module Crystal
Overview
Here lies the logic of the representation of the MixedUnionType.
Which structure is used to represent them is defined in LLVMTyper#create_llvm_type.
The #union_type_and_value_pointer will allow to read the current value of the union.
The #store*_in_union operations allow to write the value in a unions.
The #{assign|downcast|upcast}_distinct_union_types operation matches the
semantics described in ./casts.cr
Together these operations should encapsulate the binary representation of the MixedUnionType.
Other unions like ReferenceUnionType that have a more trivial representation are not handled here.