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Document rustc_ast::Extern variants

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This commit is contained in:
Manish Goregaokar 2023-01-02 14:25:24 -08:00
parent b7bc90fea3
commit 3c7c694e73
1 changed files with 11 additions and 0 deletions
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11
compiler/rustc_ast/src/ast.rs
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@ -2705,8 +2705,19 @@ impl Item {
/// `extern` qualifier on a function item or function type. /// `extern` qualifier on a function item or function type.
#[derive(Clone, Copy, Encodable, Decodable, Debug)] #[derive(Clone, Copy, Encodable, Decodable, Debug)]
pub enum Extern { pub enum Extern {
/// No explicit extern keyword was used
///
/// E.g. `fn foo() {}`
None, None,
/// An explicit extern keyword was used, but with implicit ABI
///
/// E.g. `extern fn foo() {}`
///
/// This is just `extern "C"` (see `rustc_target::spec::abi::Abi::FALLBACK`)
Implicit(Span), Implicit(Span),
/// An explicit extern keyword was used with an explicit ABI
///
/// E.g. `extern "C" fn foo() {}`
Explicit(StrLit, Span), Explicit(StrLit, Span),
} }