## Annotation Glossary

### A

allow-none

  NULL is OK, both for passing and for returning.

### E

element-type

  Generics and defining elements of containers and arrays.

### I

inout

  Parameter for input and for returning results. Default is transfer full.

### O

out

  Parameter for returning results. Default is transfer full.

out callee-allocates

  Out parameter, where callee must allocate storage.

### S

scope async

  The callback is valid until first called.

### T

transfer container

  Free data container after the code is done.

transfer floating

  Alias for transfer none, used for objects with floating refs.

transfer full

  Free data after the code is done.

transfer none

  Don't free data after the code is done.