partial_application
This crate contains the partial!
macro which allows partial application of a function.
Calling partial!(some_fn => arg0, _, arg2, _)
will return the closure
|x1, x3| some_fn(arg0, x1, arg1, x3)
.
Move closures can be created by adding move
in front of the function: partial!(move ..)
#[macro_use]
extern crate partial_application;
fn foo(a: i32, b: i32, c: i32, d: i32, mul: i32, off: i32) -> i32 {
(a + b*b + c.pow(3) + d.pow(4)) * mul - off
}
fn main() {
let bar = partial!(foo => _, _, 10, 42, 10, 10);
assert_eq!(
foo(15, 15, 10, 42, 10, 10),
bar(15, 15)
);
}