std::discard_block_engine
Defined in header <random> | ? | ? |
|---|---|---|
template< class Engine, size_t P, size_t R > class discard_block_engine; | ? | (since C++11) |
discard_block_engine是一个伪随机数产生器适配器，它丢弃由基本引擎产生的一定数量的数据。从每一块大小P由基本引擎生成的适配器只保留R数字，丢弃剩下的。
模板参数
Engine | - | the type of the wrapped engine |
|---|---|---|
P | - | the size of a block. Must be greater than 0. |
R | - | the number of used numbers per block. Must be greater than 0 and not greater than P |
类型要求
发动机必须符合RandomNumberEngine的要求。
成员类型
Member type | Definition |
|---|---|
result_type | Engine::result_type |
成员函数
(constructor) | constructs the engine adaptor (public member function) |
|---|---|
seed | sets the state of the underlying engine (public member function) |
base | returns the underlying engine (public member function) |
世代
运算符%28%29提升基础引擎的状态，并返回生成值%28公共成员函数%29
丢弃将适配器%27s状态提升指定数量%28公共成员函数%29。
特征
敏静态获取基础引擎输出范围中的最小值。%28公共静态成员功能%29
马克斯静态获取基础引擎输出范围中的最大可能值。%28公共静态成员功能%29
非会员职能
operator==operator!= | compares the internal states of the adaptors and underlying engines (function) |
|---|---|
operator<<operator>> | performs stream input and output on pseudo-random number engine adaptor (function) |
成员对象
constexpr size_t block_size static | the size of the block, P (public static member constant) |
|---|---|
constexpr size_t used_size static | the number of used numbers per block, R (public static member constant) |
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