rust/tests/ui/rfcs/rfc-3348-c-string-literals/auxiliary/count.rs

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2023-07-23 05:09:43 -05:00
// force-host
// edition: 2018
// no-prefer-dynamic
#![crate_type = "proc-macro"]
extern crate proc_macro;
use proc_macro::TokenStream;
use std::str::FromStr;
#[proc_macro]
pub fn number_of_tokens(_: TokenStream) -> TokenStream {
TokenStream::from_str("c\"\"").unwrap().into_iter().count().to_string().parse().unwrap()
}