src/test/ui/unsized5.stderr

   1 error[E0277]: the size for values of type `X` cannot be known at compilation time
   2   --> $DIR/unsized5.rs:4:9
   3    |
   4 LL | struct S1<X: ?Sized> {
   5    |           - this type parameter needs to be `Sized`
   6 LL |     f1: X,
   7    |         ^ doesn't have a size known at compile-time
   8    |
   9    = note: only the last field of a struct may have a dynamically sized type
  10    = help: change the field's type to have a statically known size
  11 help: borrowed types always have a statically known size
  12    |
  13 LL |     f1: &X,
  14    |         ^
  15 help: the `Box` type always has a statically known size and allocates its contents in the heap
  16    |
  17 LL |     f1: Box<X>,
  18    |         ^^^^ ^
  19
  20 error[E0277]: the size for values of type `X` cannot be known at compilation time
  21   --> $DIR/unsized5.rs:10:8
  22    |
  23 LL | struct S2<X: ?Sized> {
  24    |           - this type parameter needs to be `Sized`
  25 LL |     f: isize,
  26 LL |     g: X,
  27    |        ^ doesn't have a size known at compile-time
  28    |
  29    = note: only the last field of a struct may have a dynamically sized type
  30    = help: change the field's type to have a statically known size
  31 help: borrowed types always have a statically known size
  32    |
  33 LL |     g: &X,
  34    |        ^
  35 help: the `Box` type always has a statically known size and allocates its contents in the heap
  36    |
  37 LL |     g: Box<X>,
  38    |        ^^^^ ^
  39
  40 error[E0277]: the size for values of type `str` cannot be known at compilation time
  41   --> $DIR/unsized5.rs:15:8
  42    |
  43 LL |     f: str,
  44    |        ^^^ doesn't have a size known at compile-time
  45    |
  46    = help: the trait `Sized` is not implemented for `str`
  47    = note: only the last field of a struct may have a dynamically sized type
  48    = help: change the field's type to have a statically known size
  49 help: borrowed types always have a statically known size
  50    |
  51 LL |     f: &str,
  52    |        ^
  53 help: the `Box` type always has a statically known size and allocates its contents in the heap
  54    |
  55 LL |     f: Box<str>,
  56    |        ^^^^   ^
  57
  58 error[E0277]: the size for values of type `[u8]` cannot be known at compilation time
  59   --> $DIR/unsized5.rs:20:8
  60    |
  61 LL |     f: [u8],
  62    |        ^^^^ doesn't have a size known at compile-time
  63    |
  64    = help: the trait `Sized` is not implemented for `[u8]`
  65    = note: only the last field of a struct may have a dynamically sized type
  66    = help: change the field's type to have a statically known size
  67 help: borrowed types always have a statically known size
  68    |
  69 LL |     f: &[u8],
  70    |        ^
  71 help: the `Box` type always has a statically known size and allocates its contents in the heap
  72    |
  73 LL |     f: Box<[u8]>,
  74    |        ^^^^    ^
  75
  76 error[E0277]: the size for values of type `X` cannot be known at compilation time
  77   --> $DIR/unsized5.rs:25:8
  78    |
  79 LL | enum E<X: ?Sized> {
  80    |        - this type parameter needs to be `Sized`
  81 LL |     V1(X, isize),
  82    |        ^ doesn't have a size known at compile-time
  83    |
  84    = note: no field of an enum variant may have a dynamically sized type
  85    = help: change the field's type to have a statically known size
  86 help: borrowed types always have a statically known size
  87    |
  88 LL |     V1(&X, isize),
  89    |        ^
  90 help: the `Box` type always has a statically known size and allocates its contents in the heap
  91    |
  92 LL |     V1(Box<X>, isize),
  93    |        ^^^^ ^
  94
  95 error[E0277]: the size for values of type `X` cannot be known at compilation time
  96   --> $DIR/unsized5.rs:29:12
  97    |
  98 LL | enum F<X: ?Sized> {
  99    |        - this type parameter needs to be `Sized`
 100 LL |     V2{f1: X, f: isize},
 101    |            ^ doesn't have a size known at compile-time
 102    |
 103    = note: no field of an enum variant may have a dynamically sized type
 104    = help: change the field's type to have a statically known size
 105 help: borrowed types always have a statically known size
 106    |
 107 LL |     V2{f1: &X, f: isize},
 108    |            ^
 109 help: the `Box` type always has a statically known size and allocates its contents in the heap
 110    |
 111 LL |     V2{f1: Box<X>, f: isize},
 112    |            ^^^^ ^
 113
 114 error: aborting due to 6 previous errors
 115
 116 For more information about this error, try `rustc --explain E0277`.