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std::make_unsigned

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make_unsigned
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Definido no cabeçalho <type_traits>
template< class T >
struct make_unsigned;
 (desde C++11)
Dado um integrante (exceto bool) ou T tipo de enumeração, fornece a type membro typedef que é o tipo inteiro sem sinal correspondente a T, com o mesmo CV-eliminatórias.
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Given an integral (except bool) or enumeration type T, provides the member typedef type which is the unsigned integer type corresponding to T, with the same cv-qualifiers.
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[editar] Tipos de membro

Nome
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Name
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 Definition
type
do tipo inteiro sem sinal correspondente a T
Original:
the unsigned integer type corresponding to T
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[editar] Exemplo

#include <iostream>
#include <type_traits>
 
int main() {
    typedef std::make_unsigned<char>::type char_type;
    typedef std::make_unsigned<int>::type int_type;
    typedef std::make_unsigned<volatile long>::type long_type;
 
    bool ok1 = std::is_same<char_type, unsigned char>::value; 
    bool ok2 = std::is_same<int_type, unsigned int>::value;
    bool ok3 = std::is_same<long_type, volatile unsigned long>::value;
 
    std::cout << std::boolalpha
    << "char_type is 'unsigned char'?          : " << ok1 << '\n'
    << "int_type  is 'unsigned int'?           : " << ok2 << '\n'
    << "long_type is 'volatile unsigned long'? : " << ok3 << '\n';
}

Saída: 

char_type is 'unsigned char'?          : true
int_type  is 'unsigned int'?           : true
long_type is 'volatile unsigned long'? : true

[editar] Veja também

(C++11)
verifica se um tipo é assinado tipo de aritmética
Original:
checks if a type is signed arithmetic type
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(modelo de classe) [edit]
(C++11)
verifica se um tipo é o tipo de aritmética sem sinal
Original:
checks if a type is unsigned arithmetic type
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(modelo de classe) [edit]
(C++11)
faz o tipo de dado integrante assinado
Original:
makes the given integral type signed
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(modelo de classe) [edit]
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