On Thu Aug 28, 2025 at 8:39 AM CEST, Alice Ryhl wrote:
> On Fri, Aug 15, 2025 at 7:32 AM Jesung Yang <y.j3m...@gmail.com> wrote:
>> + (@proc $v:ident $span:ident == $($tt:tt)*) => {
>> + $v.push(::proc_macro::TokenTree::Punct(
>> + ::proc_macro::Punct::new('=', ::proc_macro::Spacing::Joint)
>> + ));
>> + $v.push(::proc_macro::TokenTree::Punct(
>> + ::proc_macro::Punct::new('=', ::proc_macro::Spacing::Alone)
>> + ));
>> + quote_spanned!(@proc $v $span $($tt)*);
>
> Not a blocker, but if the way to implement this one is to push =
> twice, then I think the pattern should just be a single = and then you
> push a = once. The pattern can match twice to handle ==.
You can't do that, since the first one needs the `Joint` spacing and the
second one the `Alone` one. `==` also is a single token in macro input,
so matching only on `=` doesn't work.
---
Cheers,
Benno
