anchor.diff:  (export 'jsc-value-is-null)
   
   (defcfun "jsc_value_new_number" (g-object jsc-value)
  -  (context (g-object jsc-context)))
  +  (context (g-object jsc-context))
  +  (number :double))
   (export 'jsc-value-new-number)
   
   (defcfun "jsc_value_is_number" :boolean
  
positive.code: (export 'jsc-value-to-int32)
  
  (defcfun "jsc_value_new_boolean" (g-object jsc-value)
    (context (g-object jsc-context)))
  (export 'jsc-value-new-boolean)
  
  (defcfun "jsc_value_is_boolean" :boolean
  
negative.code:   (callback :pointer) ;; XXX: GCallback
    (user-data :pointer)
    (destroy-notify :pointer) ;; XXX: GDestroyNotify
    (return-type :pointer))
  (export 'jsc-value-new-function-variadic)
  
  (defcfun "jsc_value_function_callv" (g-object jsc-value)
  