Per Vognsen on Nostr: nprofile1q…8cc5z Rust has a similar issue with proc macros (as opposed to pattern ...

nprofile1qy2hwumn8ghj7un9d3shjtnddaehgu3wwp6kyqpqsrcgh979ychudzrha7asxa7kvennpghghzzadmv5gcunfw5p72qsx8cc5z (nprofile…cc5z) Rust has a similar issue with proc macros (as opposed to pattern matching macros). A proc macro is essentially just a token stream transformer so it has to do its own parsing if it wants to process Rust syntax as opposed to some other made-up syntax. And since the compiler itself does not provide that (mainly to avoid exposing the internal compiler APIs) you have to use a third party package for that like syn.