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std::ctype

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< cpp‎ | locale

 
 
Localizaciones biblioteca
Locales y facetas
Original:
Locales and facets
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locale
Carácter clasificación
Original:
Character classification
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Conversiones
Original:
Conversions
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Facet clases categoría base
Original:
Facet category base classes
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Categorías faceta
Original:
Facet categories
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Específico de la localidad facetas
Original:
Locale-specific facets
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Facetas código de conversión
Original:
Code conversion facets
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codecvt_utf8(C++11)
codecvt_utf16(C++11)
C locale
Original:
C locale
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std::ctype
Las funciones miembro
Original:
Member functions
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ctype::ctype
ctype::~ctype
ctype::is
ctype::do_is
ctype::scan_id
ctype::do_scan_id
ctype::scan_not
ctype::do_scan_not
ctype::toupper
ctype::do_toupper
ctype::tolower
ctype::do_tolower
ctype::widen
ctype::do_widen
ctype::narrow
ctype::do_narrow
 
Defined in header <locale>
template< class CharT >
class ctype;
Clase ctype encapsula rasgos de carácter de clasificación. Todas las operaciones realizadas a través de flujo de entrada std::basic_istream<charT> utilizar el std::ctype<charT> de la configuración regional imbuida en la corriente de identificar espacios en blanco para tokenización entrada. Las operaciones de flujo de salida se aplican a std::ctype<charT>::widen() estrechas caracteres argumentos antes de la salida .
Original:
Class ctype encapsulates character classification features. All stream input operations performed through std::basic_istream<charT> use the std::ctype<charT> of the locale imbued in the stream to identify whitespace characters for input tokenization. Stream output operations apply std::ctype<charT>::widen() to narrow-character arguments prior to output.
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cpp/locale/ctype basecpp/locale/locale/facetstd-ctype-inheritance.svg
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Inheritance diagram

Dos especializaciones son proporcionados por la biblioteca estándar
Original:
Two specializations are provided by the standard library
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Defined in header <locale>
std::ctype<char>
proporciona equivalentes de la clasificación "C" locale. Esta especialización se utiliza para consultar la tabla de clasificación de caracteres
Original:
provides equivalents of the "C" locale classification. This specialization uses table lookup for character classification
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std::ctype<wchar_t>
proporciona equivalentes de carácter ancho de la clasificación "C" locale
Original:
provides wide character equivalents of the "C" locale classification
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Contenido

[editar] Tipos de miembros

Miembro de tipo
Original:
Member type
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Definition
char_type CharT

[editar] Las funciones miembro

construye una nueva faceta ctype
Original:
constructs a new ctype facet
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(miembro público función)
destructs una faceta ctype
Original:
destructs a ctype facet
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(protegidos función miembro)
Invoca do_is
Original:
invokes do_is
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(miembro público función) [edit]
Invoca do_scan_is
Original:
invokes do_scan_is
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(miembro público función) [edit]
Invoca do_scan_not
Original:
invokes do_scan_not
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(miembro público función) [edit]
Invoca do_toupper
Original:
invokes do_toupper
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(miembro público función) [edit]
Invoca do_tolower
Original:
invokes do_tolower
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(miembro público función) [edit]
Invoca do_widen
Original:
invokes do_widen
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(miembro público función) [edit]
Invoca do_narrow
Original:
invokes do_narrow
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(miembro público función) [edit]

[editar] Protegido funciones miembro

[virtual]
clasifica un carácter o una secuencia de caracteres
Original:
classifies a character or a character sequence
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(virtuales protegidos miembro de función) [edit]
[virtual]
localiza el primer carácter en una secuencia que se ajusta a la clasificación dada
Original:
locates the first character in a sequence that conforms to given classification
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(virtuales protegidos miembro de función) [edit]
[virtual]
localiza el primer carácter en una secuencia que no givne clasificación
Original:
locates the first character in a sequence that fails givne classification
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(virtuales protegidos miembro de función) [edit]
[virtual]
convierte un carácter o los caracteres a mayúsculas
Original:
converts a character or characters to uppercase
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(virtuales protegidos miembro de función) [edit]
[virtual]
convierte un carácter o caracteres en minúsculas
Original:
converts a character or characters to lowercase
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(virtuales protegidos miembro de función) [edit]
[virtual]
convierte un carácter o caracteres de char a charT
Original:
converts a character or characters from char to charT
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(virtuales protegidos miembro de función) [edit]
[virtual]
convierte un carácter o caracteres de charT a char
Original:
converts a character or characters from charT to char
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(virtuales protegidos miembro de función) [edit]

