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std::ctype<div class="t-tr-text"><char><div class="t-tr-dropdown"><div><div><div class="t-tr-dropdown-arrow-border"></div><div class="t-tr-dropdown-arrow"></div><div class="t-tr-dropdown-h">Original:</div><div class="t-tr-dropdown-orig"><char></div><div class="t-tr-dropdown-notes">The text has been machine-translated via [http://translate.google.com Google Translate].<br/> You can help to correct and verify the translation. Click [http://en.cppreference.com/w/Cppreference:MachineTranslations here] for instructions.</div></div></div></div></div>

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< cpp‎ | locale

 
 
Biblioteca localizações
Localidades e facetas
Original:
Locales and facets
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locale
Classificação de caracteres
Original:
Character classification
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Conversões
Original:
Conversions
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Facet classes base da categoria
Original:
Facet category base classes
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Categorias faceta
Original:
Facet categories
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Específicos da localidade facetas
Original:
Locale-specific facets
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Facetas de conversão de código
Original:
Code conversion facets
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codecvt_utf8(C++11)
codecvt_utf16(C++11)
C localidade
Original:
C locale
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Defined in header <locale>
template<>
class ctype<char>;
Esta especialização de std::ctype encapsula características do personagem de classificação para char tipo. Ao contrário de propósito geral std::ctype, pesquisa de tabela é usada para classificar caracteres. O std::ctype<char> classe base implementa classificação de caracteres equivalente à localidade "C". As regras de classificação pode ser prorrogado ou alterado, se construída como std::ctype_byname<char> ou como uma faceta definido pelo usuário derivada. Todas as funções de entrada std::istream formatados são obrigados a usar std::ctype<char> para classing personagem durante a análise da entrada.
Original:
This specialization of std::ctype encapsulates character classification features for type char. Unlike general-purpose std::ctype, table lookup is used to classify characters. The base class std::ctype<char> implements character classification equivalent to the "C" locale. The classification rules can be extended or modified if constructed as std::ctype_byname<char> or as a user-defined derived facet. All std::istream formatted input functions are required to use std::ctype<char> for character classing during input parsing.
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cpp/locale/ctype basecpp/locale/locale/facetstd-ctype char-inheritance.svg
Sobre esta imagem

Inheritance diagram

Índice

[editar] Tipos de membro

Tipo de membro
Original:
Member type
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Definition
char_type char

[editar] Funções de membro

constrói uma faceta std::ctype<char> novo
Original:
constructs a new std::ctype<char> facet
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(função pública membro) [edit]
destrói uma faceta std::ctype<char>
Original:
destructs a std::ctype<char> facet
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(protegido função de membro) [edit]
obtém a tabela de classificação caráter
Original:
obtains the character classification table
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(função pública membro) [edit]
[estática]
obtém o local "C" tabela de classificação caráter
Original:
obtains the "C" locale character classification table
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(função public static membro) [edit]
classifica um personagem ou uma seqüência de caracteres, usando a tabela de classificação
Original:
classifies a character or a character sequence, using the classification table
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(função pública membro) [edit]
localiza o primeiro caractere em uma seqüência que está de acordo com a classificação dada, usando a tabela de classificação
Original:
locates the first character in a sequence that conforms to given classification, using the classification table
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(função pública membro) [edit]
locates the first character in a sequence that fails given classification, using the classification table
(função pública membro) [edit]
Invoca do_toupper
Original:
invokes do_toupper
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(of std::ctype função pública membro) [edit]
Invoca do_tolower
Original:
invokes do_tolower
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(of std::ctype função pública membro) [edit]
Invoca do_widen
Original:
invokes do_widen
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(of std::ctype função pública membro) [edit]
Invoca do_narrow
Original:
invokes do_narrow
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(of std::ctype função pública membro) [edit]

[editar] Protegido funções de membro

[virtual]
converte um caractere ou caracteres em maiúsculas
Original:
converts a character or characters to uppercase
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(virtual protegido of std::ctype função de membro) [edit]
[virtual]
converte um caractere ou caracteres em letras minúsculas
Original:
converts a character or characters to lowercase
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(virtual protegido of std::ctype função de membro) [edit]
[virtual]
converte um caractere ou caracteres de char para charT
Original:
converts a character or characters from char to charT
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(virtual protegido of std::ctype função de membro) [edit]
[virtual]
converte um caractere ou caracteres de charT para char
Original:
converts a character or characters from charT to char
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(virtual protegido of std::ctype função de membro) [edit]

