Struct InstanceArg 

pub struct InstanceArg {
    pub descriptor: Option<&'static TypeDescriptor>,
    pub sample: Option<GcRef>,
}

One per-instance type argument a value records.

descriptor is what the payload stores — None when the collection was never told its element type (a null element descriptor, which every praxis_*_new wrapper accepts as “unknown”). sample is a live value that argument describes, when the payload holds one; recursing into it recovers nested arguments a descriptor alone cannot (Vec[Vec[Int]]).

Fields

descriptor: Option<&'static TypeDescriptor>

The descriptor the payload records for this argument position.

sample: Option<GcRef>

A live value of this argument’s type, if the value holds one.

Trait Implementations

impl Clone for InstanceArg

fn clone(&self) -> InstanceArg

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for InstanceArg