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Defer is_syn_full() call until first expression

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David Tolnay 2024-11-04 11:29:37 -05:00
parent c92ac9940b
commit 7daf1b169d
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1 changed files with 2 additions and 2 deletions
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4
impl/src/fmt.rs
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@ -138,7 +138,7 @@ fn explicit_named_args(input: ParseStream) -> Result<Set<Ident>> {
}
fn try_explicit_named_args(input: ParseStream) -> Result<Set<Ident>> {
let syn_full = is_syn_full();
let mut syn_full = None;
let mut named_args = Set::new();
while !input.is_empty() {
@ -151,7 +151,7 @@ fn try_explicit_named_args(input: ParseStream) -> Result<Set<Ident>> {
input.parse::<Token![=]>()?;
named_args.insert(ident);
}
if syn_full {
if *syn_full.get_or_insert_with(is_syn_full) {
let ahead = input.fork();
if ahead.parse::<Expr>().is_ok() {
input.advance_to(&ahead);