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C++ named requirements: RandomNumberEngineAdaptor (since C++11)
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:
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