[editar] Objetos Membros

static std::locale::id id
[estática]
' ID da localidade
Original:
id of the locale
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(membro estático público constante)
static const std::size_t table_size
[estática]
tamanho da tabela de classificação, leaest em 256
Original:
size of the classification table, at leaest 256
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(membro estático público constante)

Inherited from std::ctype_base

Member types

Tipo
Original:
Type
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Definition
mask
bitmask tipo não especificado (tipo de enumeração, inteiro, ou bitset)
Original:
unspecified bitmask type (enumeration, integer type, or bitset)
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Member constants

space
[estática]
o valor de mask classificação de caracteres identificando espaços em branco
Original:
the value of mask identifying whitespace character classification
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(membro estático público constante)
print
[estática]
o valor de mask identificar classificação de caracteres impressos
Original:
the value of mask identifying printable character classification
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(membro estático público constante)
cntrl
[estática]
o valor de mask classificação identificar controle personagem
Original:
the value of mask identifying control character classification
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(membro estático público constante)
upper
[estática]
o valor de mask identificar classificação de caracteres em letras maiúsculas
Original:
the value of mask identifying uppercase character classification
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(membro estático público constante)
lower
[estática]
o valor de mask identificar classificação de caracteres em letras minúsculas
Original:
the value of mask identifying lowercase character classification
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(membro estático público constante)
alpha
[estática]
o valor de mask identificar classificação caractere alfabético
Original:
the value of mask identifying alphabetic character classification
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(membro estático público constante)
digit
[estática]
o valor de identificação de classificação mask caractere de dígito
Original:
the value of mask identifying digit character classification
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(membro estático público constante)
punct
[estática]
o valor de identificação de classificação mask pontuação personagem
Original:
the value of mask identifying punctuation character classification
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(membro estático público constante)
xdigit
[estática]
o valor de mask identificar classificação de caracteres hexadecimal dígitos
Original:
the value of mask identifying hexadecimal digit character classification
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(membro estático público constante)
blank
[estática] (C++11)
o valor de mask identificar classificação de caracteres em branco
Original:
the value of mask identifying blank character classification
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(membro estático público constante)
alnum
[estática]
alpha | digit
(membro estático público constante)
graph
[estática]
alnum | punct
(membro estático público constante)

[editar] Exemplo

O exemplo a seguir demonstra a modificação de <char> ctype tokenizar de um arquivo CSV
Original:
The following example demonstrates modification of ctype<char> to tokenize of a CSV file
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#include <iostream>
#include <vector>
#include <locale>
#include <sstream>
 
// This ctype facet classifies commas and endlines as whitespace
struct csv_whitespace : std::ctype<char> {
    static const mask* make_table()
    {
        // make a copy of the "C" locale table
        static std::vector<mask> v(classic_table(), classic_table() + table_size);
        v[','] |=  space;  // comma will be classified as whitespace
        v[' '] &= ~space;      // space will not be classified as whitespace
        return &v[0];
    }
    csv_whitespace(std::size_t refs = 0) : ctype(make_table(), false, refs) {}
};
 
int main()
{
    std::string in = "Column 1,Column 2,Column 3\n123,456,789";
    std::string token;
 
    std::cout << "default locale:\n";
    std::istringstream s1(in);
    while(s1 >> token)
            std::cout << "  " << token << '\n';
 
    std::cout << "locale with modified ctype:\n";
    std::istringstream s2(in);
    s2.imbue(std::locale(s2.getloc(), new csv_whitespace()));
    while(s2 >> token)
            std::cout << "  " << 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] Veja também

define tabelas de classificação de caracteres
Original:
defines character classification tables
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(modelo de classe)
define categorias de classificação de caracteres
Original:
defines character classification categories
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(modelo de classe)
cria uma faceta ctype para a localidade chamada
Original:
creates a ctype facet for the named locale
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(modelo de classe)