## Macro: COMMON-LISP:UNLESS
[![package](https://img.shields.io/badge/Package-COMMON--LISP-5f9ea0.svg?style=social&colorA=999999)](../) [![type](https://img.shields.io/badge/Type-Macro-5f9ea0.svg?style=social&colorA=999999)](../#macro) [![clhs](https://img.shields.io/badge/CLHS-UNLESS-5f9ea0.svg?style=social&colorA=999999)](http://www.lispworks.com/documentation/HyperSpec/Body/m_when_.htm) 

> If the first argument is not true, the rest of the forms are
> evaluated as a PROGN.

### Lambda list
```cl
(sb-impl::test &body sb-impl::forms)
```