src/test/ui/bound-suggestions.stderr

   1 error[E0277]: `impl Sized` doesn't implement `Debug`
   2   --> $DIR/bound-suggestions.rs:9:22
   3    |
   4 LL |     println!("{:?}", t);
   5    |                      ^ `impl Sized` cannot be formatted using `{:?}` because it doesn't implement `Debug`
   6    |
   7    = note: required by `std::fmt::Debug::fmt`
   8    = note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
   9 help: consider further restricting this bound
  10    |
  11 LL | fn test_impl(t: impl Sized + std::fmt::Debug) {
  12    |                            ^^^^^^^^^^^^^^^^^
  13
  14 error[E0277]: `T` doesn't implement `Debug`
  15   --> $DIR/bound-suggestions.rs:15:22
  16    |
  17 LL |     println!("{:?}", t);
  18    |                      ^ `T` cannot be formatted using `{:?}` because it doesn't implement `Debug`
  19    |
  20    = note: required by `std::fmt::Debug::fmt`
  21    = note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
  22 help: consider restricting type parameter `T`
  23    |
  24 LL | fn test_no_bounds<T: std::fmt::Debug>(t: T) {
  25    |                    ^^^^^^^^^^^^^^^^^
  26
  27 error[E0277]: `T` doesn't implement `Debug`
  28   --> $DIR/bound-suggestions.rs:21:22
  29    |
  30 LL |     println!("{:?}", t);
  31    |                      ^ `T` cannot be formatted using `{:?}` because it doesn't implement `Debug`
  32    |
  33    = note: required by `std::fmt::Debug::fmt`
  34    = note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
  35 help: consider further restricting this bound
  36    |
  37 LL | fn test_one_bound<T: Sized + std::fmt::Debug>(t: T) {
  38    |                            ^^^^^^^^^^^^^^^^^
  39
  40 error[E0277]: `Y` doesn't implement `Debug`
  41   --> $DIR/bound-suggestions.rs:27:30
  42    |
  43 LL |     println!("{:?} {:?}", x, y);
  44    |                              ^ `Y` cannot be formatted using `{:?}` because it doesn't implement `Debug`
  45    |
  46    = note: required by `std::fmt::Debug::fmt`
  47    = note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
  48 help: consider further restricting type parameter `Y`
  49    |
  50 LL | fn test_no_bounds_where<X, Y>(x: X, y: Y) where X: std::fmt::Debug, Y: std::fmt::Debug {
  51    |                                                                   ^^^^^^^^^^^^^^^^^^^^
  52
  53 error[E0277]: `X` doesn't implement `Debug`
  54   --> $DIR/bound-suggestions.rs:33:22
  55    |
  56 LL |     println!("{:?}", x);
  57    |                      ^ `X` cannot be formatted using `{:?}` because it doesn't implement `Debug`
  58    |
  59    = note: required by `std::fmt::Debug::fmt`
  60    = note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
  61 help: consider further restricting this bound
  62    |
  63 LL | fn test_one_bound_where<X>(x: X) where X: Sized + std::fmt::Debug {
  64    |                                                 ^^^^^^^^^^^^^^^^^
  65
  66 error[E0277]: `X` doesn't implement `Debug`
  67   --> $DIR/bound-suggestions.rs:39:22
  68    |
  69 LL |     println!("{:?}", x);
  70    |                      ^ `X` cannot be formatted using `{:?}` because it doesn't implement `Debug`
  71    |
  72    = note: required by `std::fmt::Debug::fmt`
  73    = note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
  74 help: consider further restricting type parameter `X`
  75    |
  76 LL | fn test_many_bounds_where<X>(x: X) where X: Sized, X: Sized, X: std::fmt::Debug {
  77    |                                                            ^^^^^^^^^^^^^^^^^^^^
  78
  79 error[E0277]: the size for values of type `Self` cannot be known at compilation time
  80   --> $DIR/bound-suggestions.rs:44:46
  81    |
  82 LL |     const SIZE: usize = core::mem::size_of::<Self>();
  83    |                                              ^^^^ doesn't have a size known at compile-time
  84    |
  85   ::: $SRC_DIR/core/src/mem/mod.rs:LL:COL
  86    |
  87 LL | pub const fn size_of<T>() -> usize {
  88    |                      - required by this bound in `std::mem::size_of`
  89    |
  90 help: consider further restricting `Self`
  91    |
  92 LL | trait Foo<T>: Sized {
  93    |             ^^^^^^^
  94
  95 error[E0277]: the size for values of type `Self` cannot be known at compilation time
  96   --> $DIR/bound-suggestions.rs:49:46
  97    |
  98 LL |     const SIZE: usize = core::mem::size_of::<Self>();
  99    |                                              ^^^^ doesn't have a size known at compile-time
 100    |
 101   ::: $SRC_DIR/core/src/mem/mod.rs:LL:COL
 102    |
 103 LL | pub const fn size_of<T>() -> usize {
 104    |                      - required by this bound in `std::mem::size_of`
 105    |
 106 help: consider further restricting `Self`
 107    |
 108 LL | trait Bar: std::fmt::Display + Sized {
 109    |                              ^^^^^^^
 110
 111 error[E0277]: the size for values of type `Self` cannot be known at compilation time
 112   --> $DIR/bound-suggestions.rs:54:46
 113    |
 114 LL |     const SIZE: usize = core::mem::size_of::<Self>();
 115    |                                              ^^^^ doesn't have a size known at compile-time
 116    |
 117   ::: $SRC_DIR/core/src/mem/mod.rs:LL:COL
 118    |
 119 LL | pub const fn size_of<T>() -> usize {
 120    |                      - required by this bound in `std::mem::size_of`
 121    |
 122 help: consider further restricting `Self`
 123    |
 124 LL | trait Baz: Sized where Self: std::fmt::Display {
 125    |          ^^^^^^^
 126
 127 error[E0277]: the size for values of type `Self` cannot be known at compilation time
 128   --> $DIR/bound-suggestions.rs:59:46
 129    |
 130 LL |     const SIZE: usize = core::mem::size_of::<Self>();
 131    |                                              ^^^^ doesn't have a size known at compile-time
 132    |
 133   ::: $SRC_DIR/core/src/mem/mod.rs:LL:COL
 134    |
 135 LL | pub const fn size_of<T>() -> usize {
 136    |                      - required by this bound in `std::mem::size_of`
 137    |
 138 help: consider further restricting `Self`
 139    |
 140 LL | trait Qux<T>: Sized where Self: std::fmt::Display {
 141    |             ^^^^^^^
 142
 143 error[E0277]: the size for values of type `Self` cannot be known at compilation time
 144   --> $DIR/bound-suggestions.rs:64:46
 145    |
 146 LL |     const SIZE: usize = core::mem::size_of::<Self>();
 147    |                                              ^^^^ doesn't have a size known at compile-time
 148    |
 149   ::: $SRC_DIR/core/src/mem/mod.rs:LL:COL
 150    |
 151 LL | pub const fn size_of<T>() -> usize {
 152    |                      - required by this bound in `std::mem::size_of`
 153    |
 154 help: consider further restricting `Self`
 155    |
 156 LL | trait Bat<T>: std::fmt::Display + Sized {
 157    |                                 ^^^^^^^
 158
 159 error: aborting due to 11 previous errors
 160
 161 For more information about this error, try `rustc --explain E0277`.