindings_after_at: harden tests wrt. contexts & slice_patterns

This commit is contained in:
Mazdak Farrokhzad 2019-12-15 03:50:55 +01:00
parent 0034e6199e
commit 6fa8f4a57b
14 changed files with 506 additions and 137 deletions
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17
src/test/ui/pattern/bindings-after-at/borrowck-move-and-move.rs
View File

@ -2,6 +2,7 @@
#![feature(bindings_after_at)]
//~^ WARN the feature `bindings_after_at` is incomplete and may cause the compiler to crash
#![feature(slice_patterns)]
fn main() {
struct U; // Not copy!
@ -28,4 +29,20 @@ fn main() {
//~| ERROR cannot bind by-move with sub-bindings
//~| ERROR use of moved value
}
fn fun(a @ b: U) {}
//~^ ERROR cannot bind by-move with sub-bindings
//~| ERROR use of moved value
match [u(), u(), u(), u()] {
xs @ [a, .., b] => {}
//~^ ERROR cannot bind by-move with sub-bindings
//~| ERROR use of moved value
}
match [u(), u(), u(), u()] {
xs @ [_, ys @ .., _] => {}
//~^ ERROR cannot bind by-move with sub-bindings
//~| ERROR use of moved value
}
}

72
src/test/ui/pattern/bindings-after-at/borrowck-move-and-move.stderr
View File

@ -7,37 +7,55 @@ LL | #![feature(bindings_after_at)]
= note: `#[warn(incomplete_features)]` on by default
error[E0007]: cannot bind by-move with sub-bindings
--> $DIR/borrowck-move-and-move.rs:12:9
--> $DIR/borrowck-move-and-move.rs:13:9
|
LL | let a @ b = U;
| ^^^^^ binds an already bound by-move value by moving it
error[E0007]: cannot bind by-move with sub-bindings
--> $DIR/borrowck-move-and-move.rs:16:9
--> $DIR/borrowck-move-and-move.rs:17:9
|
LL | let a @ (b, c) = (U, U);
| ^^^^^^^^^^ binds an already bound by-move value by moving it
error[E0007]: cannot bind by-move with sub-bindings
--> $DIR/borrowck-move-and-move.rs:20:9
--> $DIR/borrowck-move-and-move.rs:21:9
|
LL | let a @ (b, c) = (u(), u());
| ^^^^^^^^^^ binds an already bound by-move value by moving it
error[E0007]: cannot bind by-move with sub-bindings
--> $DIR/borrowck-move-and-move.rs:25:9
--> $DIR/borrowck-move-and-move.rs:26:9
|
LL | a @ Ok(b) | a @ Err(b) => {}
| ^^^^^^^^^ binds an already bound by-move value by moving it
error[E0007]: cannot bind by-move with sub-bindings
--> $DIR/borrowck-move-and-move.rs:25:21
--> $DIR/borrowck-move-and-move.rs:26:21
|
LL | a @ Ok(b) | a @ Err(b) => {}
| ^^^^^^^^^^ binds an already bound by-move value by moving it
error[E0007]: cannot bind by-move with sub-bindings
--> $DIR/borrowck-move-and-move.rs:38:9
|
LL | xs @ [a, .., b] => {}
| ^^^^^^^^^^^^^^^ binds an already bound by-move value by moving it
error[E0007]: cannot bind by-move with sub-bindings
--> $DIR/borrowck-move-and-move.rs:44:9
|
LL | xs @ [_, ys @ .., _] => {}
| ^^^^^^^^^^^^^^^^^^^^ binds an already bound by-move value by moving it
error[E0007]: cannot bind by-move with sub-bindings
--> $DIR/borrowck-move-and-move.rs:33:12
|
LL | fn fun(a @ b: U) {}
| ^^^^^ binds an already bound by-move value by moving it
error[E0382]: use of moved value
--> $DIR/borrowck-move-and-move.rs:12:13
--> $DIR/borrowck-move-and-move.rs:13:13
|
LL | let a @ b = U;
| ----^ - move occurs because value has type `main::U`, which does not implement the `Copy` trait
@ -46,7 +64,7 @@ LL | let a @ b = U;
| value moved here
error[E0382]: use of moved value
--> $DIR/borrowck-move-and-move.rs:16:17
--> $DIR/borrowck-move-and-move.rs:17:17
|
LL | let a @ (b, c) = (U, U);
| --------^- ------ move occurs because value has type `(main::U, main::U)`, which does not implement the `Copy` trait
@ -55,7 +73,7 @@ LL | let a @ (b, c) = (U, U);
| value moved here
error[E0382]: use of moved value
--> $DIR/borrowck-move-and-move.rs:20:17
--> $DIR/borrowck-move-and-move.rs:21:17
|
LL | let a @ (b, c) = (u(), u());
| --------^- ---------- move occurs because value has type `(main::U, main::U)`, which does not implement the `Copy` trait
@ -64,7 +82,7 @@ LL | let a @ (b, c) = (u(), u());
| value moved here
error[E0382]: use of moved value
--> $DIR/borrowck-move-and-move.rs:25:16
--> $DIR/borrowck-move-and-move.rs:26:16
|
LL | match Ok(U) {
| ----- move occurs because value has type `std::result::Result<main::U, main::U>`, which does not implement the `Copy` trait
@ -75,7 +93,7 @@ LL | a @ Ok(b) | a @ Err(b) => {}
| value moved here
error[E0382]: use of moved value
--> $DIR/borrowck-move-and-move.rs:25:29
--> $DIR/borrowck-move-and-move.rs:26:29
|
LL | match Ok(U) {
| ----- move occurs because value has type `std::result::Result<main::U, main::U>`, which does not implement the `Copy` trait
@ -85,7 +103,39 @@ LL | a @ Ok(b) | a @ Err(b) => {}
| | value used here after move
| value moved here
error: aborting due to 10 previous errors
error[E0382]: use of moved value
--> $DIR/borrowck-move-and-move.rs:38:22
|
LL | match [u(), u(), u(), u()] {
| -------------------- move occurs because value has type `[main::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:44:18
|
LL | match [u(), u(), u(), u()] {
| -------------------- move occurs because value has type `[main::U; 4]`, which does not implement the `Copy` trait
LL | xs @ [_, ys @ .., _] => {}
| ---------^^^^^^^----
| | |
| | value used here after move
| value moved here
error[E0382]: use of moved value
--> $DIR/borrowck-move-and-move.rs:33:16
|
LL | fn fun(a @ b: U) {}
| ----^
| | |
| | value used here after move
| value moved here
| move occurs because value has type `main::U`, which does not implement the `Copy` trait
error: aborting due to 16 previous errors
Some errors have detailed explanations: E0007, E0382.
For more information about an error, try `rustc --explain E0007`.

59
src/test/ui/pattern/bindings-after-at/borrowck-pat-at-and-box.rs
View File

@ -9,6 +9,10 @@ struct C;
fn c() -> C { C }
struct NC;
fn nc() -> NC { NC }
fn main() {
let a @ box &b = Box::new(&C);
//~^ ERROR cannot bind by-move with sub-bindings
@ -18,6 +22,18 @@ fn main() {
//~^ ERROR cannot bind by-move with sub-bindings
//~| ERROR use of moved value
fn f1(a @ box &b: Box<&C>) {}
//~^ ERROR cannot bind by-move with sub-bindings
//~| ERROR use of moved value
fn f2(a @ box b: Box<C>) {}
//~^ ERROR cannot bind by-move with sub-bindings
//~| ERROR use of moved value
match Box::new(C) { a @ box b => {} }
//~^ ERROR cannot bind by-move with sub-bindings
//~| ERROR use of moved value
let ref a @ box b = Box::new(C); // OK; the type is `Copy`.
drop(b);
drop(b);
@ -28,9 +44,18 @@ fn main() {
drop(b);
drop(a);
struct NC;
fn nc() -> NC { NC }
fn f3(ref a @ box b: Box<C>) { // OK; the type is `Copy`.
drop(b);
drop(b);
drop(a);
}
match Box::new(c()) {
ref a @ box b => { // OK; the type is `Copy`.
drop(b);
drop(b);
drop(a);
}
}
let ref a @ box b = Box::new(NC); //~ ERROR cannot bind by-move and by-ref in the same pattern
@ -38,6 +63,18 @@ fn main() {
drop(a);
drop(b);
fn f4(ref a @ box ref b: Box<NC>) { // OK.
drop(a);
drop(b)
}
match Box::new(nc()) {
ref a @ box ref b => { // OK.
drop(a);
drop(b);
}
}
let ref a @ box ref mut b = Box::new(nc());
//~^ ERROR cannot borrow `a` as mutable because it is also borrowed as immutable
let ref a @ box ref mut b = Box::new(NC);
@ -56,4 +93,20 @@ fn main() {
//~| ERROR cannot borrow `_` as immutable because it is also borrowed as mutable
*a = Box::new(NC);
drop(b);
fn f5(ref mut a @ box ref b: Box<NC>) {
//~^ ERROR cannot borrow `a` as immutable because it is also borrowed as mutable
//~| ERROR cannot borrow `_` as immutable because it is also borrowed as mutable
*a = Box::new(NC);
drop(b);
}
match Box::new(nc()) {
ref mut a @ box ref b => {
//~^ ERROR cannot borrow `a` as immutable because it is also borrowed as mutable
//~| ERROR cannot borrow `_` as immutable because it is also borrowed as mutable
*a = Box::new(NC);
drop(b);
}
}
}

116
src/test/ui/pattern/bindings-after-at/borrowck-pat-at-and-box.stderr
View File

@ -7,19 +7,25 @@ LL | #![feature(bindings_after_at)]
= note: `#[warn(incomplete_features)]` on by default
error[E0007]: cannot bind by-move with sub-bindings
--> $DIR/borrowck-pat-at-and-box.rs:13:9
--> $DIR/borrowck-pat-at-and-box.rs:17:9
|
LL | let a @ box &b = Box::new(&C);
| ^^^^^^^^^^ binds an already bound by-move value by moving it
error[E0007]: cannot bind by-move with sub-bindings
--> $DIR/borrowck-pat-at-and-box.rs:17:9
--> $DIR/borrowck-pat-at-and-box.rs:21:9
|
LL | let a @ box b = Box::new(C);
| ^^^^^^^^^ binds an already bound by-move value by moving it
error[E0007]: cannot bind by-move with sub-bindings
--> $DIR/borrowck-pat-at-and-box.rs:33:25
|
LL | match Box::new(C) { a @ box b => {} }
| ^^^^^^^^^ binds an already bound by-move value by moving it
error[E0009]: cannot bind by-move and by-ref in the same pattern
--> $DIR/borrowck-pat-at-and-box.rs:35:21
--> $DIR/borrowck-pat-at-and-box.rs:60:21
|
LL | let ref a @ box b = Box::new(NC);
| ------------^
@ -28,7 +34,7 @@ LL | let ref a @ box b = Box::new(NC);
| by-ref pattern here
error: cannot borrow `a` as mutable because it is also borrowed as immutable
--> $DIR/borrowck-pat-at-and-box.rs:41:9
--> $DIR/borrowck-pat-at-and-box.rs:78:9
|
LL | let ref a @ box ref mut b = Box::new(nc());
| -----^^^^^^^---------
@ -37,7 +43,7 @@ LL | let ref a @ box ref mut b = Box::new(nc());
| immutable borrow occurs here
error: cannot borrow `a` as mutable because it is also borrowed as immutable
--> $DIR/borrowck-pat-at-and-box.rs:43:9
--> $DIR/borrowck-pat-at-and-box.rs:80:9
|
LL | let ref a @ box ref mut b = Box::new(NC);
| -----^^^^^^^---------
@ -46,7 +52,7 @@ LL | let ref a @ box ref mut b = Box::new(NC);
| immutable borrow occurs here
error: cannot borrow `a` 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:82:9
|
LL | let ref a @ box ref mut b = Box::new(NC);
| -----^^^^^^^---------
@ -55,7 +61,7 @@ LL | let ref a @ box ref mut b = Box::new(NC);
| immutable borrow occurs here
error: cannot borrow `a` as mutable because it is also borrowed as immutable
--> $DIR/borrowck-pat-at-and-box.rs:48:9
--> $DIR/borrowck-pat-at-and-box.rs:85:9
|
LL | let ref a @ box ref mut b = Box::new(NC);
| -----^^^^^^^---------
@ -64,7 +70,7 @@ LL | let ref a @ box ref mut b = Box::new(NC);
| immutable borrow occurs here
error: cannot borrow `a` as immutable because it is also borrowed as mutable
--> $DIR/borrowck-pat-at-and-box.rs:54:9
--> $DIR/borrowck-pat-at-and-box.rs:91:9
|
LL | let ref mut a @ box ref b = Box::new(NC);
| ---------^^^^^^^-----
@ -72,8 +78,38 @@ LL | let ref mut a @ box ref b = Box::new(NC);
| | immutable borrow occurs here
| mutable borrow occurs here
error: cannot borrow `a` as immutable because it is also borrowed as mutable
--> $DIR/borrowck-pat-at-and-box.rs:105:9
|
LL | ref mut a @ box ref b => {
| ---------^^^^^^^-----
| | |
| | immutable borrow occurs here
| mutable borrow occurs here
error[E0007]: cannot bind by-move with sub-bindings
--> $DIR/borrowck-pat-at-and-box.rs:25:11
|
LL | fn f1(a @ box &b: Box<&C>) {}
| ^^^^^^^^^^ binds an already bound by-move value by moving it
error[E0007]: cannot bind by-move with sub-bindings
--> $DIR/borrowck-pat-at-and-box.rs:29:11
|
LL | fn f2(a @ box b: Box<C>) {}
| ^^^^^^^^^ binds an already bound by-move value by moving it
error: cannot borrow `a` as immutable because it is also borrowed as mutable
--> $DIR/borrowck-pat-at-and-box.rs:97:11
|
LL | fn f5(ref mut a @ box ref b: Box<NC>) {
| ---------^^^^^^^-----
| | |
| | immutable borrow occurs here
| mutable borrow occurs here
error[E0382]: use of moved value
--> $DIR/borrowck-pat-at-and-box.rs:13:18
--> $DIR/borrowck-pat-at-and-box.rs:17:18
|
LL | let a @ box &b = Box::new(&C);
| ---------^ ------------ move occurs because value has type `std::boxed::Box<&C>`, which does not implement the `Copy` trait
@ -82,7 +118,7 @@ LL | let a @ box &b = Box::new(&C);
| value moved here
error[E0382]: use of moved value
--> $DIR/borrowck-pat-at-and-box.rs:17:17
--> $DIR/borrowck-pat-at-and-box.rs:21:17
|
LL | let a @ box b = Box::new(C);
| --------^ ----------- move occurs because value has type `std::boxed::Box<C>`, which does not implement the `Copy` trait
@ -90,8 +126,18 @@ LL | let a @ box b = Box::new(C);
| | value used here after move
| value moved here
error[E0382]: use of moved value
--> $DIR/borrowck-pat-at-and-box.rs:33:33
|
LL | match Box::new(C) { a @ box b => {} }
| ----------- --------^
| | | |
| | | value used here after move
| | value moved here
| move occurs because value has type `std::boxed::Box<C>`, which does not implement the `Copy` trait
error[E0502]: cannot borrow `_` as mutable because it is also borrowed as immutable
--> $DIR/borrowck-pat-at-and-box.rs:48:21
--> $DIR/borrowck-pat-at-and-box.rs:85:21
|
LL | let ref a @ box ref mut b = Box::new(NC);
| ------------^^^^^^^^^
@ -103,7 +149,7 @@ LL | drop(a);
| - immutable borrow later used here
error[E0502]: cannot borrow `_` as immutable because it is also borrowed as mutable
--> $DIR/borrowck-pat-at-and-box.rs:54:25
--> $DIR/borrowck-pat-at-and-box.rs:91:25
|
LL | let ref mut a @ box ref b = Box::new(NC);
| ----------------^^^^^
@ -114,7 +160,51 @@ LL | let ref mut a @ box ref b = Box::new(NC);
LL | *a = Box::new(NC);
| -- mutable borrow later used here
error: aborting due to 12 previous errors
error[E0502]: cannot borrow `_` as immutable because it is also borrowed as mutable
--> $DIR/borrowck-pat-at-and-box.rs:105:25
|
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
error[E0382]: use of moved value
--> $DIR/borrowck-pat-at-and-box.rs:25:20
|
LL | fn f1(a @ box &b: Box<&C>) {}
| ---------^
| | |
| | value used here after move
| value moved here
| move occurs because value has type `std::boxed::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 `std::boxed::Box<C>`, which does not implement the `Copy` trait
error[E0502]: cannot borrow `_` as immutable because it is also borrowed as mutable
--> $DIR/borrowck-pat-at-and-box.rs:97:27
|
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
error: aborting due to 22 previous errors
Some errors have detailed explanations: E0007, E0009, E0382, E0502.
For more information about an error, try `rustc --explain E0007`.

