As others have said, this is code. In my experience, folks writing code come to need a VCS ("oops, didn't mean to change that"), a debugger ("why did it do tha

As others have said, this is code. In my experience, folks writing code come to need a VCS ("oops, didn't mean to change that"), a debugger ("why did it do that?"), a test environment ("what happens if I change that"), and perhaps an audit trail ("who changed that?"). Set against that, the effort required to parse expressions is trivial.