[editar] Objetos miembros

static std::locale::id id
Identificador de la configuración regional
Original:
id of the locale
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(objeto miembro del público)

Inherited from std::ctype_base

Member types

Tipo
Original:
Type
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Definition
mask
Tipo de máscara de bits sin especificar (enumeración, de tipo entero, o bitset)
Original:
unspecified bitmask type (enumeration, integer type, or bitset)
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Member constants

space
[estático]
el valor de mask clasificación de caracteres Identificar espacios en blanco
Original:
the value of mask identifying whitespace character classification
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(público miembro constante estática)
print
[estático]
el valor de mask identificación de clasificación de caracteres imprimibles
Original:
the value of mask identifying printable character classification
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(público miembro constante estática)
cntrl
[estático]
el valor de mask identificación de clasificación de caracteres de control
Original:
the value of mask identifying control character classification
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(público miembro constante estática)
upper
[estático]
el valor de mask identificación de clasificación de caracteres en mayúscula
Original:
the value of mask identifying uppercase character classification
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(público miembro constante estática)
lower
[estático]
el valor de mask identificación de clasificación de caracteres en minúsculas
Original:
the value of mask identifying lowercase character classification
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(público miembro constante estática)
alpha
[estático]
el valor de mask identificación de clasificación de caracteres alfabéticos
Original:
the value of mask identifying alphabetic character classification
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(público miembro constante estática)
digit
[estático]
el valor de mask identificación de clasificación de caracteres dígitos
Original:
the value of mask identifying digit character classification
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(público miembro constante estática)
punct
[estático]
el valor de mask identificación de clasificación de caracteres puntuacion
Original:
the value of mask identifying punctuation character classification
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(público miembro constante estática)
xdigit
[estático]
el valor de mask identificar clasificación hexadecimal dígito
Original:
the value of mask identifying hexadecimal digit character classification
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(público miembro constante estática)
blank
[estático] (C++11)
el valor de mask identificación de clasificación de caracteres en blanco
Original:
the value of mask identifying blank character classification
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(público miembro constante estática)
alnum
[estático]
alpha | digit
(público miembro constante estática)
graph
[estático]
alnum | punct
(público miembro constante estática)

[editar] Ejemplo

El ejemplo siguiente muestra la modificación de un ctype que no sea <char> ctype para dividir un archivo CSV
Original:
The following example demonstrates modification of a ctype other than ctype<char> to tokenize of a CSV file
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#include <iostream>
#include <locale>
#include <sstream>
 
struct csv_whitespace : std::ctype<wchar_t> {
    bool do_is(mask m, char_type c) const
    {   
        if ((m & space) && c == L' ') {
            return false; // space will NOT be classified as whitespace
        }
        if ((m & space) && c == L',') {
            return true; // comma will be classified as whitespace
        }
        return ctype::do_is(m, c); // leave the rest to the parent class
    } 
};
 
int main()
{
    std::wstring in = L"Column 1,Column 2,Column 3\n123,456,789";
    std::wstring token;
 
    std::wcout << "default locale:\n";
    std::wistringstream s1(in);
    while (s1 >> token) {
        std::wcout << "  " << token << '\n';
    }
 
    std::wcout << "locale with modified ctype:\n";
    std::wistringstream s2(in);
    s2.imbue(std::locale(s2.getloc(), new csv_whitespace()));
    while (s2 >> token) {
        std::wcout << "  " << token<< '\n';
    }
}

Output:

default locale:
  Column
  1,Column
  2,Column
  3
  123,456,789
locale with modified ctype:
  Column 1
  Column 2
  Column 3
  123
  456
  789

[editar] Ver también

especialización de std::ctype para char tipo
Original:
specialization of std::ctype for type char
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(clase de especialización de plantilla)
define las categorías de clasificación de caracteres
Original:
defines character classification categories
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(clase de plantilla)
crea una faceta ctype para la localidad nombrada
Original:
creates a ctype facet for the named locale
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(clase de plantilla)