3
src/test/ui/pattern/bindings-after-at/borrowck-pat-by-copy-bindings-in-at.rs
View File

@ -22,9 +22,12 @@ fn main() {
let a @ P(b, P(c, d)) = P(mk_c(), P(C, C));
let a @ [b, c] = [C, C];
let a @ [b, .., c] = [C, mk_c(), C];
let a @ [b, mid @ .., c] = [C, mk_c(), C];
let a @ &(b, c) = &(C, C);
let a @ &(b, &P(c, d)) = &(mk_c(), &P(C, C));
fn foo(a @ [b, mid @ .., c]: [C; 3]) {}
use self::E::*;
match L(C) {
L(a) | R(a) => {

3
src/test/ui/pattern/bindings-after-at/borrowck-pat-ref-both-sides.rs
View File

@ -5,6 +5,7 @@
#![feature(bindings_after_at)]
//~^ WARN the feature `bindings_after_at` is incomplete and may cause the compiler to crash
#![feature(slice_patterns)]
fn main() {
struct U; // Not copy!
@ -27,6 +28,8 @@ fn main() {
let _: &U = c;
let _: &U = d;
fn f1(ref a @ (ref b, [ref c, ref mid @ .., ref d]): (U, [U; 4])) {}
let a @ (b, [c, d]) = &(u(), [u(), u()]);
let _: &(U, [U; 2]) = a;
let _: &U = b;

12
src/test/ui/pattern/bindings-after-at/borrowck-pat-ref-mut-and-ref.rs
View File

@ -1,5 +1,6 @@
#![feature(bindings_after_at)]
//~^ WARN the feature `bindings_after_at` is incomplete and may cause the compiler to crash
#![feature(slice_patterns)]
enum Option<T> {
None,
@ -22,6 +23,17 @@ fn main() {
// Prevent promotion:
fn u() -> U { U }
fn f1(ref a @ ref mut b: U) {}
//~^ ERROR cannot borrow `a` as mutable because it is also borrowed as immutable
fn f2(ref mut a @ ref b: U) {}
//~^ ERROR cannot borrow `a` as immutable because it is also borrowed as mutable
fn f3(ref a @ [ref b, ref mut mid @ .., ref c]: [U; 4]) {}
//~^ ERROR cannot borrow `a` as mutable because it is also borrowed as immutable
let ref mut a @ (ref b @ ref mut c) = u(); // sub-in-sub
//~^ ERROR cannot borrow `a` as mutable more than once at a time
//~| ERROR cannot borrow `b` as mutable because it is also borrowed as immutable
let ref a @ ref mut b = U;
//~^ ERROR cannot borrow `a` as mutable because it is also borrowed as immutable
let ref mut a @ ref b = U;

182
src/test/ui/pattern/bindings-after-at/borrowck-pat-ref-mut-and-ref.stderr
View File

