C++ named requirements: RandomNumberEngineAdaptor (since C++11) (original) (raw)
A RandomNumberEngineAdaptor is a RandomNumberEngine that transforms the output of another RandomNumberEngine, the latter of which is termed a base engine.
[edit] Requirements
Given
- B, a RandomNumberEngine
- b, an object of type B
- A, a RandomNumberEngineAdaptor, adapting B as a base engine
- a, an object of type A
| function | semantics |
|---|---|
| A::A(); | The base engine is initialized as if by its default constructor. |
| bool operator==(const A& lhs, const A& rhs); | Returns whether lhs's base engine is equal to rhs's base engine or not. |
| A::A(result_type s); | The base engine is initialized with s. |
| template<class Sseq> A::A(Sseq& q); | The base engine is initialized with q. |
| void seed(); | Invokes b.seed(). |
| void seed(result_type s); | Invokes b.seed(s). |
| template<class Sseq> void seed(Sseq& q); | Invokes b.seed(q). |
Furthermore
- The complexity of each function of A does not exceed the complexity of the function of B
- The state of A includes the state of B
- The size of A's state is no less than the size of b
- Copying A's state includes copying B's state
- The textual representation of A includes the textual representation of B
[edit] Standard library
The following standard library facilities satisfy RandomNumberEngineAdaptor: