std::char_traits

 

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Strings biblioteca

Terminadas en nulo 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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Clases 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

Las funciones miembro 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 en la cabecera <string>
template<     class CharT > class char_traits;

La clase char_traits define la secuencia y propiedades de cadena de funcionamiento de un tipo de carácter, tales como los tipos utilizados para la manipulación de los caracteres y cadenas de caracteres, así como todas las operaciones comunes para el tipo de personaje 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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Hay char_traits clase de plantilla definida, que sirve como base para instanciaciones explícitas. Cumple con todos los requisitos del concepto 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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Además, varias especializaciones se definen para la mayoría de los tipos de caracteres comunes que lo que tiene que especificar los siguientes miembros:

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 miembros

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	un tipo entero que puede contener todos los valores de char_type más 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	' Definido por la implantación 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	' Definido por la implantación 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	' Definido por la implantación 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.

Las funciones miembro

assign [estático]	asigna un carácter 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. (función miembro público estático)
eqlt [estático]	compara dos caracteres 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. (función miembro público estático)
move [estático]	mueve una secuencia de caracteres a otra 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. (función miembro público estático)
copy [estático]	copia una secuencia 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. (función miembro público estático)
compare [estático]	lexicográfico compara dos secuencias 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. (función miembro público estático)
length [estático]	devuelve la longitud de una secuencia 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. (función miembro público estático)
find [estático]	finds a character in a character sequence (función miembro público estático)
to_char_type [estático]	int_type convierte a char_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. (función miembro público estático)
to_int_type [estático]	char_type convierte a int_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. (función miembro público estático)
eq_int_type [estático]	compara dos 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. (función miembro público estático)
eof [estático]	devuelve un 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. (función miembro público estático)
not_eof [estático]	comprueba si un carácter es 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. (función miembro público estático)

Ejemplo

Definidas por el usuario rasgos de carácter se puede utilizar para proporcionar 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> {
    static bool eq(char c1, char c2) {
         return std::toupper(c1) == std::toupper(c2);
     }
    static bool ne(char c1, char c2) {
         return std::toupper(c1) != std::toupper(c2);
     }
    static bool lt(char c1, char c2) {
         return std::toupper(c1) <  std::toupper(c2);
    }
    static int compare(const char* s1, const char* s2, size_t n) {
        while( n-- != 0 ) {
            if( std::toupper(*s1) < std::toupper(*s2) ) return -1;
            if( std::toupper(*s1) > std::toupper(*s2) ) return 1;
            ++s1; ++s2;
        }
        return 0;
    }
    static const char* find(const char* s, int n, char a) {
        while( n-- > 0 && std::toupper(*s) != std::toupper(a) ) {
            ++s;
        }
        return s;
    }
};
 
typedef std::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";
}

Salida:

Hello and heLLo are equal

Ver también

basic_string

almacena y manipula secuencias 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. (plantilla de clase)