@ -7,7 +7,7 @@ LL | #![feature(bindings_after_at)]
= note: `#[warn(incomplete_features)]` on by default
error: cannot borrow `z` as immutable because it is also borrowed as mutable
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:11:9
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:12:9
|
LL | ref mut z @ &mut Some(ref a) => {
| ---------^^^^^^^^^^^^^-----^
@ -15,8 +15,27 @@ LL | ref mut z @ &mut Some(ref a) => {
| | immutable borrow occurs here
| mutable borrow occurs here
error: cannot borrow `a` as mutable more than once at a time
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:33:9
|
LL | let ref mut a @ (ref b @ ref mut c) = u(); // sub-in-sub
| ---------^^^^-----------------^
| | | |
| | | another mutable borrow occurs here
| | also borrowed as immutable here
| first mutable borrow occurs here
error: cannot borrow `b` as mutable because it is also borrowed as immutable
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:33:22
|
LL | let ref mut a @ (ref b @ ref mut c) = u(); // sub-in-sub
| -----^^^---------
| | |
| | mutable borrow occurs here
| immutable borrow occurs here
error: cannot borrow `a` as mutable because it is also borrowed as immutable
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:25:9
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:37:9
|
LL | let ref a @ ref mut b = U;
| -----^^^---------
@ -25,7 +44,7 @@ LL | let ref a @ ref mut b = U;
| immutable borrow occurs here
error: cannot borrow `a` as immutable because it is also borrowed as mutable
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:27:9
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:39:9
|
LL | let ref mut a @ ref b = U;
| ---------^^^-----
@ -34,7 +53,7 @@ LL | let ref mut a @ ref b = U;
| mutable borrow occurs here
error: cannot borrow `a` as mutable because it is also borrowed as immutable
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:29:9
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:41:9
|
LL | let ref a @ (ref mut b, ref mut c) = (U, U);
| -----^^^^---------^^---------^
@ -44,7 +63,7 @@ LL | let ref a @ (ref mut b, ref mut c) = (U, U);
| immutable borrow occurs here
error: cannot borrow `a` as immutable because it is also borrowed as mutable
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:31:9
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:43:9
|
LL | let ref mut a @ (ref b, ref c) = (U, U);
| ---------^^^^-----^^-----^
@ -54,7 +73,7 @@ LL | let ref mut a @ (ref b, ref c) = (U, U);
| mutable borrow occurs here
error: cannot borrow `a` as immutable because it is also borrowed as mutable
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:34:9
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:46:9
|
LL | let ref mut a @ ref b = u();
| ---------^^^-----
@ -63,7 +82,7 @@ LL | let ref mut a @ ref b = u();
| mutable borrow occurs here
error: cannot borrow `a` as mutable because it is also borrowed as immutable
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:39:9
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:51:9
|
LL | let ref a @ ref mut b = u();
| -----^^^---------
@ -72,7 +91,7 @@ LL | let ref a @ ref mut b = u();
| immutable borrow occurs here
error: cannot borrow `a` as immutable because it is also borrowed as mutable
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:45:9
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:57:9
|
LL | let ref mut a @ ref b = U;
| ---------^^^-----
@ -81,7 +100,7 @@ LL | let ref mut a @ ref b = U;
| mutable borrow occurs here
error: cannot borrow `a` as mutable because it is also borrowed as immutable
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:49:9
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:61:9
|
LL | let ref a @ ref mut b = U;
| -----^^^---------
@ -90,7 +109,7 @@ LL | let ref a @ ref mut b = U;
| immutable borrow occurs here
error: cannot borrow `a` as immutable because it is also borrowed as mutable
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:55:9
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:67:9
|
LL | ref mut a @ Ok(ref b) | ref mut a @ Err(ref b) => {
| ---------^^^^^^-----^
@ -99,7 +118,7 @@ LL | ref mut a @ Ok(ref b) | ref mut a @ Err(ref b) => {
| mutable borrow occurs here
error: cannot borrow `a` as immutable because it is also borrowed as mutable
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:55:33
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:67:33
|
LL | ref mut a @ Ok(ref b) | ref mut a @ Err(ref b) => {
| ---------^^^^^^^-----^
@ -108,7 +127,7 @@ LL | ref mut a @ Ok(ref b) | ref mut a @ Err(ref b) => {
| mutable borrow occurs here
error: cannot borrow `a` as mutable because it is also borrowed as immutable
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:64:9
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:76:9
|
LL | ref a @ Ok(ref mut b) | ref a @ Err(ref mut b) => {
| -----^^^^^^---------^
@ -117,7 +136,7 @@ LL | ref a @ Ok(ref mut b) | ref a @ Err(ref mut b) => {
| immutable borrow occurs here
error: cannot borrow `a` as mutable because it is also borrowed as immutable
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:64:33
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:76:33
|
LL | ref a @ Ok(ref mut b) | ref a @ Err(ref mut b) => {
| -----^^^^^^^---------^
@ -126,7 +145,7 @@ LL | ref a @ Ok(ref mut b) | ref a @ Err(ref mut b) => {
| immutable borrow occurs here
error: cannot borrow `a` as mutable because it is also borrowed as immutable
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:75:9
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:87:9
|
LL | ref a @ Ok(ref mut b) | ref a @ Err(ref mut b) if { *b = U; false } => {}
| -----^^^^^^---------^
@ -135,7 +154,7 @@ LL | ref a @ Ok(ref mut b) | ref a @ Err(ref mut b) if { *b = U; false }
| immutable borrow occurs here
error: cannot borrow `a` as mutable because it is also borrowed as immutable
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:75:33
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:87:33
|
LL | ref a @ Ok(ref mut b) | ref a @ Err(ref mut b) if { *b = U; false } => {}
| -----^^^^^^^---------^
@ -144,7 +163,7 @@ LL | ref a @ Ok(ref mut b) | ref a @ Err(ref mut b) if { *b = U; false }
| immutable borrow occurs here
error: cannot borrow `a` as immutable because it is also borrowed as mutable
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:82:9
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:94:9
|
LL | ref mut a @ Ok(ref b) | ref mut a @ Err(ref b) if { *a = Err(U); false } => {}
| ---------^^^^^^-----^
@ -153,7 +172,7 @@ LL | ref mut a @ Ok(ref b) | ref mut a @ Err(ref b) if { *a = Err(U); fa
| mutable borrow occurs here
error: cannot borrow `a` as immutable because it is also borrowed as mutable
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:82:33
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:94:33
|
LL | ref mut a @ Ok(ref b) | ref mut a @ Err(ref b) if { *a = Err(U); false } => {}
| ---------^^^^^^^-----^
@ -162,7 +181,7 @@ LL | ref mut a @ Ok(ref b) | ref mut a @ Err(ref b) if { *a = Err(U); fa
| mutable borrow occurs here
error: cannot borrow `a` as mutable because it is also borrowed as immutable
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:89:9
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:101:9
|
LL | ref a @ Ok(ref mut b) | ref a @ Err(ref mut b) if { drop(b); false } => {}
| -----^^^^^^---------^
@ -171,7 +190,7 @@ LL | ref a @ Ok(ref mut b) | ref a @ Err(ref mut b) if { drop(b); false
| immutable borrow occurs here
error: cannot borrow `a` as mutable because it is also borrowed as immutable
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:89:33
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:101:33
|
LL | ref a @ Ok(ref mut b) | ref a @ Err(ref mut b) if { drop(b); false } => {}
| -----^^^^^^^---------^
@ -180,42 +199,22 @@ LL | ref a @ Ok(ref mut b) | ref a @ Err(ref mut b) if { drop(b); false
| immutable borrow occurs here
error: cannot borrow `a` as immutable because it is also borrowed as mutable
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:96:9
|
LL | ref mut a @ Ok(ref b) | ref mut a @ Err(ref b) if { drop(a); false } => {}
