std::char_traits

 

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Strings terminadas Original: Null-terminated strings The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

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Classes Original: Classes The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

basic_string

char_traits

 

std::char_traits

Funções de membro Original: Member functions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

char_traits::assign

char_traits::cmp

char_traits::move

char_traits::copy

char_traits::compare

char_traits::length

char_traits::find

char_traits::to_char_type

char_traits::to_int_type

char_traits::eq_int_type

char_traits::eof

char_traits::not_eof

 

Definido no cabeçalho <string>
template<     class CharT >class char_traits;

A classe char_traits define o fluxo e as propriedades de operação de cadeia de um tipo de caráter, tais como os tipos usados ​​para manipular os personagens e seqüências de caracteres, bem como todas as operações das comuns para o tipo de personagem dado.

Original:

The char_traits class defines the stream and string operation properties of a character type, such as the types used for manipulating the characters and character strings, as well as all the common operations for the given character type.

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Há char_traits classe modelo definido, que serve como uma base para instanciações explícitos. Ele preenche todos os requisitos do conceito Traits.

Original:

There is class template char_traits defined, which serves as a basis for explicit instantiations. It fulfills all requirements of Traits concept.

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Além disso, várias especializações são definidas para a maioria dos tipos de personagens comuns que que tem de especificar os seguintes membros:

Original:

Also, several specializations are defined for most common character types which which has to specify the following members:

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Instantiation	char_type	int_type	off_type	pos_type	state_type
char_traits<char>	char	int	streamoff	streampos	mbstate_t
char_traits<wchar_t>	wchar_t	wint_t	wstreamoff	wstreampos	mbstate_t
char_traits<char16_t>(C++11)	char16_t	int_least16_t	streamoff	u16streampos	mbstate_t
char_traits<char32_t>(C++11)	char32_t	int_least32_t	streamoff	u32streampos	mbstate_t

Tipos de membro

Tipo Original: Type The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.	Definition
char_type	CharT
int_type	um tipo inteiro que pode conter todos os valores de char_type mais EOF Original: an integer type that can hold all values of char_type plus EOF The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
off_type	Definida pela implementação Original: implementation-defined The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
pos_type	Definida pela implementação Original: implementation-defined The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
state_type	Definida pela implementação Original: implementation-defined The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

Funções de membro

assign [estática]	atribui um caráter Original: assigns a character The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (função public static membro)
eq lt [estática]	compara dois personagens Original: compares two characters The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (função public static membro)
move [estática]	move uma seqüência de caracteres para outro Original: moves one character sequence onto another The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (função public static membro)
copy [estática]	copia uma seqüência de caracteres Original: copies a character sequence The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (função public static membro)
compare [estática]	lexicographically compara duas sequências de caracteres Original: lexicographically compares two character sequences The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (função public static membro)
length [estática]	retorna o comprimento de uma sequência de caracteres Original: returns the length of a character sequence The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (função public static membro)
find [estática]	finds a character in a character sequence (função public static membro)
to_char_type [estática]	converte a int_typechar_type equivalente Original: converts int_type to equivalent char_type The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (função public static membro)
to_int_type [estática]	converte a char_typeint_type equivalente Original: converts char_type to equivalent int_type The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (função public static membro)
eq_int_type [estática]	compara dois valores int_type Original: compares two int_type values The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (função public static membro)
eof [estática]	retorna um valor' eof Original: returns an eof value The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (função public static membro)
not_eof [estática]	verifica se um personagem é eof valor Original: checks whether a character is eof value The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (função public static membro)

Exemplo

Traços de carácter definidos pelo utilizador podem ser usados ​​para fornecer case-insensitive comparison

Original:

User-defined character traits may be used to provide case-insensitive comparison

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#include <string>#include <iostream>#include <cctype>   struct ci_char_traits :public std::char_traits<char>{staticbool eq(char c1, char c2){returnstd::toupper(c1)==std::toupper(c2);}staticbool ne(char c1, char c2){returnstd::toupper(c1)!=std::toupper(c2);}staticbool lt(char c1, char c2){returnstd::toupper(c1)<std::toupper(c2);}staticint compare(constchar* s1, constchar* s2, size_t n){while( n--!=0){if(std::toupper(*s1)<std::toupper(*s2))return-1;if(std::toupper(*s1)>std::toupper(*s2))return1;++s1;++s2;}return0;}staticconstchar* find(constchar* s, int n, char a){while( n-->0&&std::toupper(*s)!=std::toupper(a)){++s;}return s;}};   typedefstd::basic_string<char, ci_char_traits> ci_string;   std::ostream& operator<<(std::ostream& os, const ci_string& str){return os.write(str.data(), str.size());}   int main(){ ci_string s1 ="Hello"; ci_string s2 ="heLLo";if(s1 == s2)std::cout<< s1 <<" and "<< s2 <<" are equal\n";}

Saída:

Hello and heLLo are equal

Veja também

basic_string	lojas e manipula seqüências de caracteres Original: stores and manipulates sequences of characters The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (modelo de classe)