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Merge pull request #358 from dtolnay/conflict

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Further deconflict macro-generated format var names with user-provided ones
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David Tolnay 2024-11-04 22:11:33 -05:00 • committed by GitHub
commit e1fa5190b4
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1 changed files with 4 additions and 1 deletions
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5
impl/src/fmt.rs
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@ -78,7 +78,7 @@ impl Display<'_> {
}
_ => continue,
};
let formatvar = match &member {
let mut formatvar = match &member {
MemberUnraw::Unnamed(index) => IdentUnraw::new(format_ident!("__field{}", index)),
MemberUnraw::Named(ident) => {
if user_named_args.contains(ident) || ident == "_" {
@ -89,6 +89,9 @@ impl Display<'_> {
IdentUnraw::new(format_ident!("__field_{}", ident.to_string()))
}
};
while user_named_args.contains(&formatvar) {
formatvar = IdentUnraw::new(format_ident!("_{}", formatvar.to_string()));
}
out += &formatvar.to_string();
if !macro_named_args.insert(member.clone()) {
// Already added to scope by a previous use.