1 error[E0015]: calls in constants are limited to constant functions, tuple structs and tuple variants
2 --> $DIR/const-for.rs:5:14
7 error[E0015]: calls in constants are limited to constant functions, tuple structs and tuple variants
8 --> $DIR/const-for.rs:5:14
13 error: aborting due to 2 previous errors
15 For more information about this error, try `rustc --explain E0015`.