MistyClosures

Marginally less opaque closures.

Specifically, a MistyClosure comprises an OpaqueClosure paired with the IRCode that defines it. This is useful if you generate an OpaqueClosure, and want to be able to retrieve the IRCode later on.

Recommended Use

# Get the `IRCode` associated with `sin(5.0)`.
ir = Base.code_ircode_by_type(Tuple{typeof(sin), Float64}) |> only |> first;
ir.argtypes[1] = Tuple{}

# Produce a `MistyClosure` using it. All kwargs are passed to the `OpaqueClosure`
# constructor.
mc = MistyClosure(ir; do_compile=true)

# Call it.
mc(5.0) == sin(5.0)

Alternative Use

Sometimes you'll already have an OpaqueClosure lying around, and not want to produce a new one from an IRCode (as this often takes a surprisingly large amount of time). If this is the case, you can simply use the default constructor for MistyClosure. That is, write

mc = MistyClosure(existing_opaque_closure, ir)

Of course, it is your responsibility to ensure that ir and existing_opaque_closure are in agreement.