hi,
the following doesn't work
struct Struct;
impl Struct {
fn five(input: &str) -> i32 {5}
const N: i32 = five("give me five");
}
the compiler error is cannot find function
five in this scope
what's the right way to use associated functions in the definition of associated constants?
struct Struct;
impl Struct {
const fn five(input: &str) -> i32 { 5 }
const N: i32 = Self::five("give me five");
}
1 Like
@quinedot what should I do if I have to use ?
in the function definition?
The return type of my function is a Result<>
now I got
`?` is not allowed in a `const fn`
Some control flow is in stable now, but not ?
. You try can unrolling the match or similar:
let value = match foo {
// you may have to map or coerce the error in addition
Err(err) => return Err(err),
Ok(val) => val,
};
n.b. E0744 appears somewhat outdated, I'll file a bug.
1 Like
(A documentation fix is already in the pipeline.)
2 Likes
system
Closed
6
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