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cppdraft/format/fmt/string.md

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+[format.fmt.string]
+
+# 28 Text processing library [[text]](./#text)
+
+## 28.5 Formatting [[format]](format#fmt.string)
+
+### 28.5.4 Class template basic_format_string [format.fmt.string]
+
+namespace std {template<class charT, class... Args>struct [basic_format_string](#lib:basic_format_string "28.5.4 Class template basic_­format_­string [format.fmt.string]") {private: basic_string_view<charT> *str*; // *exposition only*public:template<class T> consteval basic_format_string(const T& s);
+ basic_format_string(*runtime-format-string*<charT> s) noexcept : str(s.*str*) {}constexpr basic_string_view<charT> get() const noexcept { return *str*; }};}
+
+[🔗](#itemdecl:1)
+
+`template<class T> consteval basic_format_string(const T& s);
+`
+
+[1](#1)
+
+[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/text.tex#L6680)
+
+*Constraints*: const T& models [convertible_to](concept.convertible#concept:convertible_to "18.4.4 Concept convertible_­to [concept.convertible]")<basic_string_view<charT>>[.](#1.sentence-1)
+
+[2](#2)
+
+[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/text.tex#L6684)
+
+*Effects*: Direct-non-list-initializes *str* with s[.](#2.sentence-1)
+
+[3](#3)
+
+[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/text.tex#L6688)
+
+*Remarks*: A call to this function is not a core constant expression ([[expr.const]](expr.const "7.7 Constant expressions"))
+unless there exist args of types Args such that *str* is a format string for args[.](#3.sentence-1)