| ---------^^^^^^-----^
| | |
| | immutable borrow occurs here
| mutable borrow occurs here
error: cannot borrow `a` as immutable because it is also borrowed as mutable
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:96:33
|
LL | ref mut a @ Ok(ref b) | ref mut a @ Err(ref b) if { drop(a); false } => {}
| ---------^^^^^^^-----^
| | |
| | immutable borrow occurs here
| mutable borrow occurs here
error: cannot borrow `a` as mutable because it is also borrowed as immutable
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:103:9
|
LL | let ref a @ (ref mut b, ref mut c) = (U, U);
| -----^^^^---------^^---------^
| | | |
| | | mutable borrow occurs here
| | mutable borrow occurs here
| immutable borrow occurs here
error: cannot borrow `a` as mutable because it is also borrowed as immutable
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:108:9
|
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 | ref mut a @ Ok(ref b) | ref mut a @ Err(ref b) if { drop(a); false } => {}
| ---------^^^^^^-----^
| | |
| | immutable borrow occurs here
| mutable borrow occurs here
error: cannot borrow `a` as immutable because it is also borrowed as mutable
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:108:33
|
LL | ref mut a @ Ok(ref b) | ref mut a @ Err(ref b) if { drop(a); false } => {}
| ---------^^^^^^^-----^
| | |
| | immutable borrow occurs here
| mutable borrow occurs here
error: cannot borrow `a` as mutable because it is also borrowed as immutable
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:115:9
@ -227,9 +226,29 @@ LL | let ref a @ (ref mut b, ref mut c) = (U, U);
| | mutable borrow occurs here
| immutable borrow occurs here
error: cannot borrow `a` as immutable because it is also borrowed as mutable
error: cannot borrow `a` as mutable because it is also borrowed as immutable
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:120:9
|
LL | let ref a @ (ref mut b, ref mut c) = (U, U);
| -----^^^^---------^^---------^
| | | |
| | | mutable borrow occurs here
| | mutable borrow occurs here
| immutable borrow occurs here
error: cannot borrow `a` as mutable because it is also borrowed as immutable
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:127:9
|
LL | let ref a @ (ref mut b, ref mut c) = (U, U);
| -----^^^^---------^^---------^
| | | |
| | | mutable borrow occurs here
| | mutable borrow occurs here
| immutable borrow occurs here
error: cannot borrow `a` as immutable because it is also borrowed as mutable
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:132:9
|
LL | let ref mut a @ (ref b, ref c) = (U, U);
| ---------^^^^-----^^-----^
| | | |
@ -237,8 +256,35 @@ LL | let ref mut a @ (ref b, ref c) = (U, U);
| | immutable borrow occurs here
| mutable borrow occurs here
error: cannot borrow `a` as mutable because it is also borrowed as immutable
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:26:11
|
LL | fn f1(ref a @ ref mut b: U) {}
| -----^^^---------
| | |
| | mutable borrow occurs here
| immutable borrow occurs here
error: cannot borrow `a` as immutable because it is also borrowed as mutable
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:28:11
|
LL | fn f2(ref mut a @ ref b: U) {}
| ---------^^^-----
| | |
| | immutable borrow occurs here
| mutable borrow occurs here
error: cannot borrow `a` as mutable because it is also borrowed as immutable
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:30:11
|
LL | fn f3(ref a @ [ref b, ref mut mid @ .., ref c]: [U; 4]) {}
| -----^^^^^^^^^^^----------------^^^^^^^^
| | |
| | mutable borrow occurs here
| immutable borrow occurs here
error[E0502]: cannot borrow `_` as immutable because it is also borrowed as mutable
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:11:31
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:12:31
|
LL | ref mut z @ &mut Some(ref a) => {
| ----------------------^^^^^-
@ -250,7 +296,7 @@ LL | **z = None;
| ---------- mutable borrow later used here
error[E0502]: cannot borrow `_` as immutable because it is also borrowed as mutable
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:34:21
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:46:21
|
LL | let ref mut a @ ref b = u();
| ------------^^^^^
@ -262,7 +308,7 @@ LL | *a = u();
| -------- mutable borrow later used here
error[E0502]: cannot borrow `_` as mutable because it is also borrowed as immutable
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:39:17
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:51:17
|
LL | let ref a @ ref mut b = u();
| --------^^^^^^^^^
@ -274,7 +320,7 @@ LL | drop(a);
| - immutable borrow later used here
error[E0502]: cannot borrow `_` as mutable because it is also borrowed as immutable
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:64:20
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:76:20
|
LL | ref a @ Ok(ref mut b) | ref a @ Err(ref mut b) => {
| -----------^^^^^^^^^-
@ -286,7 +332,7 @@ LL | drop(a);
| - immutable borrow later used here
error[E0502]: cannot borrow `_` as mutable because it is also borrowed as immutable
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:64:45
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:76:45
|
LL | ref a @ Ok(ref mut b) | ref a @ Err(ref mut b) => {
| ------------^^^^^^^^^-
@ -298,7 +344,7 @@ 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:75:61
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:87:61
|
LL | ref a @ Ok(ref mut b) | ref a @ Err(ref mut b) if { *b = U; false } => {}
| ^^^^^^ cannot assign
@ -306,7 +352,7 @@ 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:82:61
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:94:61
|
LL | ref mut a @ Ok(ref b) | ref mut a @ Err(ref b) if { *a = Err(U); false } => {}
| ^^^^^^^^^^^ cannot assign
@ -314,7 +360,7 @@ 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:89:66
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:101:66
|
LL | ref a @ Ok(ref mut b) | ref a @ Err(ref mut b) if { drop(b); false } => {}
| ^ move occurs because `b` has type `&mut main::U`, which does not implement the `Copy` trait
@ -322,7 +368,7 @@ 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:96:66
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:108:66
|
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<main::U, main::U>`, which does not implement the `Copy` trait
@ -330,7 +376,7 @@ 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[E0502]: cannot borrow `_` as mutable because it is also borrowed as immutable
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:108:18
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:120:18
|
LL | let ref a @ (ref mut b, ref mut c) = (U, U);
| ---------^^^^^^^^^------------
@ -342,7 +388,7 @@ LL | drop(a);
| - immutable borrow later used here
error[E0502]: cannot borrow `_` as mutable because it is also borrowed as immutable
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:108:29
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:120:29
|
LL | let ref a @ (ref mut b, ref mut c) = (U, U);
| --------------------^^^^^^^^^-
@ -354,7 +400,7 @@ LL | drop(a);
| - immutable borrow later used here
error[E0502]: cannot borrow `_` as mutable because it is also borrowed as immutable
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:115:18
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:127:18
|
LL | let ref a @ (ref mut b, ref mut c) = (U, U);
| ---------^^^^^^^^^------------
@ -366,7 +412,7 @@ LL | drop(a);
| - immutable borrow later used here
error[E0502]: cannot borrow `_` as mutable because it is also borrowed as immutable
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:115:29
--> $DIR/borrowck-pat-ref-mut-and-ref.rs:127:29
|
LL | let ref a @ (ref mut b, ref mut c) = (U, U);
| --------------------^^^^^^^^^-
@ -377,7 +423,7 @@ LL | let ref a @ (ref mut b, ref mut c) = (U, U);
LL | drop(a);
| - immutable borrow later used here
error: aborting due to 38 previous errors
error: aborting due to 43 previous errors
Some errors have detailed explanations: E0502, E0507, E0594.
For more information about an error, try `rustc --explain E0502`.

