This module encapsulates some logic for upvalue handling, which is relevant to both thunks (delayed computations for lazy-evaluation) as well as closures (lambdas that capture variables from the surrounding scope).
The upvalues of a scope are whatever data are needed at runtime in order to resolve each free variable in the scope to a value. “Upvalue” is a term taken from Lua.
- Structure for carrying upvalues of an UpvalueCarrier. The implementation of this struct encapsulates the logic for capturing and accessing upvalues.