plumbum::pipe!

macro_rules! pipe {

    (let $p: pat = $e: expr ; $( $t: tt )*) => (
        { let $p = $e ; pipe! { $( $t )* } }
    );

    (let $p: ident : $ty: ty = $e: expr ; $( $t: tt )*) => (
        { let $p: $ty = $e ; pipe! { $( $t )* } }
    );

    (for $p: pat = $e: expr ; $( $t: tt )*) => (
        $crate::ConduitM::and_then($e, move |$p| pipe! { $( $t )* } )
    );

    (for $p: ident : $ty: ty = $e: expr ; $( $t: tt )*) => (
        $crate::ConduitM::and_then($e, move |$p : $ty| pipe! { $( $t )* } )
    );

    ($e: expr ; $( $t: tt )*) => (
        $crate::ConduitM::and_then($e, move |_| pipe! { $( $t )* } )
    );

    (return $e: expr) => (From::from($e));

    ($e: expr) => ($e);

    () => (From::from(()));

}

Provides a convient syntax for conduit operations.

Example

#[macro_use] extern crate plumbum;
use plumbum::*;
fn main() {
    let src = pipe!{
        produce(42);
        produce(43);
    };
    let sink = pipe!{
        for x = consume();
        for y = consume();
        return x.unwrap_or(0) + y.unwrap_or(0)
    };
    assert_eq!(src.connect(sink), 85);
}