Practice Pass By Name (the 'macro-like' Substitution - Historical Context) (6.1.3)
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Pass by Name (The 'Macro-like' Substitution - Historical Context)

Practice - Pass by Name (The 'Macro-like' Substitution - Historical Context)

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Question 1

What can happen if 'side effects' are involved in the actual argument expression when using 'pass by name'?
* Type: mcq
* Options: The program will always crash, The parameter's "value" will become fixed, It can lead to surprising and subtle bugs, Performance will significantly improve.
* Correct Answer: It can lead to surprising and subtle bugs
* Explanation: The text notes that "dynamic re-evaluation makes it extremely difficult to reason about and debug, especially when side effects are involved."
* Hint: Changes outside the immediate operation can lead to unexpected problems.

The program will always crash
The parameter's "value" will become fixed
It can lead to surprising and subtle bugs
Performance will significantly improve. * **Correct Answer**: It can lead to surprising and subtle bugs * **Explanation**: The text notes that "dynamic re-evaluation makes it extremely difficult to reason about and debug
especially when side effects are involved." * **Hint**: Changes outside the immediate operation can lead to unexpected problems. ---

💡 Hint: Changes outside the immediate operation can lead to unexpected problems. ---

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