15
src/test/ui/pattern/bindings-after-at/borrowck-pat-ref-mut-twice.rs
View File

@ -2,12 +2,27 @@
#![feature(bindings_after_at)]
//~^ WARN the feature `bindings_after_at` is incomplete and may cause the compiler to crash
#![feature(slice_patterns)]
fn main() {
struct U;
fn u() -> U { U }
fn f1(ref mut a @ ref mut b: U) {}
//~^ ERROR cannot borrow `a` as mutable more than once at a time
fn f2(ref mut a @ ref mut b: U) {}
//~^ ERROR cannot borrow `a` as mutable more than once at a time
fn f3(
ref mut a @ [
//~^ ERROR cannot borrow `a` as mutable more than once at a time
[ref b @ .., _],
[_, ref mut mid @ ..],
..,
[..],
] : [[U; 4]; 5]
) {}
let ref mut a @ ref mut b = U;
//~^ ERROR cannot borrow `a` as mutable more than once at a time
//~| ERROR cannot borrow `_` as mutable more than once at a time

96
src/test/ui/pattern/bindings-after-at/borrowck-pat-ref-mut-twice.stderr
View File

@ -7,7 +7,7 @@ LL | #![feature(bindings_after_at)]
= note: `#[warn(incomplete_features)]` on by default
error: cannot borrow `a` as mutable more than once at a time
--> $DIR/borrowck-pat-ref-mut-twice.rs:11:9
--> $DIR/borrowck-pat-ref-mut-twice.rs:26:9
|
LL | let ref mut a @ ref mut b = U;
| ---------^^^---------
@ -16,7 +16,7 @@ LL | let ref mut a @ ref mut b = U;
| first mutable borrow occurs here
error: cannot borrow `a` as mutable more than once at a time
--> $DIR/borrowck-pat-ref-mut-twice.rs:15:9
--> $DIR/borrowck-pat-ref-mut-twice.rs:30:9
|
LL | let ref mut a @ ref mut b = U;
| ---------^^^---------
@ -25,7 +25,7 @@ LL | let ref mut a @ ref mut b = U;
| first mutable borrow occurs here
error: cannot borrow `a` as mutable more than once at a time
--> $DIR/borrowck-pat-ref-mut-twice.rs:18:9
--> $DIR/borrowck-pat-ref-mut-twice.rs:33:9
|
LL | let ref mut a @ ref mut b = U;
| ---------^^^---------
@ -34,7 +34,7 @@ LL | let ref mut a @ ref mut b = U;
| first mutable borrow occurs here
error: cannot borrow `a` as mutable more than once at a time
--> $DIR/borrowck-pat-ref-mut-twice.rs:21:9
--> $DIR/borrowck-pat-ref-mut-twice.rs:36:9
|
LL | let ref mut a @ ref mut b = U;
| ---------^^^---------
@ -43,7 +43,7 @@ LL | let ref mut a @ ref mut b = U;
| first mutable borrow occurs here
error: cannot borrow `a` as mutable more than once at a time
--> $DIR/borrowck-pat-ref-mut-twice.rs:25:9
--> $DIR/borrowck-pat-ref-mut-twice.rs:40:9
|
LL | let ref mut a @ ref mut b = U;
| ---------^^^---------
@ -52,7 +52,7 @@ LL | let ref mut a @ ref mut b = U;
| first mutable borrow occurs here
error: cannot borrow `a` as mutable more than once at a time
--> $DIR/borrowck-pat-ref-mut-twice.rs:29:9
--> $DIR/borrowck-pat-ref-mut-twice.rs:44:9
|
LL | let ref mut a @ (
| ^--------
@ -74,7 +74,7 @@ LL | | ) = (U, [U, U, U]);
| |_____^
error: cannot borrow `a` as mutable more than once at a time
--> $DIR/borrowck-pat-ref-mut-twice.rs:39:9
--> $DIR/borrowck-pat-ref-mut-twice.rs:54:9
|
LL | let ref mut a @ (
| ^--------
@ -96,31 +96,31 @@ LL | | ) = (u(), [u(), u(), u()]);
| |_________^
error[E0007]: cannot bind by-move with sub-bindings
--> $DIR/borrowck-pat-ref-mut-twice.rs:49:9
--> $DIR/borrowck-pat-ref-mut-twice.rs:64:9
|
LL | let a @ (ref mut b, ref mut c) = (U, U);
| ^^^^^^^^^^^^^^^^^^^^^^^^^^ binds an already bound by-move value by moving it
error[E0007]: cannot bind by-move with sub-bindings
--> $DIR/borrowck-pat-ref-mut-twice.rs:53:9
--> $DIR/borrowck-pat-ref-mut-twice.rs:68:9
|
LL | let a @ (b, [c, d]) = &mut val; // Same as ^--
| ^^^^^^^^^^^^^^^ binds an already bound by-move value by moving it
error[E0007]: cannot bind by-move with sub-bindings
--> $DIR/borrowck-pat-ref-mut-twice.rs:57:9
--> $DIR/borrowck-pat-ref-mut-twice.rs:72:9
|
LL | let a @ &mut ref mut b = &mut U;
| ^^^^^^^^^^^^^^^^^^ binds an already bound by-move value by moving it
error[E0007]: cannot bind by-move with sub-bindings
--> $DIR/borrowck-pat-ref-mut-twice.rs:60:9
--> $DIR/borrowck-pat-ref-mut-twice.rs:75:9
|
LL | let a @ &mut (ref mut b, ref mut c) = &mut (U, U);
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ binds an already bound by-move value by moving it
error: cannot borrow `a` as mutable more than once at a time
--> $DIR/borrowck-pat-ref-mut-twice.rs:65:9
--> $DIR/borrowck-pat-ref-mut-twice.rs:80:9
|
LL | ref mut a @ Ok(ref mut b) | ref mut a @ Err(ref mut b) => {
| ---------^^^^^^---------^
@ -129,7 +129,7 @@ LL | ref mut a @ Ok(ref mut b) | ref mut a @ Err(ref mut b) => {
| first mutable borrow occurs here
error: cannot borrow `a` as mutable more than once at a time
--> $DIR/borrowck-pat-ref-mut-twice.rs:65:37
--> $DIR/borrowck-pat-ref-mut-twice.rs:80:37
|
LL | ref mut a @ Ok(ref mut b) | ref mut a @ Err(ref mut b) => {
| ---------^^^^^^^---------^
@ -138,7 +138,7 @@ LL | ref mut a @ Ok(ref mut b) | ref mut a @ Err(ref mut b) => {
| first mutable borrow occurs here
error: cannot borrow `a` as mutable more than once at a time
--> $DIR/borrowck-pat-ref-mut-twice.rs:71:9
--> $DIR/borrowck-pat-ref-mut-twice.rs:86:9
|
LL | ref mut a @ Ok(ref mut b) | ref mut a @ Err(ref mut b) => {
| ---------^^^^^^---------^
@ -147,7 +147,7 @@ LL | ref mut a @ Ok(ref mut b) | ref mut a @ Err(ref mut b) => {
| first mutable borrow occurs here
error: cannot borrow `a` as mutable more than once at a time
--> $DIR/borrowck-pat-ref-mut-twice.rs:71:37
--> $DIR/borrowck-pat-ref-mut-twice.rs:86:37
|
LL | ref mut a @ Ok(ref mut b) | ref mut a @ Err(ref mut b) => {
| ---------^^^^^^^---------^
@ -156,7 +156,7 @@ LL | ref mut a @ Ok(ref mut b) | ref mut a @ Err(ref mut b) => {
| first mutable borrow occurs here
error: cannot borrow `a` as mutable more than once at a time
--> $DIR/borrowck-pat-ref-mut-twice.rs:78:9
--> $DIR/borrowck-pat-ref-mut-twice.rs:93:9
|
LL | ref mut a @ Ok(ref mut b) | ref mut a @ Err(ref mut b) => {
| ---------^^^^^^---------^
