Empty Base Class Optimization EBCO helper. More...
#include <iffl_common.h>
Inheritance diagram for iffl::compressed_pair< T1, T2, bool >:
Public Member Functions | |
| template<class... P> | |
| constexpr | compressed_pair (zero_then_variadic_args_t, P &&... p) |
| Constructor. More... | |
| template<class P1 , class... P2> | |
| constexpr | compressed_pair (one_then_variadic_args_t, P1 &&p1, P2 &&... p2) |
| Constructor. More... | |
| constexpr T1 & | get_first () noexcept |
| Returns a reference to the first element of compressed pair. | |
| constexpr T1 const & | get_first () const noexcept |
| Returns a const reference to the first element of compressed pair. | |
| constexpr T2 & | get_second () noexcept |
| Returns a reference to the second element of compressed pair. | |
| constexpr T2 const & | get_second () const noexcept |
| Returns a const reference to the second element of compressed pair. | |
Detailed Description
template<class T1, class T2, bool = std::is_empty_v<T1> && !std::is_final_v<T1>>
class iffl::compressed_pair< T1, T2, bool >
Empty Base Class Optimization EBCO helper.
- Template Parameters
-
T1 - First type is inherited from if it is possible, and if it safes space T2 - Second type is always a member
Store a pair of values, deriving from empty first. This is a general template for the case when inheriting from T1 would help. We use SFINAE on the 3rd parameter to fail this instantiation when EBCO would not help or would not work. Other specialization should be used in that case. This is a naive implementation borrowed from the MSVC CRT. More complete implementation can be found in boost
Constructor & Destructor Documentation
◆ compressed_pair() [1/2]
template<class T1, class T2, bool = std::is_empty_v<T1> && !std::is_final_v<T1>>
template<class... P>
|
inlineexplicit |
Constructor.
- Template Parameters
-
P - triadic parameter pack forwarded to the constructor of T2
- Parameters
-
p - parameters for the T2 constructor
Value initialize first parameter, and passes all other parameters to the constructor of second
◆ compressed_pair() [2/2]
template<class T1, class T2, bool = std::is_empty_v<T1> && !std::is_final_v<T1>>
template<class P1 , class... P2>
|
inline |
Constructor.
- Template Parameters
-
P1 - parameter used to initialize T1 P2 - variadic parameter pack forwarded to the constructor of T2
- Parameters
-
p1 - parameter for the T1 constructor p2 - parameters for the T2 constructor
Constructs first parameter from p1, and passes all other parameters to the constructor of second.
The documentation for this class was generated from the following file:
- include/iffl_common.h
