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error[E0379]: functions in traits cannot be declared const
--> $DIR/issue-54954.rs:5:5
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LL | const fn const_val<T: Sized>() -> usize {
| ^^^^^ functions in traits cannot be const
error[E0790]: cannot call associated function on trait without specifying the corresponding `impl` type
--> $DIR/issue-54954.rs:1:24
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LL | const ARR_LEN: usize = Tt::const_val::<[i8; 123]>();
| ^^^^^^^^^^^^^^^^^^^^^^^^^^ cannot call associated function of trait
...
LL | / const fn const_val<T: Sized>() -> usize {
LL | |
LL | | core::mem::size_of::<T>()
LL | | }
| |_____- `Tt::const_val` defined here
error: aborting due to 2 previous errors
Some errors have detailed explanations: E0379, E0790.
For more information about an error, try `rustc --explain E0379`.
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