pezkuwichain/serde
1
0
Fork 0
mirror of https://github.com/pezkuwichain/serde.git synced 2026-06-14 05:51:01 +00:00
Code Issues Packages Projects Releases Wiki Activity

Deduplicate token stream respanner

Browse Source
This commit is contained in:
David Tolnay
2021-01-24 23:01:50 -08:00
parent 033114a4ae
commit 1f423580a5
3 changed files with 20 additions and 37 deletions
Download Patch File Download Diff File Expand all files Collapse all files
serde_derive/src/internals/attr.rs
+3 -17
View File
@@ -1,6 +1,7 @@
use internals::respan::respan;
use internals::symbol::*;
use internals::{ungroup, Ctxt};
use proc_macro2::{Group, Spacing, Span, TokenStream, TokenTree};
use proc_macro2::{Spacing, Span, TokenStream, TokenTree};
use quote::ToTokens;
use std::borrow::Cow;
use std::collections::BTreeSet;
@@ -1949,20 +1950,5 @@ where
fn spanned_tokens(s: &syn::LitStr) -> parse::Result<TokenStream> {
let stream = syn::parse_str(&s.value())?;
Ok(respan_token_stream(stream, s.span()))
}
fn respan_token_stream(stream: TokenStream, span: Span) -> TokenStream {
stream
.into_iter()
.map(|token| respan_token_tree(token, span))
.collect()
}
fn respan_token_tree(mut token: TokenTree, span: Span) -> TokenTree {
if let TokenTree::Group(g) = &mut token {
*g = Group::new(g.delimiter(), respan_token_stream(g.stream(), span));
}
token.set_span(span);
token
Ok(respan(stream, s.span()))
}