| Andrew Walbran | d1b91c7 | 2020-08-11 17:12:08 +0100 | [diff] [blame^] | 1 | use proc_macro2::{Span, TokenStream}; |
| 2 | use quote::ToTokens; |
| 3 | use syn::parse::Parse; |
| 4 | |
| 5 | pub(crate) fn respan<T>(node: &T, span: Span) -> T |
| 6 | where |
| 7 | T: ToTokens + Parse, |
| 8 | { |
| 9 | let tokens = node.to_token_stream(); |
| 10 | let respanned = respan_tokens(tokens, span); |
| 11 | syn::parse2(respanned).unwrap() |
| 12 | } |
| 13 | |
| 14 | fn respan_tokens(tokens: TokenStream, span: Span) -> TokenStream { |
| 15 | tokens |
| 16 | .into_iter() |
| 17 | .map(|mut token| { |
| 18 | token.set_span(span); |
| 19 | token |
| 20 | }) |
| 21 | .collect() |
| 22 | } |