is_convertible Class
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is_convertible Class

 

Tests if one type is convertible to another.

template<class From, class To>
    struct is_convertible;

From

The type to convert from.

Ty

The type to convert to.

An instance of the type predicate holds true if the expression To to = from;, where from is an object of type From, is well-formed.

Example

 

// std_tr1__type_traits__is_convertible.cpp 
// compile with: /EHsc 
#include <type_traits> 
#include <iostream> 

struct trivial 
    { 
    int val; 
    }; 

int main() 
    { 
    std::cout << "is_convertible<trivial, int> == " << std::boolalpha 
        << std::is_convertible<trivial, int>::value << std::endl; 
    std::cout << "is_convertible<trivial, trivial> == " << std::boolalpha 
        << std::is_convertible<trivial, trivial>::value << std::endl; 
    std::cout << "is_convertible<char, int> == " << std::boolalpha 
        << std::is_convertible<char, int>::value << std::endl; 

    return (0); 
    } 

is_convertible<trivial, int> == false
is_convertible<trivial, trivial> == true
is_convertible<char, int> == true

Requirements

Header: <type_traits>

Namespace: std

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