Enum rustc_trait_selection::traits::WellFormedLoc

source · [−]
pub enum WellFormedLoc {
    Ty(LocalDefId),
    Param {
        function: LocalDefId,
        param_idx: u16,
    },
}
Expand description

The ‘location’ at which we try to perform HIR-based wf checking. This information is used to obtain an hir::Ty, which we can walk in order to obtain precise spans for any ‘nested’ types (e.g. Foo in Option<Foo>).

Variants

Ty(LocalDefId)

Use the type of the provided definition.

Param

Fields

function: LocalDefId

The function to lookup the parameter in

param_idx: u16

The index of the parameter to use. Parameters are indexed from 0, with the return type being the last ‘parameter’

Use the type of the parameter of the provided function. We cannot use hir::Param, since the function may not have a body (e.g. a trait method definition)

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: 8 bytes

Size for each variant:

  • Ty: 6 bytes
  • Param: 6 bytes