composing

Tools to compose functions

This library exports two macros, [compose_expr] and [compose_fn], which allow to easily compose expressions and functions respectively.

They both support right-to-left and left-to-right composition.

Examples

```rust use composing::*;

fn plusone(x: i32) -> i32 { x + 1 } fn timestwo(x: i32) -> i32 { x * 2 } fn tostring(x: i32) -> String { x.tostring() }

let composition = composefn!(tostring, plusone, timestwo); assert_eq!(composition(17), "35");

let composition = composefn!(timestwo => plusone => tostring); assert_eq!(composition(17), "35"); ```