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Add regression test for manual_swap

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flip1995 2019-12-03 13:18:45 +01:00
parent 7a943a9dfc
commit d3232b0fce
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2 changed files with 14 additions and 5 deletions
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9
tests/ui/swap.rs
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@ -46,6 +46,15 @@ fn slice() {
foo.swap(0, 1);
}
fn unswappable_slice() {
let foo = &mut [vec![1, 2], vec![3, 4]];
let temp = foo[0][1];
foo[0][1] = foo[1][0];
foo[1][0] = temp;
// swap(foo[0][1], foo[1][0]) would fail
}
fn vec() {
let mut foo = vec![1, 2];
let temp = foo[0];

10
tests/ui/swap.stderr
View File

@ -17,7 +17,7 @@ LL | | foo[1] = temp;
| |_________________^ help: try: `foo.swap(0, 1)`
error: this looks like you are swapping elements of `foo` manually
--> $DIR/swap.rs:51:5
--> $DIR/swap.rs:60:5
|
LL | / let temp = foo[0];
LL | | foo[0] = foo[1];
@ -25,7 +25,7 @@ LL | | foo[1] = temp;
| |_________________^ help: try: `foo.swap(0, 1)`
error: this looks like you are swapping `a` and `b` manually
--> $DIR/swap.rs:71:7
--> $DIR/swap.rs:80:7
|
LL | ; let t = a;
| _______^
@ -36,7 +36,7 @@ LL | | b = t;
= note: or maybe you should use `std::mem::replace`?
error: this looks like you are swapping `c.0` and `a` manually
--> $DIR/swap.rs:80:7
--> $DIR/swap.rs:89:7
|
LL | ; let t = c.0;
| _______^
@ -47,7 +47,7 @@ LL | | a = t;
= note: or maybe you should use `std::mem::replace`?
error: this looks like you are trying to swap `a` and `b`
--> $DIR/swap.rs:68:5
--> $DIR/swap.rs:77:5
|
LL | / a = b;
LL | | b = a;
@ -57,7 +57,7 @@ LL | | b = a;
= note: or maybe you should use `std::mem::replace`?
error: this looks like you are trying to swap `c.0` and `a`
--> $DIR/swap.rs:77:5
--> $DIR/swap.rs:86:5
|
LL | / c.0 = a;
LL | | a = c.0;