Crate prog1 [−] [src]
Execute a block after computing a result.
This crate provides the macro prog1
, an implementation of the homonymous
Common Lisp macro.
It allows to compute a result, before executing a block that changes values previously used to compute the result.
Examples
#[macro_use] extern crate prog1; fn main() { let mut a = 0; assert_eq!(prog1!(a; { a += 1 }), 0); assert_eq!(a, 1); }
Macros
prog1 |
Executes $after after computing the result $result. |