#### ???

??? |

##### Formal Signature

Note that the formal name of the iter has been changed to replace the exclamation mark iter symbol to a name acceptable to vdm tools.

##### Pre-condition

pre

##### Post-condition

This post-condition makes use of the history concept from vdm++ (see the vdm dialect notes).

post

##### Quit condition

For quit actions see the specificatiion of the quit statement.

errs QUIT :