Namespaces
Variants
Views
Actions

C++ keywords: class

From cppreference.com
< cpp‎ | keyword
Revision as of 22:58, 2 November 2012 by P12bot (Talk | contribs)

 
 
C++ language
General topics
Flow control
Conditional execution statements
Iteration statements
Jump statements
Functions
function declaration
lambda function declaration
function template
inline specifier
exception specifications (deprecated)
noexcept specifier (C++11)
Exceptions
Namespaces
Types
decltype specifier (C++11)
Specifiers
cv specifiers
storage duration specifiers
constexpr specifier (C++11)
auto specifier (C++11)
alignas specifier (C++11)
Initialization
Literals
Expressions
alternative representations
Utilities
Types
typedef declaration
type alias declaration (C++11)
attributes (C++11)
Casts
implicit conversions
const_cast conversion
static_cast conversion
dynamic_cast conversion
reinterpret_cast conversion
C-style and functional cast
Memory allocation
Classes
Class-specific function properties
Special member functions
Templates
class template
function template
template specialization
parameter packs (C++11)
Miscellaneous
Inline assembly
 
 

Usage

  • declaration of a class
  • In a class template or function template, class can be used as an alternative to typename to introduce type 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;
}
 
int main()
{
    Bar Bar(1);
    class Bar Bar2(2); // elaborated type
}