Variables' prefixes

Prefix

.

is used for type variables:

T Error
   String message

   F (message)
      .message = message

Prefix

:

is used for global variables:

V global_var = 0

F global_func()
   :global_var++

Prefixes

@

and

@=

are used for captured variables:

F global_func()
   V i = 0

   F local_func()
      @i++ // `i` is captured by reference

F get_f(a)
   F f(b)
      R @=a + b // `a` is captured by copy
   R f