error arg-count

Неверное число аргументов.

What it means#

The call passes fewer or more arguments than the function has parameters (§6.1). Parameters with default values and a variadic last parameter ...xs: T may be omitted or repeated; all other parameters must be supplied.

Example#

fn add(a: i32, b: i32) -> i32 => a + b

fn main() {
  let s = add(1)      // <- arg-count
}

arg-count

How to fix#

fn add(a: i32, b: i32) -> i32 => a + b

fn main() {
  let s = add(1, 2)
}

Pass every required argument, or give the missing parameter a default value in the declaration (b: i32 = 0).

See also#

• named-arg
• type-mismatch
• not-callable