Enum FoldArg 

pub enum FoldArg {
    Leaf(usize, bool),
    Build(Box<FoldBuild>),
}

One constructor-parameter input of a FoldVariant.

Variants

Leaf(usize, bool)

Decode the flat wire leaf at this index into FoldPlan::leaves.

The bool is the passthrough marker for selector-dispatched arms: false = the leaf is Option-wrapped by selector presence and is unwrapped before the constructor call (a missing input is an error); true = the constructor argument is itself an Option<…>, so the leaf keeps the argument’s own type and passes through unwrapped (None is a legitimate value for the taken arm — arm-taken-ness is decided by the selector alone). Always false outside dispatched arms.

Build(Box<FoldBuild>)

Build this parameter by recursively folding its own default constructor (the parameter’s type is itself a ptr_class with a default input). Its leaves live in the shared flat FoldPlan::leaves.

Trait Implementations

impl Clone for FoldArg

fn clone(&self) -> FoldArg

Returns a duplicate of the value.

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

Performs copy-assignment from source.