Enum rustc_const_eval::interpret::validity::PathElem

source · 
pub enum PathElem {
    Field(Symbol),
    Variant(Symbol),
    GeneratorState(VariantIdx),
    CapturedVar(Symbol),
    ArrayElem(usize),
    TupleElem(usize),
    Deref,
    EnumTag,
    GeneratorTag,
    DynDowncast,
}
Expand description

We want to show a nice path to the invalid field for diagnostics, but avoid string operations in the happy case where no error happens. So we track a Vec<PathElem> where PathElem contains all the data we need to later print something for the user.

Variants

Field(Symbol)

Variant(Symbol)

GeneratorState(VariantIdx)

CapturedVar(Symbol)

ArrayElem(usize)

TupleElem(usize)

Deref

EnumTag

GeneratorTag

DynDowncast

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

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

Returns the argument unchanged.

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

The resulting type after obtaining ownership.
Creates owned data from borrowed data, usually by cloning. Read more
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 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: 16 bytes

Size for each variant:

  • Field: 4 bytes
  • Variant: 4 bytes
  • GeneratorState: 4 bytes
  • CapturedVar: 4 bytes
  • ArrayElem: 12 bytes
  • TupleElem: 12 bytes
  • Deref: 0 bytes
  • EnumTag: 0 bytes
  • GeneratorTag: 0 bytes
  • DynDowncast: 0 bytes