3 releases
0.1.2 | Apr 13, 2019 |
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0.1.1 | Apr 7, 2019 |
0.1.0 | Apr 7, 2019 |
#21 in #flatten
Used in 2 crates
6KB
64 lines
Loosen
Declares a derive-like function attr macro which creates another wrap-like function with single tuple-loosened argument, retrieved from the former function.
Upon call, the loosened function propagates the call with the flattened input tuple as arguments to the original function.
Example
# extern crate loosen;
# use loosen::loose;
#
# pub struct A;
# pub struct B;
#
#[loose]
fn fa(a: A, b: B) {}
// normal call
fa(A, B);
// loose call
let args = (A, B);
fa_loose(args);
// ie. instead of two arguments,
// there is only a single tuple argument
// another usage exaple
(0..10)
.map(|_| (A, B))
.map(fa_loose)
.collect::<Vec<_>>();
Note
This is a draft and is my first try on proc-macros. I suggested this as an rfc before realising a proc macro would suffice: https://github.com/rust-lang/rfcs/issues/2667
Dependencies
~2MB
~46K SLoC