@ -165,7 +165,7 @@ LL | ref mut a @ Ok(ref mut b) | ref mut a @ Err(ref mut b) => {
| first mutable borrow occurs here
error: cannot borrow `a` as mutable more than once at a time
--> $DIR/borrowck-pat-ref-mut-twice.rs:78:37
--> $DIR/borrowck-pat-ref-mut-twice.rs:93:37
|
LL | ref mut a @ Ok(ref mut b) | ref mut a @ Err(ref mut b) => {
| ---------^^^^^^^---------^
@ -174,7 +174,7 @@ LL | ref mut a @ Ok(ref mut b) | ref mut a @ Err(ref mut b) => {
| first mutable borrow occurs here
error: cannot borrow `a` as mutable more than once at a time
--> $DIR/borrowck-pat-ref-mut-twice.rs:90:9
--> $DIR/borrowck-pat-ref-mut-twice.rs:105:9
|
LL | ref mut a @ Ok(ref mut b) | ref mut a @ Err(ref mut b) => {
| ---------^^^^^^---------^
@ -183,7 +183,7 @@ LL | ref mut a @ Ok(ref mut b) | ref mut a @ Err(ref mut b) => {
| first mutable borrow occurs here
error: cannot borrow `a` as mutable more than once at a time
--> $DIR/borrowck-pat-ref-mut-twice.rs:90:37
--> $DIR/borrowck-pat-ref-mut-twice.rs:105:37
|
LL | ref mut a @ Ok(ref mut b) | ref mut a @ Err(ref mut b) => {
| ---------^^^^^^^---------^
@ -191,8 +191,44 @@ LL | ref mut a @ Ok(ref mut b) | ref mut a @ Err(ref mut b) => {
| | another mutable borrow occurs here
| first mutable borrow occurs here
error: cannot borrow `a` as mutable more than once at a time
--> $DIR/borrowck-pat-ref-mut-twice.rs:12:11
|
LL | fn f1(ref mut a @ ref mut b: U) {}
| ---------^^^---------
| | |
| | another mutable borrow occurs here
| first mutable borrow occurs here
error: cannot borrow `a` as mutable more than once at a time
--> $DIR/borrowck-pat-ref-mut-twice.rs:14:11
|
LL | fn f2(ref mut a @ ref mut b: U) {}
| ---------^^^---------
| | |
| | another mutable borrow occurs here
| first mutable borrow occurs here
error: cannot borrow `a` as mutable more than once at a time
--> $DIR/borrowck-pat-ref-mut-twice.rs:17:9
|
LL | ref mut a @ [
| ^--------
| |
| _________first mutable borrow occurs here
| |
LL | |
LL | | [ref b @ .., _],
| | ---------- also borrowed as immutable here
LL | | [_, ref mut mid @ ..],
| | ---------------- another mutable borrow occurs here
LL | | ..,
LL | | [..],
LL | | ] : [[U; 4]; 5]
| |_________^
error[E0499]: cannot borrow `_` as mutable more than once at a time
--> $DIR/borrowck-pat-ref-mut-twice.rs:11:21
--> $DIR/borrowck-pat-ref-mut-twice.rs:26:21
|
LL | let ref mut a @ ref mut b = U;
| ------------^^^^^^^^^
@ -204,7 +240,7 @@ LL | drop(a);
| - first borrow later used here
error[E0499]: cannot borrow `_` as mutable more than once at a time
--> $DIR/borrowck-pat-ref-mut-twice.rs:21:21
--> $DIR/borrowck-pat-ref-mut-twice.rs:36:21
|
LL | let ref mut a @ ref mut b = U;
| ------------^^^^^^^^^
@ -216,7 +252,7 @@ LL | *a = U;
| ------ first borrow later used here
error[E0382]: borrow of moved value
--> $DIR/borrowck-pat-ref-mut-twice.rs:49:25
--> $DIR/borrowck-pat-ref-mut-twice.rs:64:25
|
LL | let a @ (ref mut b, ref mut c) = (U, U);
| ----------------^^^^^^^^^- ------ move occurs because value has type `(main::U, main::U)`, which does not implement the `Copy` trait
@ -225,7 +261,7 @@ LL | let a @ (ref mut b, ref mut c) = (U, U);
| value moved here
error[E0382]: borrow of moved value
--> $DIR/borrowck-pat-ref-mut-twice.rs:53:21
--> $DIR/borrowck-pat-ref-mut-twice.rs:68:21
|
LL | let a @ (b, [c, d]) = &mut val; // Same as ^--
| ------------^-- -------- move occurs because value has type `&mut (main::U, [main::U; 2])`, which does not implement the `Copy` trait
@ -234,7 +270,7 @@ LL | let a @ (b, [c, d]) = &mut val; // Same as ^--
| value moved here
error[E0382]: borrow of moved value
--> $DIR/borrowck-pat-ref-mut-twice.rs:57:18
--> $DIR/borrowck-pat-ref-mut-twice.rs:72:18
|
LL | let a @ &mut ref mut b = &mut U;
| ---------^^^^^^^^^ ------ move occurs because value has type `&mut main::U`, which does not implement the `Copy` trait
@ -243,7 +279,7 @@ LL | let a @ &mut ref mut b = &mut U;
| value moved here
error[E0382]: borrow of moved value
--> $DIR/borrowck-pat-ref-mut-twice.rs:60:30
--> $DIR/borrowck-pat-ref-mut-twice.rs:75:30
|
LL | let a @ &mut (ref mut b, ref mut c) = &mut (U, U);
| ---------------------^^^^^^^^^- ----------- move occurs because value has type `&mut (main::U, main::U)`, which does not implement the `Copy` trait
@ -252,7 +288,7 @@ LL | let a @ &mut (ref mut b, ref mut c) = &mut (U, U);
| value moved here
error[E0499]: cannot borrow `_` as mutable more than once at a time
--> $DIR/borrowck-pat-ref-mut-twice.rs:78:24
--> $DIR/borrowck-pat-ref-mut-twice.rs:93:24
|
LL | ref mut a @ Ok(ref mut b) | ref mut a @ Err(ref mut b) => {
| ---------------^^^^^^^^^-
@ -264,7 +300,7 @@ LL | *a = Err(U);
| ----------- first borrow later used here
error[E0499]: cannot borrow `_` as mutable more than once at a time
--> $DIR/borrowck-pat-ref-mut-twice.rs:78:53
--> $DIR/borrowck-pat-ref-mut-twice.rs:93:53
|
LL | ref mut a @ Ok(ref mut b) | ref mut a @ Err(ref mut b) => {
| ----------------^^^^^^^^^-
@ -276,7 +312,7 @@ LL | *a = Err(U);
| ----------- first borrow later used here
error[E0499]: cannot borrow `_` as mutable more than once at a time
--> $DIR/borrowck-pat-ref-mut-twice.rs:90:24
--> $DIR/borrowck-pat-ref-mut-twice.rs:105:24
|
LL | ref mut a @ Ok(ref mut b) | ref mut a @ Err(ref mut b) => {
| ---------------^^^^^^^^^-
@ -288,7 +324,7 @@ LL | drop(a);
| - first borrow later used here
error[E0499]: cannot borrow `_` as mutable more than once at a time
--> $DIR/borrowck-pat-ref-mut-twice.rs:90:53
--> $DIR/borrowck-pat-ref-mut-twice.rs:105:53
|
LL | ref mut a @ Ok(ref mut b) | ref mut a @ Err(ref mut b) => {
| ----------------^^^^^^^^^-
@ -299,7 +335,7 @@ 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 29 previous errors
error: aborting due to 32 previous errors
Some errors have detailed explanations: E0007, E0382, E0499.
For more information about an error, try `rustc --explain E0007`.

