Behavioral Design Patterns in C++ - Boolean Interpreter - III

The lecture discusses the implementation of design patterns by converting terminal and non-terminal expressions into classes, allowing easy modification and extension of grammar rules. It introduces the use of smart pointers to prevent memory leaks and demonstrates adding an OR expression to the interpreter. The lecture concludes with testing the new implementation and highlighting the flexibility of the interpreter pattern.

What is the main advantage of converting terminal and non-terminal expressions into classes?

• It improves the readability of the code.

• It allows for easy modification and extension of grammar rules.

• It makes the code run faster.

• It reduces the size of the code.

Why are smart pointers used in place of regular pointers?

• To reduce the number of lines of code.

• To avoid memory leaks.

• To increase the speed of execution.

• To make the code more readable.

What is the first step in replacing pointers with smart pointers?

• Rewrite the entire codebase.

• Delete all existing pointers.

• Create an alias for an expression smart pointer.

• Use a different programming language.

How does the OR expression affect the return value of an expression?

• It returns true if at least one operand is true.

• It always returns false.

• It has no effect on the return value.

• It returns true only if both operands are true.

What is the similarity between the OR and AND expression clauses?

• Both involve creating a new class.

• Both are implemented using the same method.

• Both require extending the interpret method.

• Both require a complete rewrite of the code.