CODEWITHSUNDEEP
rustrust-macros
Finlay Weber
Finlay Weber

Reputation: 4163

Are all Rust attributes Macros?

Are all attributes in Rust implemented as Macros? Or some native attributes are created specially by the compiler/language and does not use the Macros mechanism?

If there are attributes not created via Macros, how do I identify them?

Upvotes: 3

Views: 241

Answers (1)

Chayim Friedman
Chayim Friedman

Reputation: 70970

There are many attributes that are not macros and are treated specifically by the compiler. Examples: #[cfg] (although this one can be considered as a macro, even if not implemented as one), #[repr], #[doc], #[allow(...)]/#[warn(...)]/#[deny(...)]/#[forbid(...)], and many more.

I don't know a way to identify such attributes except to look at the list of builtin macro attributes and see if they're there.

Upvotes: 2

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