Standard library header <codecvt> (C++11)(deprecated in C++17)(removed in C++26)

 

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Algorithms <algorithm> <numeric> Strings <cctype> <cstring> <cuchar>(C++11) <cwchar> <cwctype> <string_view>(C++17) <string> Text processing <clocale> <codecvt>(C++11/17/26*) <locale> <regex>(C++11) <text_encoding>(C++26)    Numerics <cfenv>(C++11) <cmath> <complex> <linalg>(C++26) <numbers>(C++20) <random>(C++11) <simd>(C++26) <stdckdint.h>(C++26) <valarray> Time <chrono>(C++11) <ctime> C compatibility <ccomplex>(C++11/17/20*) <ciso646>(until C++20) <cstdalign>(C++11/17/20*) <cstdbool>(C++11/17/20*) <ctgmath>(C++11/17/20*)

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This header is part of the text processing library.

Classes
codecvt_utf8 (C++11)(deprecated in C++17)(removed in C++26)	converts between UTF-8 and UCS-2/UCS-4 (class template)
codecvt_utf16 (C++11)(deprecated in C++17)(removed in C++26)	converts between UTF-16 and UCS-2/UCS-4 (class template)
codecvt_utf8_utf16 (C++11)(deprecated in C++17)(removed in C++26)	converts between UTF-8 and UTF-16 (class template)
codecvt_mode (C++11)(deprecated in C++17)(removed in C++26)	tags to alter behavior of the standard codecvt facets (enum)

Notes

<codecvt> is deprecated in C++17 and removed in C++26 (see P2871R3).

The reason for removal is that this feature no longer implements the current Unicode Standard, supporting only the obsolete UCS-2 encoding.

Synopsis

namespace std {enum codecvt_mode { consume_header =4, generate_header =2, little_endian =1};   template<class Elem, unsignedlong Maxcode =0x10ffff, codecvt_mode Mode =(codecvt_mode)0>class codecvt_utf8;   template<class Elem, unsignedlong Maxcode =0x10ffff, codecvt_mode Mode =(codecvt_mode)0>class codecvt_utf16;   template<class Elem, unsignedlong Maxcode =0x10ffff, codecvt_mode Mode =(codecvt_mode)0>class codecvt_utf8_utf16;}

Class std::codecvt_utf8

namespace std {template<class Elem, unsignedlong Maxcode =0x10ffff, codecvt_mode Mode =(codecvt_mode)0>class codecvt_utf8 :public codecvt<Elem, char, mbstate_t>{public:explicit codecvt_utf8(size_t refs =0); ~codecvt_utf8();};}

Class std::codecvt_utf16

namespace std {template<class Elem, unsignedlong Maxcode =0x10ffff, codecvt_mode Mode =(codecvt_mode)0>class codecvt_utf16 :public codecvt<Elem, char, mbstate_t>{public:explicit codecvt_utf16(size_t refs =0); ~codecvt_utf16();};}

Class std::codecvt_utf8_utf16

namespace std {template<class Elem, unsignedlong Maxcode =0x10ffff, codecvt_mode Mode =(codecvt_mode)0>class codecvt_utf8_utf16 :public codecvt<Elem, char, mbstate_t>{public:explicit codecvt_utf8_utf16(size_t refs =0); ~codecvt_utf8_utf16();};}