27.1.6.7 C enums

This form defines enum types.

<enum-type> → (enum (<ident> <string>)… …)

Let us suppose the type:

(type enum
   (enum (id_1 name_1)
         ...
         (id_n name_n)))

Bigloo creates the following functions:

• Creators:

  (enum-id_1::enum)
  ...
  (enum-id_n::enum)
  

  These functions create enum values.

• A type checker:

  (enum?::bool obj::obj)
  

  This function returns #t if the argument obj is of type enum and #f otherwise.

• An equality checker:

  (=enum?::bool ::enum ::enum)
  

  This function returns #t if the arguments are equal and #f otherwise.

Here is an example of Scheme code using enum type.

(module foo
   (extern
    (type gizmo
          (enum (titi "titi")
                (tutu "tutu")
                (tata "tata"))
          "enum toto")))

(let ((v1 (gizmo-titi))
      (v2 (gizmo-tutu)))
   (print (=gizmo? v1 v2)))

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