summaryrefslogtreecommitdiffstats
path: root/tests/ui/union/union-sized-field.stderr
blob: 771e8f261999560b2c99df333469c28b2fc20544 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
error[E0277]: the size for values of type `T` cannot be known at compilation time
  --> $DIR/union-sized-field.rs:4:12
   |
LL | union Foo<T: ?Sized> {
   |           - this type parameter needs to be `std::marker::Sized`
LL |     value: ManuallyDrop<T>,
   |            ^^^^^^^^^^^^^^^ doesn't have a size known at compile-time
   |
   = note: required because it appears within the type `ManuallyDrop<T>`
   = note: no field of a union may have a dynamically sized type
   = help: change the field's type to have a statically known size
help: consider removing the `?Sized` bound to make the type parameter `Sized`
   |
LL - union Foo<T: ?Sized> {
LL + union Foo<T> {
   |
help: borrowed types always have a statically known size
   |
LL |     value: &ManuallyDrop<T>,
   |            +
help: the `Box` type always has a statically known size and allocates its contents in the heap
   |
LL |     value: Box<ManuallyDrop<T>>,
   |            ++++               +

error[E0277]: the size for values of type `T` cannot be known at compilation time
  --> $DIR/union-sized-field.rs:9:12
   |
LL | struct Foo2<T: ?Sized> {
   |             - this type parameter needs to be `std::marker::Sized`
LL |     value: ManuallyDrop<T>,
   |            ^^^^^^^^^^^^^^^ doesn't have a size known at compile-time
   |
   = note: required because it appears within the type `ManuallyDrop<T>`
   = note: only the last field of a struct may have a dynamically sized type
   = help: change the field's type to have a statically known size
help: consider removing the `?Sized` bound to make the type parameter `Sized`
   |
LL - struct Foo2<T: ?Sized> {
LL + struct Foo2<T> {
   |
help: borrowed types always have a statically known size
   |
LL |     value: &ManuallyDrop<T>,
   |            +
help: the `Box` type always has a statically known size and allocates its contents in the heap
   |
LL |     value: Box<ManuallyDrop<T>>,
   |            ++++               +

error[E0277]: the size for values of type `T` cannot be known at compilation time
  --> $DIR/union-sized-field.rs:15:11
   |
LL | enum Foo3<T: ?Sized> {
   |           - this type parameter needs to be `std::marker::Sized`
LL |     Value(ManuallyDrop<T>),
   |           ^^^^^^^^^^^^^^^ doesn't have a size known at compile-time
   |
   = note: required because it appears within the type `ManuallyDrop<T>`
   = note: no field of an enum variant may have a dynamically sized type
   = help: change the field's type to have a statically known size
help: consider removing the `?Sized` bound to make the type parameter `Sized`
   |
LL - enum Foo3<T: ?Sized> {
LL + enum Foo3<T> {
   |
help: borrowed types always have a statically known size
   |
LL |     Value(&ManuallyDrop<T>),
   |           +
help: the `Box` type always has a statically known size and allocates its contents in the heap
   |
LL |     Value(Box<ManuallyDrop<T>>),
   |           ++++               +

error: aborting due to 3 previous errors

For more information about this error, try `rustc --explain E0277`.