Varianti

    std::function::operator bool

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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
    Original:
    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
    Original:
    Swap, forward and move
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    swap
    forward(C++11)
    move(C++11)
    move_if_noexcept(C++11)
    declval(C++11)
     
    Funzione oggetti
    Funzione wrapper
    Original:
    Function wrappers
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    function(C++11)
    mem_fn(C++11)
    bad_function_call(C++11)
    Associare
    Original:
    Bind
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    bind(C++11)
    is_bind_expression(C++11)
    is_placeholder(C++11)
    _1, _2, _3, ...(C++11)
    Wrapper di riferimento
    Original:
    Reference wrappers
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    reference_wrapper(C++11)
    ref
    cref    		(C++11)
    (C++11)
    Operatore wrapper
    Original:
    Operator wrappers
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    Negatori
    Original:
    Negators
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    Sconsigliata a leganti e adattatori
    Original:
    Deprecated binders and adaptors
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    unary_function(deprecato)
    binary_function(deprecato)
    ptr_fun(deprecato)
    pointer_to_unary_function(deprecato)
    pointer_to_binary_function(deprecato)
    mem_fun(deprecato)
    mem_fun_t
    mem_fun1_t
    const_mem_fun_t
    const_mem_fun1_t    		(deprecato)
    (deprecato)
    (deprecato)
    (deprecato)
    mem_fun_ref(deprecato)
    mem_fun_ref_t
    mem_fun1_ref_t
    const_mem_fun_ref_t
    const_mem_fun1_ref_t    		(deprecato)
    (deprecato)
    (deprecato)
    (deprecato)
    binder1st
    binder2nd    		(deprecato)
    (deprecato)
    bind1st
    bind2nd    		(deprecato)
    (deprecato)
     
    std::function
    Membri funzioni
    Original:
    Member functions
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    function::function
    function::~function
    function::operator=
    function::swap
    function::assign
    function::operator bool
    function::operator()
    function::target_type
    function::target
    Non membri funzioni
    Original:
    Non-member functions
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    operator==
    operator!=
    std::swap(std::function)
    Helper classi
    Original:
    Helper classes
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    std::uses_allocator<std::function>
     
    <tbody> </tbody>
    explicit operator bool() const;
    		 (dal C++11)
    Verifica se *this memorizza un obiettivo callable funzione, vale a dire non è vuoto.
    Original:
    Checks whether *this stores a callable function target, i.e. is not empty.
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    Parametri

    (Nessuno)
    Original:
    (none)
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    Valore di ritorno

    true se *this memorizza un obiettivo callable funzione, false altrimenti.
    Original:
    true if *this stores a callable function target, false otherwise.
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    Eccezioni

    noexcept specification:  
    <tbody> </tbody>
    noexcept
      (dal C++11)