C++ keyword: class
Usage
| (since C++11) |
- In a template declaration, class can be used to introduce type template parameters and template template parameters
- If a function or a variable exists in scope with the name identical to the name of a class type, class can be prepended to the name for disambiguation, resulting in an elaborated type specifier.
Example
class Foo; // forward declaration of a class
class Bar // definition of a class
{
public:
Bar(int i) : m_i(i) {}
private:
int m_i;
};
template<class T> // template argument
void qux()
{
T t;
}
enum class Pub // scoped enum, since C++11
{
b, d, p, q
};
int main()
{
Bar Bar(1); // variable Bar hides type Bar
Bar Bar2(2); // compiler error
class Bar Bar3(3); // elaborated type
}
See also
| (since C++11) |
| (since C++20) |
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