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std::numeric_limits::is_signed

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Biblioteca de utilitários
Digite apoio (basic types, RTTI, type traits)
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Utilidades do programa
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Data e hora
Objetos de função
initializer_list(C++11)
bitset
hash(C++11)
Os operadores relacionais
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Relational operators
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rel_ops::operator!=
rel_ops::operator>
rel_ops::operator<=
rel_ops::operator>=
Pares e tuplas
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Pairs and tuples
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pair
tuple(C++11)
piecewise_construct_t(C++11)
piecewise_construct(C++11)
Troque, avançar e avançar
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Swap, forward and move
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swap
forward(C++11)
move(C++11)
move_if_noexcept(C++11)
declval(C++11)
 
Digite apoio
Tipos básicos
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Basic types
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Tipos fundamentais
Tipos inteiros de largura fixos (C++11)
Limites numéricos
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Numeric limits
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numeric_limits
C numérico limita interface
Informações de tipo de tempo de execução
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Runtime type information
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Características de tipo
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Type traits
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Principais categorias de tipo
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Primary type categories
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is_void(C++11)
is_array(C++11)
is_pointer(C++11)
is_enum(C++11)
is_union(C++11)
is_class(C++11)
is_function(C++11)
is_object(C++11)
is_scalar(C++11)
is_compound(C++11)
is_integral(C++11)
is_floating_point(C++11)
is_fundamental(C++11)
is_arithmetic(C++11)
is_reference(C++11)
is_lvalue_reference(C++11)
is_rvalue_reference(C++11)
is_member_pointer(C++11)
is_member_object_pointer(C++11)
is_member_function_pointer(C++11)
Propriedades de tipo
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Type properties
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is_const(C++11)
is_volatile(C++11)
is_pod(C++11)
is_empty(C++11)
is_polymorphic(C++11)
is_abstract(C++11)
Operações apoiadas
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Supported operations
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is_constructible
is_trivially_constructible
is_nothrow_constructible
(C++11)
(C++11)
(C++11)
is_default_constructible
is_trivially_default_constructible
is_nothrow_default_constructible
(C++11)
(C++11)
(C++11)
is_copy_constructible
is_trivially_copy_constructible
is_nothrow_copy_constructible
(C++11)
(C++11)
(C++11)
is_move_constructible
is_trivially_move_constructible
is_nothrow_move_constructible
(C++11)
(C++11)
(C++11)
is_assignable
is_trivially_assignable
is_nothrow_assignable
(C++11)
(C++11)
(C++11)
is_copy_assignable
is_trivially_copy_assignable
is_nothrow_copy_assignable
(C++11)
(C++11)
(C++11)
is_move_assignable
is_trivially_move_assignable
is_nothrow_move_assignable
(C++11)
(C++11)
(C++11)
is_destructible
is_trivially_destructible
is_nothrow_destructible
(C++11)
(C++11)
(C++11)
has_virtual_destructor(C++11)
Relacionamentos e consultas de propriedade
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Relationships and property queries
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is_same(C++11)
is_base_of(C++11)
is_convertible(C++11)
alignment_of(C++11)
rank(C++11)
extent(C++11)
Tipo modificações
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Type modifications
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remove_cv
remove_const
remove_volatile
(C++11)
(C++11)
(C++11)
add_cv
add_const
add_volatile
(C++11)
(C++11)
(C++11)
make_signed(C++11)
make_unsigned(C++11)
Transformações tipo
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Type transformations
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aligned_storage(C++11)
aligned_union(C++11)
decay(C++11)
enable_if(C++11)
conditional(C++11)
common_type(C++11)
underlying_type(C++11)
result_of(C++11)
Digite constantes traço
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Type trait constants
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integral_constant(C++11)
 
std::numeric_limits
 
static const bool is_signed
(até C + 11)
static constexpr bool is_signed
(a partir do C++ 11)
O valor da std::numeric_limits<T>::is_signed é true para todos os tipos aritméticos assinados T e false para os tipos não assinados. Esta constante é significativo para todas as especializações.
Original:
The value of std::numeric_limits<T>::is_signed is true for all signed arithmetic types T and false for the unsigned types. This constant is meaningful for all specializations.
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[editar] Especializações padrão

T
valor de std::numeric_limits<T>::is_signed
Original:
value of std::numeric_limits<T>::is_signed
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/* non-specialized */ false
bool false
char
definida pela implementação
Original:
implementation-defined
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signed char true
unsigned char false
wchar_t
definida pela implementação
Original:
implementation-defined
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char16_t false
char32_t false
short true
unsigned short false
int true
unsigned int false
long true
unsigned long false
long long true
unsigned long long false
float true
double true
long double true

[editar] Veja também

(C++11)
verifica se um tipo é assinado tipo inteiro
Original:
checks if a type is signed integer type
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(modelo de classe)
[estática]
identifica os tipos inteiros
Original:
identifies integer types
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(membro estático público constante) [edit]
[estática]
identifica os tipos de exatas
Original:
identifies exact types
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(membro estático público constante) [edit]
[estática]
identifies types that represent a finite set of values
(membro estático público constante) [edit]