pqxx::internal::enum_traits< ENUM > Struct Template Reference

Helper class for defining enum conversions. More...

#include <strconv.hxx>

Public Types
using	impl_type = std::underlying_type_t< ENUM >
using	impl_traits = string_traits< impl_type >

Static Public Member Functions
static constexpr zview	to_buf (char *begin, char *end, ENUM const &value)
static constexpr char *	into_buf (char *begin, char *end, ENUM const &value)
static ENUM	from_string (std::string_view text)
static std::size_t	size_buffer (ENUM const &value) noexcept

Static Public Attributes
static constexpr bool	converts_to_string {true}
static constexpr bool	converts_from_string {true}

Detailed Description

template<typename ENUM>
struct pqxx::internal::enum_traits< ENUM >

Helper class for defining enum conversions.

The conversion will convert enum values to numeric strings, and vice versa.

To define a string conversion for an enum type, derive a string_traits specialisation for the enum from this struct.

There's usually an easier way though: the PQXX_DECLARE_ENUM_CONVERSION macro. Use enum_traits manually only if you need to customise your traits type in more detail.

Member Typedef Documentation

impl_traits

template<typename ENUM >

using pqxx::internal::enum_traits< ENUM >::impl_traits = string_traits<impl_type>

impl_type

template<typename ENUM >

using pqxx::internal::enum_traits< ENUM >::impl_type = std::underlying_type_t<ENUM>

Member Function Documentation

from_string()

template<typename ENUM >

static ENUM pqxx::internal::enum_traits< ENUM >::from_string ( std::string_view  text )

static

References pqxx::string_traits< TYPE >::from_string(), and pqxx::text.

into_buf()

template<typename ENUM >

static constexpr char* pqxx::internal::enum_traits< ENUM >::into_buf ( char *  begin, char *  end, ENUM const &  value  )

staticconstexpr

References pqxx::string_traits< TYPE >::into_buf().

size_buffer()

template<typename ENUM >

static std::size_t pqxx::internal::enum_traits< ENUM >::size_buffer ( ENUM const &  value )

staticnoexcept

References pqxx::string_traits< TYPE >::size_buffer().

to_buf()

template<typename ENUM >

static constexpr zview pqxx::internal::enum_traits< ENUM >::to_buf ( char *  begin, char *  end, ENUM const &  value  )

staticconstexpr

References pqxx::string_traits< TYPE >::to_buf().

Member Data Documentation

converts_from_string

template<typename ENUM >

constexpr bool pqxx::internal::enum_traits< ENUM >::converts_from_string {true}

staticconstexpr

converts_to_string

template<typename ENUM >

constexpr bool pqxx::internal::enum_traits< ENUM >::converts_to_string {true}

staticconstexpr

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The documentation for this struct was generated from the following file:

• strconv.hxx