Template Struct unsafe_bits

Struct Documentation

template<typename T>
struct unsafe_bits

Return a random value of type T.

The structure is called “unsafe_bits” because it does not produce random bits suitable for cryptographic applications.

Param T

[in] The (integer) type to generate bits for.

Public Types

using generator_type = typename std::conditional<sizeof(T) == 1, typename std::conditional<std::is_signed<T>::value, int16_t, uint16_t>::type, T>::type

For any integer smaller than 2 Bytes in size, we have to produce values from a 2 Byte type with the same sign. Here, we’re selecting the right type.

This construct selects the matching output type for the uniform distribution.

Public Functions

inline explicit unsafe_bits(T const &min = std::numeric_limits<T>::min(), T const &max = std::numeric_limits<T>::max())

Create an instance of a generator.

Parameters

  • min – [in] optional minimum value; defaults to the T's minimum value.

  • max – [in] optional maximum value; defaults to the T's maximum value.

inline T get()
Returns

a random value of type T that is between the minimum and maximum specified in the constructor.

inline double get_factor()
Returns

a random value as a factor. This treats the range of values given as the minimum and maximum in the constructor as [0,1] and returns a value between the two. The implication is that the maximum and minimum mostly describe the number of discrete values this function can produce.

Public Members

std::default_random_engine generator

Internal generator object.

std::uniform_int_distribution<generator_type> distribution

Internal uniform distribution object.