nibblecode_derive 0.1.0

Derive macros for nibblecode
Documentation 
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// Code in this file is taken whole or in part from serde:
// https://github.com/serde-rs/serde
// The original license for this code is included in LICENSE

use proc_macro2::{Group, Span, TokenStream, TokenTree};

pub(crate) fn respan(stream: TokenStream, span: Span) -> TokenStream {
	stream
		.into_iter()
		.map(|token| respan_token(token, span))
		.collect()
}

fn respan_token(mut token: TokenTree, span: Span) -> TokenTree {
	if let TokenTree::Group(g) = &mut token {
		*g = Group::new(g.delimiter(), respan(g.stream(), span));
	}
	token.set_span(span);
	token
}