Incorrect built-in functions list about varnish-book HOT 8 CLOSED

call, set, unset and return cause Varnish to perform specific actions, therefore they are not keywords, but instructions. I agree that they are not functions.

Text updated in commit c4d2b8f

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This is what is called keywords in any other languages.

IMO there is no need to create another naming.

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I checked the definition of instruction in book The Art of Computer Programming by Knuth D. I think the word keyword can be confusing because it can represent commands, parameters or reserved names.

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That's actually the case. You cannot use those in parameters and you cannot create variables called after any of them.

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In the book we say that action in return(action) is a keyword. I think it is important to differentiate their type. Otherwise, we are saying that the keyword return has the keyword action as argument.

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Why? actions are keywords as well. return is probably the most universal keyword of all.

You are creating an issue where there is none.

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I agree with @fgsch, keyword is a good fit that probably anyone would understand in both contexts. By the way, a keyword doesn't have to be a reserved word too, it's just the case most of the time.

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Ok, I see that keyword is the appropriate term here. Text updated in 22a64af. Thanks for the discussion.

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