Function const_ 

pub fn const_<T, R>(r: R) -> impl FnOnce(T) -> R

Returns a function that discards its argument and always returns r.

use toad_common::*;

fn try_get_string() -> Result<String, std::io::Error> {
}

fn do_stuff() -> Result<String, std::io::Error> {
  try_get_string().map(const_("it worked!".to_string())) // equivalent to:
                  .map(|_| "it worked!".to_string())
}