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c8c691ff
编写于
3月 13, 2022
作者:
C
Camille GILLOT
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compiler/rustc_ast_lowering/src/lib.rs
compiler/rustc_ast_lowering/src/lib.rs
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compiler/rustc_ast_lowering/src/lib.rs
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@@ -129,19 +129,15 @@ struct LoweringContext<'a, 'hir: 'a> {
/// written at all (e.g., `&T` or `std::cell::Ref<T>`).
anonymous_lifetime_mode
:
AnonymousLifetimeMode
,
/// Used to create lifetime definitions from in-band lifetime usages.
/// e.g., `fn foo(x: &'x u8) -> &'x u8` to `fn foo<'x>(x: &'x u8) -> &'x u8`
/// When a named lifetime is encountered in a function or impl header and
/// has not been defined
/// (i.e., it doesn't appear in the in_scope_lifetimes list), it is added
/// Used to create lifetime definitions for anonymous lifetimes.
/// When an anonymous lifetime is encountered in a function or impl header and
/// requires to create a fresh lifetime parameter, it is added
/// to this list. The results of this list are then added to the list of
/// lifetime definitions in the corresponding impl or function generics.
lifetimes_to_define
:
Vec
<
(
Span
,
NodeId
)
>
,
/// `true` if in-band lifetimes are being collected. This is used to
/// indicate whether or not we're in a place where new lifetimes will result
/// in in-band lifetime definitions, such a function or an impl header,
/// including implicit lifetimes from `impl_header_lifetime_elision`.
/// If anonymous lifetimes are being collected, this field holds the parent
/// `LocalDefId` to create the fresh lifetime parameters' `LocalDefId`.
is_collecting_anonymous_lifetimes
:
Option
<
LocalDefId
>
,
/// Currently in-scope lifetimes defined in impl headers, fn headers, or HRTB.
...
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