CODEWITHSUNDEEP
cc-preprocessor
iblue
iblue

Reputation: 30404

Check if an expression is an lvalue with the preprocessor

Is there a macro which checks if an expression is a lvalue (meaning I can do &expression) using the C preprocessor?

Example: If there is some int a; and I call IS_LVALUE(a) it should evaluate to 1, while IS_LVALUE(5) should evaluate to 0, so I can do #if IS_LVALUE(...) == 1

Upvotes: 2

Views: 320

Answers (1)

Quentin
Quentin

Reputation: 63124

No.

Because the C preprocessor has no clue what an lvalue is, or any other C construct for that matter. That's the compiler's job.

Were you in C++ you could use a type trait, but in C I'm afraid you're out of luck.

Upvotes: 11

Related Questions