Enum rustc_resolve::late::RibKind

pub(crate) enum RibKind<'a> {
    Normal,
    AssocItem,
    ClosureOrAsync,
    Item(HasGenericParams),
    ConstantItem(ConstantHasGenerics, Option<(Ident, ConstantItemKind)>),
    Module(Module<'a>),
    MacroDefinition(DefId),
    ForwardGenericParamBan,
    ConstParamTy,
    InlineAsmSym,
}

The rib kind restricts certain accesses, e.g. to a Res::Local of an outer item.

Variants

Normal

No restriction needs to be applied.

AssocItem

We passed through an impl or trait and are now in one of its methods or associated types. Allow references to ty params that impl or trait binds. Disallow any other upvars (including other ty params that are upvars).

ClosureOrAsync

We passed through a closure. Disallow labels.

Item(HasGenericParams)

We passed through an item scope. Disallow upvars.

ConstantItem(ConstantHasGenerics, Option<(Ident, ConstantItemKind)>)

We’re in a constant item. Can’t refer to dynamic stuff.

The item may reference generic parameters in trivial constant expressions. All other constants aren’t allowed to use generic params at all.

Module(Module<'a>)

We passed through a module.

MacroDefinition(DefId)

We passed through a macro_rules! statement

ForwardGenericParamBan

All bindings in this rib are generic parameters that can’t be used from the default of a generic parameter because they’re not declared before said generic parameter. Also see the visit_generics override.

ConstParamTy

We are inside of the type of a const parameter. Can’t refer to any parameters.

InlineAsmSym

We are inside a sym inline assembly operand. Can only refer to globals.

Implementations

impl RibKind<'_>

pub(crate) fn contains_params(&self) -> bool

Whether this rib kind contains generic parameters, as opposed to local variables.

fn is_label_barrier(self) -> bool

This rib forbids referring to labels defined in upwards ribs.

Trait Implementations

impl<'a> Clone for RibKind<'a>

fn clone(&self) -> RibKind<'a>

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<'a> Debug for RibKind<'a>

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<'a> Copy for RibKind<'a>

Layout

Note: Most layout information is completely unstable and may even differ between compilations. 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: 24 bytes

Size for each variant:

• Normal: 0 bytes
• AssocItem: 0 bytes
• ClosureOrAsync: 0 bytes
• Item: 15 bytes
• ConstantItem: 19 bytes
• Module: 15 bytes
• MacroDefinition: 11 bytes
• ForwardGenericParamBan: 0 bytes
• ConstParamTy: 0 bytes
• InlineAsmSym: 0 bytes