1 error[E0605]: non-primitive cast: `fn(isize) {foo}` as `extern "C" fn() -> isize`
2 --> $DIR/cast-to-bare-fn.rs:5:13
4 LL | let x = foo as extern "C" fn() -> isize;
5 | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
7 = note: an `as` expression can only be used to convert between primitive types. Consider using the `From` trait
9 error[E0605]: non-primitive cast: `u64` as `fn(isize) -> (isize, isize)`
10 --> $DIR/cast-to-bare-fn.rs:7:13
12 LL | let y = v as extern "Rust" fn(isize) -> (isize, isize);
13 | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
15 = note: an `as` expression can only be used to convert between primitive types. Consider using the `From` trait
17 error: aborting due to 2 previous errors
19 For more information about this error, try `rustc --explain E0605`.