[format.range.fmtstr]

# 28 Text processing library [[text]](./#text)

## 28.5 Formatting [[format]](format#range.fmtstr)

### 28.5.7 Formatting of ranges [[format.range]](format.range#fmtstr)

#### 28.5.7.6 Specialization of *range-default-formatter* for strings [format.range.fmtstr]

[ð](#lib:range-default-formatter)

namespace std {template<range_format K, ranges::[input_range](range.refinements#concept:input_range "25.4.6 Other range refinements [range.refinements]") R, class charT>requires (K == range_format::string || K == range_format::debug_string)struct *range-default-formatter*<K, R, charT> {private: formatter<basic_string<charT>, charT> *underlying_*; // *exposition only*public:template<class ParseContext>constexpr typename ParseContext::iterator
 parse(ParseContext& ctx); template<class FormatContext>typename FormatContext::iterator
 format(*see below*& str, FormatContext& ctx) const; };}

[1](#1)

[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/text.tex#L8373)

*Mandates*: [same_as](concept.same#concept:same_as "18.4.2 Concept same_­as [concept.same]")<remove_cvref_t<range_reference_t<R>>, charT> is true[.](#1.sentence-1)

[ð](#lib:parse,range-default-formatter)

`template<class ParseContext>
  constexpr typename ParseContext::iterator
    parse(ParseContext& ctx);
`

[2](#2)

[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/text.tex#L8386)

*Effects*: Equivalent to:auto i = *underlying_*.parse(ctx);if constexpr (K == range_format::debug_string) {*underlying_*.set_debug_format();}return i;

[ð](#lib:format,range-default-formatter)

`template<class FormatContext>
  typename FormatContext::iterator
    format(see below& r, FormatContext& ctx) const;
`

[3](#3)

[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/text.tex#L8406)

The type of r is const R& if ranges​::​[input_range](range.refinements#concept:input_range "25.4.6 Other range refinements [range.refinements]")<const R> is true andR& otherwise[.](#3.sentence-1)

[4](#4)

[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/text.tex#L8411)

*Effects*: Let *s* be a basic_string<charT> such thatranges​::​equal(*s*, r) is true[.](#4.sentence-1)

Equivalent to: return *underlying_*.format(*s*, ctx);
