Refactoring pdi datatype c++
Refactor Data_type to more idiomatic C++ and support a evaluate call to freeze value references
Fixes #43 (closed), Solves #33 (closed) and Solves #51 (closed)
Refactor Data_type to more idiomatic C++ and support a evaluate call to freeze value references
Fixes #43 (closed), Solves #33 (closed) and Solves #51 (closed)