[Issue 23441] importc: array length macro preprocessed with cpp doesn't compile

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=23441

Walter Bright <bugzilla at digitalmars.com> changed:

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                 CC|                            |bugzilla at digitalmars.com

--- Comment #5 from Walter Bright <bugzilla at digitalmars.com> ---
(In reply to kinke from comment #2)
> That NK_LEN macro apparently makes use of a weird special syntax to get the
> length of a C array, see the last 'notes' paragraph in
> https://en.cppreference.com/w/c/language/sizeof.

The cite says:

"Number of elements in any array a including VLA (since C99) may be determined
with the expression sizeof a / sizeof a[0]. Note that if a has pointer type
(such as after array-to-pointer conversion of function parameter type
adjustment), this expression would simply divide the number of bytes in a
pointer type by the number of bytes in the pointed type."

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