C++ keyword: struct

From cppreference.com
< cpp‎ | keyword
 
 
C++ language
General topics
Flow control
Conditional execution statements
if
Iteration statements (loops)
for
range-for (C++11)
Jump statements
Functions
Function declaration
Lambda function expression
inline specifier
Dynamic exception specifications (until C++17*)
noexcept specifier (C++11)
Exceptions
Namespaces
Types
Specifiers
decltype (C++11)
auto (C++11)
alignas (C++11)
Storage duration specifiers
Initialization
Expressions
Alternative representations
Literals
Boolean - Integer - Floating-point
Character - String - nullptr (C++11)
User-defined (C++11)
Utilities
Attributes (C++11)
Types
typedef declaration
Type alias declaration (C++11)
Casts
Implicit conversions - Explicit conversions
static_cast - dynamic_cast
const_cast - reinterpret_cast
Memory allocation
Classes
Class-specific function properties
explicit (C++11)
static
Special member functions
Templates
Miscellaneous
 
 

Usage

(since C++11)
  • If a function or a variable exists in scope with the name identical to the name of a non-union class type, struct can be prepended to the name for disambiguation, resulting in an elaborated type specifier.

Example

struct Foo; // forward declaration of a struct
 
struct Bar  // definition of a struct
{
    Bar(int i) : i(i + i) {}
 
    int i;
};
 
enum struct Pub // scoped enum, since C++11
{
    b, d, p, q,
};
 
int main()
{
    Bar Bar(1);
    struct Bar Bar2(2); // elaborated type
}