proc-macro3

defines a macro that imports either from proc_macro or proc-macro2 depending on the proc-macro2 feature flag.

Examples

proc_macro3::import!(); // creates a module named 'proc_macro'
use proc_macro::TokenStream; // uses from the newly created module

fn uses_token_steam(input: TokenStream) -> TokenStream {
    in_some_way(input)
}