From Cppreference
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struct decay;
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(C++11 feature)
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Applies lvalue-to-rvalue, array-to-pointer, and function-to-pointer implicit conversions to the type T, removes cv-qualifiers, and defines the resulting type as the member typedef type. This is the type conversion applied to all function arguments when passed by value.
[edit] Member types
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| Name
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Definition
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the result of applying the decay type conversions to T
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[edit] Equivalent definition
template< class T >
struct decay {
typedef typename std::remove_reference<T>::type U;
typedef typename std::conditional<
std::is_array<U>::value,
typename std::remove_extent<U>::type*,
typename std::conditional<
std::is_function<U>::value,
typename std::add_pointer<U>::type,
typename std::remove_cv<U>::type
>::type
>::type type;
}; |
[edit] Example
[edit] See also