Function magnus::call_super

pub fn call_super<A, T>(args: A) -> Result<T, Error>
where
    A: ArgList,
    T: TryConvert,

Call the super method of the current method context.

Returns Ok(T) if the super method exists and returns without error, and the return value converts to a T, or returns Err if there is no super method, the super method raises or the conversion fails.

Panics

Panics if called from a non-Ruby thread. See Ruby::call_super for the non-panicking version.

Examples

use magnus::{call_super, define_class, eval, function, prelude::*, rb_assert, Error};

let a = eval(
    r#"
      class A
        def example
          "Hello from A"
        end
      end
      A
    "#,
)
.unwrap();

let b = define_class("B", a).unwrap();
fn example() -> Result<String, Error> {
    let s: String = call_super(())?;
    Ok(format!("{}, and hello from B", s))
}
b.define_method("example", function!(example, 0)).unwrap();

rb_assert!(r#"B.new.example == "Hello from A, and hello from B""#)