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ast: make ForeignItemKind an alias of AssocItemKind

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This commit is contained in:
Mazdak Farrokhzad 2020-02-15 02:34:19 +01:00
parent 35884fe168
commit 91110fda27
1 changed files with 3 additions and 30 deletions
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33
src/libsyntax/ast.rs
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@ -2600,35 +2600,8 @@ pub fn generics(&self) -> Option<&Generics> {
}
}
pub type ForeignItem = Item<ForeignItemKind>;
/// An item within an `extern` block.
#[derive(Clone, RustcEncodable, RustcDecodable, Debug)]
pub enum ForeignItemKind {
/// A constant, `const $ident: $ty $def?;` where `def ::= "=" $expr? ;`.
/// If `def` is parsed, then the constant is provided, and otherwise required.
Const(P<Ty>, Option<P<Expr>>),
/// A static item (`static FOO: u8`).
Static(P<Ty>, Mutability, Option<P<Expr>>),
/// A function.
Fn(FnSig, Generics, Option<P<Block>>),
/// A type.
TyAlias(Generics, GenericBounds, Option<P<Ty>>),
/// A macro expanding to an item.
Macro(Mac),
}
impl ForeignItemKind {
pub fn descriptive_variant(&self) -> &str {
match *self {
ForeignItemKind::Fn(..) => "foreign function",
ForeignItemKind::Const(..) => "foreign const item",
ForeignItemKind::Static(..) => "foreign static item",
ForeignItemKind::TyAlias(..) => "foreign type",
ForeignItemKind::Macro(..) => "macro in foreign module",
}
}
}
pub type ForeignItem = Item<AssocItemKind>;
pub type ForeignItemKind = AssocItemKind;
/// Represents associated items.
/// These include items in `impl` and `trait` definitions.
@ -2646,7 +2619,7 @@ pub struct AssocItem {
pub tokens: Option<TokenStream>,
}
/// Represents various kinds of content within an `impl`.
/// Represents non-free item kinds.
///
/// The term "provided" in the variants below refers to the item having a default
/// definition / body. Meanwhile, a "required" item lacks a definition / body.