## Macro: SB-EXT:WITH-CURRENT-SOURCE-FORM
[![package](https://img.shields.io/badge/Package-SB--EXT-5f9ea0.svg?style=social&colorA=999999)](../) [![type](https://img.shields.io/badge/Type-Macro-5f9ea0.svg?style=social&colorA=999999)](../#macro) 

> In a macroexpander, indicate that FORMS are being processed by BODY.
> 
> FORMS are usually sub-forms of the whole form passed to the expander.
> 
> If more than one form is supplied, FORMS should be ordered by
> specificity, with the most specific form first. This allows the
> compiler to try and obtain a source path using subsequent elements of
> FORMS if it fails for the first one.
> 
> Indicating the processing of sub-forms lets the compiler report
> precise source locations in case conditions are signaled during the
> execution of BODY.
> 
> NOTE: This interface is experimental and subject to change.

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