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Simplify finding of repr(packed) attributes

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David Tolnay 2020-05-09 23:01:47 -07:00
parent 548eb8f667
commit da8d6f678e
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GPG Key ID: F9BA143B95FF6D82
1 changed files with 8 additions and 18 deletions
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26
serde_derive/src/internals/attr.rs
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@ -593,25 +593,15 @@ impl Container {
}
}
use proc_macro2::Delimiter;
let is_packed = item.attrs.iter().any(|attr| match attr.style {
syn::AttrStyle::Outer => {
attr.path
.get_ident()
.map_or(false, |ident| *ident == "repr")
&& syn::parse2::<Group>(attr.tokens.clone())
.ok()
.filter(|g| g.delimiter() == Delimiter::Parenthesis)
.map(|g| g.stream().to_string())
.map_or(false, |repr| {
let repr = repr.trim();
repr == "packed"
|| repr.starts_with("packed(")
|| repr.starts_with("packed ")
})
let mut is_packed = false;
for attr in &item.attrs {
if attr.path.is_ident("repr") {
let _ = attr.parse_args_with(|input: ParseStream| {
is_packed |= input.parse::<Ident>()? == "packed";
Ok(())
});
}
_ => false,
});
}
Container {
name: Name::from_attrs(unraw(&item.ident), ser_name, de_name, None),