Macro tiny_fn::tiny_fn

macro_rules! tiny_fn {
    ($(
        $(#[$meta:meta])*
        $vis:vis struct $name:ident $(< $($t:ident),+ >)? =
        $fun:ident ($(
            $arg_name:ident: $arg_type:ty
        ),* $(,)?)
        $( -> $ret:ty)?
        $(| $(+ $markers:path)+)?
        ;
    )*) => { ... };
}

Defines new structure type. This type will be constructible from any closure that implement specified Fn* trait. Closures that fits into inline storage will be placed there. Otherwise closure will be boxed. And it will have call method with the same signature as the closure.

Defined type can have generic parameters that can be used in function signature. It will always have additional const INLINE_SIZE: usize generic parameter, that controls size of the inline storage. Alignment of the inline storage is hardcoded to 16 which is enough for any primitive type and thus fits most of the types.