File: unsized-fn-arg.stderr

package info (click to toggle)
rustc 1.87.0%2Bdfsg1-1
  • links: PTS, VCS
  • area: main
  • in suites: forky, sid
  • size: 925,564 kB
  • sloc: xml: 158,127; python: 36,039; javascript: 19,761; sh: 19,737; cpp: 18,981; ansic: 13,133; asm: 4,376; makefile: 710; perl: 29; lisp: 28; ruby: 19; sql: 11
file content (22 lines) | stat: -rw-r--r-- 760 bytes parent folder | download | duplicates (15)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
error[E0277]: the size for values of type `T` cannot be known at compilation time
  --> $DIR/unsized-fn-arg.rs:5:20
   |
LL | fn f<T: ?Sized>(t: T) {}
   |      -             ^ doesn't have a size known at compile-time
   |      |
   |      this type parameter needs to be `Sized`
   |
   = help: unsized fn params are gated as an unstable feature
help: consider removing the `?Sized` bound to make the type parameter `Sized`
   |
LL - fn f<T: ?Sized>(t: T) {}
LL + fn f<T>(t: T) {}
   |
help: function arguments must have a statically known size, borrowed types always have a known size
   |
LL | fn f<T: ?Sized>(t: &T) {}
   |                    +

error: aborting due to 1 previous error

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