7
src/test/ui/pattern/bindings-after-at/default-binding-modes-both-sides-independent.rs
View File

@ -13,6 +13,13 @@
fn main() {
struct NotCopy;
fn f1(a @ b: &NotCopy) { // OK
let _: &NotCopy = a;
}
fn f2(ref a @ b: &NotCopy) {
let _: &&NotCopy = a; // Ok
}
let a @ b = &NotCopy; // OK
let _: &NotCopy = a;
let ref a @ b = &NotCopy; // OK

8
src/test/ui/pattern/bindings-after-at/default-binding-modes-both-sides-independent.stderr
View File

@ -7,7 +7,7 @@ LL | #![feature(bindings_after_at)]
= note: `#[warn(incomplete_features)]` on by default
error[E0009]: cannot bind by-move and by-ref in the same pattern
--> $DIR/default-binding-modes-both-sides-independent.rs:21:17
--> $DIR/default-binding-modes-both-sides-independent.rs:28:17
|
LL | let ref a @ b = NotCopy;
| --------^
@ -16,7 +16,7 @@ LL | let ref a @ b = NotCopy;
| by-ref pattern here
error[E0009]: cannot bind by-move and by-ref in the same pattern
--> $DIR/default-binding-modes-both-sides-independent.rs:22:21
--> $DIR/default-binding-modes-both-sides-independent.rs:29:21
|
LL | let ref mut a @ b = NotCopy;
| ------------^
@ -25,7 +25,7 @@ LL | let ref mut a @ b = NotCopy;
| by-ref pattern here
error[E0009]: cannot bind by-move and by-ref in the same pattern
--> $DIR/default-binding-modes-both-sides-independent.rs:24:20
--> $DIR/default-binding-modes-both-sides-independent.rs:31:20
|
LL | Ok(ref a @ b) | Err(ref a @ b) => {}
| --------^ --------^
@ -36,7 +36,7 @@ LL | Ok(ref a @ b) | Err(ref a @ b) => {}
| by-ref pattern here
error[E0009]: cannot bind by-move and by-ref in the same pattern
--> $DIR/default-binding-modes-both-sides-independent.rs:28:17
--> $DIR/default-binding-modes-both-sides-independent.rs:35:17
|
LL | ref a @ b => {}
| --------^

12
src/test/ui/pattern/bindings-after-at/pat-at-same-name-both.rs
View File

@ -7,6 +7,18 @@
//~^ WARN the feature `or_patterns` is incomplete and may cause the compiler to crash
fn main() {
fn f(a @ a @ a: ()) {}
//~^ ERROR identifier `a` is bound more than once in this parameter list
//~| ERROR identifier `a` is bound more than once in this parameter list
match Ok(0) {
Ok(a @ b @ a)
//~^ ERROR identifier `a` is bound more than once in the same pattern
| Err(a @ b @ a)
//~^ ERROR identifier `a` is bound more than once in the same pattern
=> {}
}
let a @ a @ a = ();
//~^ ERROR identifier `a` is bound more than once in the same pattern
//~| ERROR identifier `a` is bound more than once in the same pattern

41
src/test/ui/pattern/bindings-after-at/pat-at-same-name-both.stderr
View File

@ -1,35 +1,59 @@
error[E0415]: identifier `a` is bound more than once in this parameter list
--> $DIR/pat-at-same-name-both.rs:10:14
|
LL | fn f(a @ a @ a: ()) {}
| ^ used as parameter more than once
error[E0415]: identifier `a` is bound more than once in this parameter list
--> $DIR/pat-at-same-name-both.rs:10:18
|
LL | fn f(a @ a @ a: ()) {}
| ^ used as parameter more than once
error[E0416]: identifier `a` is bound more than once in the same pattern
--> $DIR/pat-at-same-name-both.rs:10:13
--> $DIR/pat-at-same-name-both.rs:15:20
|
LL | Ok(a @ b @ a)
| ^ used in a pattern more than once
error[E0416]: identifier `a` is bound more than once in the same pattern
--> $DIR/pat-at-same-name-both.rs:17:23
|
LL | | Err(a @ b @ a)
| ^ used in a pattern more than once
error[E0416]: identifier `a` is bound more than once in the same pattern
--> $DIR/pat-at-same-name-both.rs:22:13
|
LL | let a @ a @ a = ();
| ^ used in a pattern more than once
error[E0416]: identifier `a` is bound more than once in the same pattern
--> $DIR/pat-at-same-name-both.rs:10:17
--> $DIR/pat-at-same-name-both.rs:22:17
|
LL | let a @ a @ a = ();
| ^ used in a pattern more than once
error[E0416]: identifier `a` is bound more than once in the same pattern
--> $DIR/pat-at-same-name-both.rs:13:21
--> $DIR/pat-at-same-name-both.rs:25:21
|
LL | let ref a @ ref a = ();
| ^ used in a pattern more than once
error[E0416]: identifier `a` is bound more than once in the same pattern
--> $DIR/pat-at-same-name-both.rs:15:29
--> $DIR/pat-at-same-name-both.rs:27:29
|
LL | let ref mut a @ ref mut a = ();
| ^ used in a pattern more than once
error[E0416]: identifier `a` is bound more than once in the same pattern
--> $DIR/pat-at-same-name-both.rs:18:17
--> $DIR/pat-at-same-name-both.rs:30:17
|
LL | let a @ (Ok(a) | Err(a)) = Ok(());
| ^ used in a pattern more than once
error[E0416]: identifier `a` is bound more than once in the same pattern
--> $DIR/pat-at-same-name-both.rs:18:26
--> $DIR/pat-at-same-name-both.rs:30:26
|
LL | let a @ (Ok(a) | Err(a)) = Ok(());
| ^ used in a pattern more than once
@ -48,6 +72,7 @@ warning: the feature `or_patterns` is incomplete and may cause the compiler to c
LL | #![feature(or_patterns)]
| ^^^^^^^^^^^
error: aborting due to 6 previous errors
error: aborting due to 10 previous errors
For more information about this error, try `rustc --explain E0416`.
Some errors have detailed explanations: E0415, E0416.
For more information about an error, try `rustc --explain E0415`.