impl_opaque/
lib.rs

1#![no_std]
2#![doc = include_str!("../README.md")]
3
4pub use impl_opaque_macro::opaque;
5
6#[doc(hidden)]
7pub mod __private {
8    #[derive(Clone, Copy)]
9    pub struct Opaque;
10
11    #[macro_export]
12    #[doc(hidden)]
13    macro_rules! field {
14        ($vis:vis $name:ident : $ty:ty = $expr:expr) => {
15            $crate::field!()
16        };
17
18        () => {
19            compile_error!("cannot use field macro outside of impl block")
20        };
21    }
22}