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    std::numeric_limits::is_signed

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    <metanoindex/>

     
    C++
     
    Utilità libreria
    Tipo di supporto (basic types, RTTI, type traits)
    Gestione della memoria dinamica
    La gestione degli errori
    Programma di utilità
    Funzioni variadic
    Data e ora
    Funzione oggetti
    initializer_list(C++11)
    bitset
    hash(C++11)
    Gli operatori relazionali
    Original:
    Relational operators
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    rel_ops::operator!=
    rel_ops::operator>
    rel_ops::operator<=
    rel_ops::operator>=
    Coppie e tuple
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    Pairs and tuples
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    pair
    tuple(C++11)
    piecewise_construct_t(C++11)
    piecewise_construct(C++11)
    Swap, in avanti e spostare
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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)
     
    Tipo di supporto
    Tipi base
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    Basic types
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    Tipi fondamentali
    Larghezza fissa interi tipi (C++11)
    Limiti numerici
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    Numeric limits
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    numeric_limits
    C numerico limita interfaccia
    Informazioni sul tipo di runtime
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    Runtime type information
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    Tipo tratti
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    Type traits
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    Categorie di tipo primario
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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)
    Proprietà del 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)
    Operazioni supportate
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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)
    I rapporti e le query di proprietà
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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 modifiche
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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)
    Tipo di trasformazioni
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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)
    Digitare costanti tratto
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    Type trait constants
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    integral_constant(C++11)
     
    std::numeric_limits
    Costanti statiche
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    Static constants
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    numeric_limits::is_specialized
    numeric_limits::is_signed
    numeric_limits::is_integer
    numeric_limits::is_exact
    numeric_limits::has_infinity
    numeric_limits::has_quiet_NaN
    numeric_limits::has_signaling_NaN
    numeric_limits::has_denorm
    numeric_limits::has_denorm_loss
    numeric_limits::round_style
    numeric_limits::is_iec559
    numeric_limits::is_bounded
    numeric_limits::is_modulo
    numeric_limits::digits
    numeric_limits::digits10
    numeric_limits::max_digits10(C++11)
    numeric_limits::radix
    numeric_limits::min_exponent
    numeric_limits::min_exponent10
    numeric_limits::max_exponent
    numeric_limits::max_exponent10
    numeric_limits::traps
    numeric_limits::tinyness_before
    Funzioni membro statiche
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    Static member functions
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    numeric_limits::min
    numeric_limits::lowest(C++11)
    numeric_limits::max
    numeric_limits::epsilon
    numeric_limits::round_error
    numeric_limits::infinity
    numeric_limits::quiet_NaN
    numeric_limits::signaling_NaN
    numeric_limits::denorm_min
    Helper tipi
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    Helper types
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    float_round_style
    float_denorm_style
     
    <tbody> </tbody>
    static const bool is_signed
    		 (fino al c++11)
    static constexpr bool is_signed
    		 (dal C++11)
    Il valore di std::numeric_limits<T>::is_signed è true per tutti i tipi aritmetici firmati T e false per i tipi senza segno. Questa costante è significativo per tutte le specializzazioni.
    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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    Specializzazioni standard

    T
    valore di 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
    implementazione definita
    Original:
    implementation-defined
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    signed char true
    unsigned char false
    wchar_t
    implementazione definita
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    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

    Vedi anche

    (C++11)
    Verifica se un tipo è firmata tipo integer
    Original:
    checks if a type is signed integer type
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    (classe template)
    [statico]
    identifica i tipi interi
    Original:
    identifies integer types
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    (pubblico membro statico costante) [modifica]
    [statico]
    identifica i tipi esatti
    Original:
    identifies exact types
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    (pubblico membro statico costante) [modifica]
    [statico]
    		 identifies types that represent a finite set of values
    (pubblico membro statico costante) [modifica]