Behavioral Design Patterns in C++ - Boolean Evaluator

The lecture covers implementing a lexer and parser without using the interpreter design pattern. It starts with setting up a project and creating two functions: one for the lexer and another for the parser. The lexer uses C++ string streams to tokenize input, while the parser evaluates boolean expressions. The lecture concludes by discussing the limitations of the current implementation and suggests refactoring using the Interpreter Design Pattern for better flexibility and maintainability.

What are the two main functions that need to be added for the lexer and parser implementation?

Describe the purpose of the lexer in the context of this implementation.

What does the parser function return, and what is its significance?

Explain how the implementation checks if a token can be converted into a number.

What happens if one of the operands in the expression is 0?

How would you modify the parser to support a new operator, such as OR?

What is the significance of using the Interpreter Design Pattern in this implementation?