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Document some of the AST nodes #106383

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merged 2 commits into from
Jan 3, 2023
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Merged

Document some of the AST nodes #106383

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3c7c694
Document rustc_ast::Extern variants
Manishearth Jan 2, 2023
157211f
Document rustc_ast::FnHeader fields
Manishearth Jan 2, 2023
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Document rustc_ast::Extern variants
@Manishearth
Manishearth committed Jan 2, 2023

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commit 3c7c694e734b6bcc41663eaf230a7f26c19de0f4
11 changes: 11 additions & 0 deletions compiler/rustc_ast/src/ast.rs
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Original file line number Diff line number Diff line change
@@ -2705,8 +2705,19 @@ impl Item {
/// `extern` qualifier on a function item or function type.
#[derive(Clone, Copy, Encodable, Decodable, Debug)]
pub enum Extern {
/// No explicit extern keyword was used
///
/// E.g. `fn foo() {}`
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),
/// An explicit extern keyword was used with an explicit ABI
///
/// E.g. `extern "C" fn foo() {}`
Explicit(StrLit, Span),
}