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Add Item::attrs to get the attributes of an item if available #1281

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Add Item::attrs to get the attributes of an item if available #1281

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26 changes: 26 additions & 0 deletions src/item.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -347,6 +347,32 @@ impl Item {
_ => unreachable!(),
}
}

#[cfg(feature = "parsing")]
pub fn attrs(&self) -> Option<&Vec<Attribute>> {
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@jf2048 jf2048 Feb 15, 2023

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I have a similar implementation of this in a crate here: parse_attributes.rs#L336

I was able to have it simply return &[Attribute], and for Item::Verbatim it just returns &[]. Not sure if that is better or not.

match self {
Item::ExternCrate(ItemExternCrate { attrs, .. })
| Item::Use(ItemUse { attrs, .. })
| Item::Static(ItemStatic { attrs, .. })
| Item::Const(ItemConst { attrs, .. })
| Item::Fn(ItemFn { attrs, .. })
| Item::Mod(ItemMod { attrs, .. })
| Item::ForeignMod(ItemForeignMod { attrs, .. })
| Item::Type(ItemType { attrs, .. })
| Item::Struct(ItemStruct { attrs, .. })
| Item::Enum(ItemEnum { attrs, .. })
| Item::Union(ItemUnion { attrs, .. })
| Item::Trait(ItemTrait { attrs, .. })
| Item::TraitAlias(ItemTraitAlias { attrs, .. })
| Item::Impl(ItemImpl { attrs, .. })
| Item::Macro(ItemMacro { attrs, .. })
| Item::Macro2(ItemMacro2 { attrs, .. }) => Some(attrs),
Item::Verbatim(_) => None,

#[cfg(syn_no_non_exhaustive)]
_ => unreachable!(),
}
}
}

impl From<DeriveInput> for Item {
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