Enum rustc_hir::LifetimeName[][src]

pub enum LifetimeName {
    Param(ParamName),
    Implicit,
    ImplicitObjectLifetimeDefault,
    Error,
    Underscore,
    Static,
}

Variants

Param(ParamName)

User-given names or fresh (synthetic) names.

Implicit

User wrote nothing (e.g., the lifetime in &u32).

ImplicitObjectLifetimeDefault

Implicit lifetime in a context like dyn Foo. This is distinguished from implicit lifetimes elsewhere because the lifetime that they default to must appear elsewhere within the enclosing type. This means that, in an impl Trait context, we don’t have to create a parameter for them. That is, impl Trait<Item = &u32> expands to an opaque type like type Foo<'a> = impl Trait<Item = &'a u32>, but impl Trait<item = dyn Bar> expands to type Foo = impl Trait<Item = dyn Bar + 'static>. The latter uses ImplicitObjectLifetimeDefault so that surrounding code knows not to create a lifetime parameter.

Error

Indicates an error during lowering (usually '_ in wrong place) that was already reported.

Underscore

User wrote specifies '_.

Static

User wrote 'static.

Implementations

Trait Implementations

Returns a copy of the value. Read more

Performs copy-assignment from source. Read more

Formats the value using the given formatter. Read more

Feeds this value into the given Hasher. Read more

Feeds a slice of this type into the given Hasher. Read more

This method tests for self and other values to be equal, and is used by ==. Read more

This method tests for !=.

Auto Trait Implementations

Blanket Implementations

Gets the TypeId of self. Read more

Immutably borrows from an owned value. Read more

Mutably borrows from an owned value. Read more

Performs the conversion.

Performs the conversion.

The resulting type after obtaining ownership.

Creates owned data from borrowed data, usually by cloning. Read more

🔬 This is a nightly-only experimental API. (toowned_clone_into)

recently added

Uses borrowed data to replace owned data, usually by cloning. Read more

The type returned in the event of a conversion error.

Performs the conversion.

The type returned in the event of a conversion error.

Performs the conversion.

Layout

Note: Most layout information is completely unstable and may be different between compiler versions and platforms. The only exception is types with certain repr(...) attributes. Please see the Rust Reference’s “Type Layout” chapter for details on type layout guarantees.

Size: 16 bytes