mirror of
https://github.com/rust-lang/rust.git
synced 2024-12-03 12:13:43 +00:00
91 lines
3.4 KiB
Plaintext
91 lines
3.4 KiB
Plaintext
error[E0277]: the size for values of type `U` cannot be known at compilation time
|
|
--> $DIR/suggest-where-clause.rs:7:20
|
|
|
|
|
LL | fn check<T: Iterator, U: ?Sized>() {
|
|
| - this type parameter needs to be `Sized`
|
|
LL | // suggest a where-clause, if needed
|
|
LL | mem::size_of::<U>();
|
|
| ^ doesn't have a size known at compile-time
|
|
|
|
|
note: required by a bound in `std::mem::size_of`
|
|
--> $SRC_DIR/core/src/mem/mod.rs:LL:COL
|
|
help: consider removing the `?Sized` bound to make the type parameter `Sized`
|
|
|
|
|
LL - fn check<T: Iterator, U: ?Sized>() {
|
|
LL + fn check<T: Iterator, U>() {
|
|
|
|
|
|
|
error[E0277]: the size for values of type `U` cannot be known at compilation time
|
|
--> $DIR/suggest-where-clause.rs:10:20
|
|
|
|
|
LL | fn check<T: Iterator, U: ?Sized>() {
|
|
| - this type parameter needs to be `Sized`
|
|
...
|
|
LL | mem::size_of::<Misc<U>>();
|
|
| ^^^^^^^ doesn't have a size known at compile-time
|
|
|
|
|
note: required because it appears within the type `Misc<U>`
|
|
--> $DIR/suggest-where-clause.rs:3:8
|
|
|
|
|
LL | struct Misc<T:?Sized>(T);
|
|
| ^^^^
|
|
note: required by a bound in `std::mem::size_of`
|
|
--> $SRC_DIR/core/src/mem/mod.rs:LL:COL
|
|
help: consider removing the `?Sized` bound to make the type parameter `Sized`
|
|
|
|
|
LL - fn check<T: Iterator, U: ?Sized>() {
|
|
LL + fn check<T: Iterator, U>() {
|
|
|
|
|
|
|
error[E0277]: the trait bound `u64: From<T>` is not satisfied
|
|
--> $DIR/suggest-where-clause.rs:15:6
|
|
|
|
|
LL | <u64 as From<T>>::from;
|
|
| ^^^ the trait `From<T>` is not implemented for `u64`
|
|
|
|
|
help: consider introducing a `where` clause, but there might be an alternative better way to express this requirement
|
|
|
|
|
LL | fn check<T: Iterator, U: ?Sized>() where u64: From<T> {
|
|
| ++++++++++++++++++
|
|
|
|
error[E0277]: the trait bound `u64: From<<T as Iterator>::Item>` is not satisfied
|
|
--> $DIR/suggest-where-clause.rs:18:6
|
|
|
|
|
LL | <u64 as From<<T as Iterator>::Item>>::from;
|
|
| ^^^ the trait `From<<T as Iterator>::Item>` is not implemented for `u64`
|
|
|
|
|
help: consider introducing a `where` clause, but there might be an alternative better way to express this requirement
|
|
|
|
|
LL | fn check<T: Iterator, U: ?Sized>() where u64: From<<T as Iterator>::Item> {
|
|
| ++++++++++++++++++++++++++++++++++++++
|
|
|
|
error[E0277]: the trait bound `Misc<_>: From<T>` is not satisfied
|
|
--> $DIR/suggest-where-clause.rs:23:6
|
|
|
|
|
LL | <Misc<_> as From<T>>::from;
|
|
| ^^^^^^^ the trait `From<T>` is not implemented for `Misc<_>`
|
|
|
|
error[E0277]: the size for values of type `[T]` cannot be known at compilation time
|
|
--> $DIR/suggest-where-clause.rs:28:20
|
|
|
|
|
LL | mem::size_of::<[T]>();
|
|
| ^^^ doesn't have a size known at compile-time
|
|
|
|
|
= help: the trait `Sized` is not implemented for `[T]`
|
|
note: required by a bound in `std::mem::size_of`
|
|
--> $SRC_DIR/core/src/mem/mod.rs:LL:COL
|
|
|
|
error[E0277]: the size for values of type `[&U]` cannot be known at compilation time
|
|
--> $DIR/suggest-where-clause.rs:31:20
|
|
|
|
|
LL | mem::size_of::<[&U]>();
|
|
| ^^^^ doesn't have a size known at compile-time
|
|
|
|
|
= help: the trait `Sized` is not implemented for `[&U]`
|
|
note: required by a bound in `std::mem::size_of`
|
|
--> $SRC_DIR/core/src/mem/mod.rs:LL:COL
|
|
|
|
error: aborting due to 7 previous errors
|
|
|
|
For more information about this error, try `rustc --explain E0277`.
|