Let Business Write Business Logic
summary
Builds a constrained rule language so business users edit decision logic as strings that get lexed and parsed into an AST and evaluated to a boolean. Uses Erlang’s leex and yecc (bundled with Elixir) to implement a boolean template language with variables, and, not, precedence and a safe evaluator that rejects invalid expressions. Prototype runs at a veterinary startup for appointment surveys, mostly successful though dirty clinic data once triggered an embarrassing reminder.
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chapters (7)
- 0:00Introduction and background
- 3:21The business problem
- 6:13Defining the solution
- 11:54Lexer and parser concepts
- 14:36Building the implementation
- 24:33Extending the logic
- 30:21Community and conclusion
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