fn collect_meta_vars(content_stream: TokenStream) -> Vec<Ident>🔬This is a nightly-only experimental API. (
proc_macro_internals)Expand description
Helper function to support macro repetitions like $( CONTENTS ) SEP_OPT * in quote!.
Recursively collects all Idents (meta-variables) that follow a $
from the given CONTENTS stream, preserving their order of appearance.