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#![feature(let_chains)]
extern crate proc_macro;
use proc_macro::{Delimiter, TokenStream, TokenTree};
#[proc_macro_attribute]
pub fn norepr(_: TokenStream, input: TokenStream) -> TokenStream {
let mut tokens = vec![];
let mut tts = input.into_iter().fuse().peekable();
loop {
let Some(token) = tts.next() else { break };
if let TokenTree::Punct(punct) = &token
&& punct.as_char() == '#'
{
if let Some(TokenTree::Group(group)) = tts.peek()
&& let Delimiter::Bracket = group.delimiter()
&& let Some(TokenTree::Ident(ident)) = group.stream().into_iter().next()
&& ident.to_string() == "repr"
{
let _ = tts.next();
// skip '#' and '[repr(..)]
} else {
tokens.push(token);
}
} else {
tokens.push(token);
}
}
tokens.into_iter().collect()
}
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