std::formattable
Min standard notice:
Header: <format>
The concept formattable specifies that std::formatter<std::remove_cvref_t
# Declarations
template< class T, class CharT >
concept formattable = /* formattable_with */<
std::remove_reference_t<T>,
std::basic_format_context</* fmt_iter_for */<CharT>, CharT>
>;
(since C++23)
Helper templates
template< class CharT >
using /* fmt_iter_for */ = /* unspecified */;
(exposition only*)
template< class T, class Context,
class Formatter =
typename Context::template
formatter_type<std::remove_const_t<T>> >
concept /* formattable_with */ =
std::semiregular<Formatter> &&
requires (Formatter& f, const Formatter& cf, T&& t, Context fc,
std::basic_format_parse_context<
typename Context::char_type
> pc) {
{ f.parse(pc) } -> std::same_as<typename decltype(pc)::iterator>;
{ cf.format(t, fc) } -> std::same_as<typename Context::iterator>;
};
(exposition only*)
# Defect reports
| DR | Applied to | Behavior as published | Correct behavior |
|---|---|---|---|
| LWG 3925 | C++23 | the second template argument of std::basic_format_context was not provided | provided |