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std::numeric_limits::digits

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integral_constant(C++11)
 
std::numeric_limits
 
static const int digits
(até C + 11)
static constexpr int digits
(a partir do C++ 11)
O valor de std::numeric_limits<T>::digits é o número de dígitos de base radix-que podem ser representados pela T tipo sem alterações. Para tipos inteiros, este é o número de bits não contando o bit de sinal. Por tipos de ponto flutuante, este é o número de dígitos na mantissa.
Original:
The value of std::numeric_limits<T>::digits is the number of digits in base-radix that can be represented by the type T without change. For integer types, this is the number of bits not counting the sign bit. For floating-point types, this is the number of digits in the mantissa.
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[editar] Especializações padrão

T
valor de std::numeric_limits<T>::digits
Original:
value of std::numeric_limits<T>::digits
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/* non-specialized */ 0
bool 1
char CHAR_BIT - std::numeric_limits<char>::is_signed
signed char CHAR_BIT-1
unsigned char CHAR_BIT
wchar_t CHAR_BIT*sizeof(wchar_t) - std::numeric_limits<wchar_t>::is_signed
char16_t CHAR_BIT*sizeof(char16_t)
char32_t CHAR_BIT*sizeof(char32_t)
short CHAR_BIT*sizeof(short)-1
unsigned short CHAR_BIT*sizeof(short)
int CHAR_BIT*sizeof(int)-1
unsigned int CHAR_BIT*sizeof(int)
long CHAR_BIT*sizeof(long)-1
unsigned long CHAR_BIT*sizeof(long)
long long CHAR_BIT*sizeof(long long)-1
unsigned long long CHAR_BIT*sizeof(long)
float FLT_MANT_DIG
double DBL_MANT_DIG
long double LDBL_MANT_DIG

[editar] Veja também

[estática]
a raiz ou base inteiro usado pela representação do tipo de dado
Original:
the radix or integer base used by the representation of the given type
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(membro estático público constante) [edit]
[estática]
mais um do que o menor poder negativo do radix que é um valor válido de ponto flutuante normalizado
Original:
one more than the smallest negative power of the radix that is a valid normalized floating-point value
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(membro estático público constante) [edit]
[estática]
um a mais que o maior poder inteiro da raiz que é um valor válido de ponto flutuante finita
Original:
one more than the largest integer power of the radix that is a valid finite floating-point value
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(membro estático público constante) [edit]