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opt

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nora 2022-09-25 14:41:29 +02:00
parent 8a57db3409
commit dec361efa9
1 changed files with 10 additions and 1 deletions
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11
src/opts.rs
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@ -8,6 +8,13 @@ pub enum Alignment {
Unknown,
}
mod sealed {
pub trait SealedOpts {}
impl SealedOpts for () {}
impl<O: super::FmtOpts> SealedOpts for &'_ O {}
}
macro_rules! options {
(
$(
@ -21,7 +28,7 @@ macro_rules! options {
)*
) => {
// FIXME: We can get rid of this Copy can't we
pub trait FmtOpts: Copy {
pub trait FmtOpts: sealed::SealedOpts + Copy {
#[doc(hidden)]
type Inner: FmtOpts;
@ -103,6 +110,8 @@ macro_rules! options {
#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
pub struct $with_name<I, $($(const $const_gen_name: $with_ty),*)?>(#[doc(hidden)] pub I);
impl<I: FmtOpts, $($(const $const_gen_name: $with_ty),*)?> sealed::SealedOpts for $with_name<I, $($($const_gen_name),*)?> {}
impl<I: FmtOpts, $($(const $const_gen_name: $with_ty),*)?> FmtOpts for $with_name<I, $($($const_gen_name),*)?> {
type Inner = I;