Boost C++ Libraries

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Class param_type

boost::random::laplace_distribution::param_type

Synopsis

// In header: <boost/random/laplace_distribution.hpp>



class param_type {
public:
  // types
  typedef laplace_distribution distribution_type;

  // construct/copy/destruct
  explicit param_type(RealType = 0.0, RealType = 1.0);

  // public member functions
  RealType mean() const;
  RealType beta() const;

  // friend functions
  template<typename CharT, typename Traits> 
    friend std::basic_ostream< CharT, Traits > & 
    operator<<(std::basic_ostream< CharT, Traits > &, const param_type &);
  template<typename CharT, typename Traits> 
    friend std::basic_istream< CharT, Traits > & 
    operator>>(std::basic_istream< CharT, Traits > &, const param_type &);
  friend bool operator==(const param_type &, const param_type &);
  friend bool operator!=(const param_type &, const param_type &);
};

Description

`param_type` public construct/copy/destruct

```
explicit param_type(RealType mean = 0.0, RealType beta = 1.0);
```
Constructs a param_type from the "mean" and "beta" parameters of the distribution.

`param_type` public member functions

```
RealType mean() const;
```
Returns the "mean" parameter of the distribtuion.
```
RealType beta() const;
```
Returns the "beta" parameter of the distribution.

`param_type` friend functions

template<typename CharT, typename Traits> 
  friend std::basic_ostream< CharT, Traits > & 
  operator<<(std::basic_ostream< CharT, Traits > & os, 
             const param_type & param);

Writes a param_type to a std::ostream.

template<typename CharT, typename Traits> 
  friend std::basic_istream< CharT, Traits > & 
  operator>>(std::basic_istream< CharT, Traits > & is, 
             const param_type & param);

Reads a param_type from a std::istream.

friend bool operator==(const param_type & lhs, const param_type & rhs);

Returns true if the two sets of parameters are the same.

friend bool operator!=(const param_type & lhs, const param_type & rhs);

Returns true if the two sets of parameters are the different.