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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>

      De cppreference.com

      This page has been machine-translated from the English version of the wiki using Google Translate.

      The translation may contain errors and awkward wording. Hover over text to see the original version. You can help to fix errors and improve the translation. For instructions click here.

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      <metanoindex/>

       
      C++
       
      Biblioteca localizações
      Localidades e facetas
      Original:
      Locales and facets
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      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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      (C++11)
      (C++11)
      C localidade
      Original:
      C locale
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      <tbody> </tbody>
      Definido no cabeçalho <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/facet

      Inheritance diagram

      Tipos de membro

      Tipo de membro
      Original:
      Member type
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      		 Definition
      char_type char

      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]

      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]

      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)

      Herdado de 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)

      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';
}

      Saída: 

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

      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)