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Diffstat (limited to '')
-rw-r--r-- | vendor/serde_derive/src/internals/respan.rs | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/vendor/serde_derive/src/internals/respan.rs b/vendor/serde_derive/src/internals/respan.rs new file mode 100644 index 000000000..dcec7017b --- /dev/null +++ b/vendor/serde_derive/src/internals/respan.rs @@ -0,0 +1,16 @@ +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 +} |