[depr.format.syn]

# Annex D (normative) Compatibility features [[depr]](./#depr)

## D.20 Deprecated formatting [[depr.format]](depr.format#syn)

### D.20.1 Header <format> synopsis [depr.format.syn]

[1](#1)

[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/future.tex#L750)

The header [<format>](format.formatter.spec#header:%3cformat%3e "28.5.6.4 Formatter specializations [format.formatter.spec]") has the following additions:

namespace std {template<class Visitor, class Context>decltype(auto) visit_format_arg(Visitor&& vis, basic_format_arg<Context> arg);}