hitfit::Constraint Class Reference

Represent a mass constraint equation. Mass constraints come in two varieties, either saying that the sum of a set of labels should equal a constant:
More...

#include <Constraint.h>

Public Member Functions
	Constraint (std::string s)
	Constraint (const Constraint &c)
int	has_labels (int ilabel, int jlabel) const
Constraint &	operator= (const Constraint &c)
double	sum_mass_terms (const Fourvec_Event &ev) const
	~Constraint ()

Private Attributes
std::unique_ptr < Constraint_Intermed >	_lhs
std::unique_ptr < Constraint_Intermed >	_rhs

Friends
std::ostream &	operator<< (std::ostream &s, const Constraint &c)
	Output stream operator, print the content of this Constraint to an output stream. More...

Detailed Description

Represent a mass constraint equation. Mass constraints come in two varieties, either saying that the sum of a set of labels should equal a constant:

.

or that two such sums should be equal to each other:

.

We represent such a constraint equation by two Constraint_Intermed instances, each of which represents one side of the equation.

Definition at line 73 of file Constraint.h.

Constructor & Destructor Documentation

hitfit::Constraint::Constraint

(

std::string

s

)

Constructor.

Parameters

s	The string to parse describing the constraint.

Definition at line 77 of file Constraint.cc.

References _lhs, _rhs, cms::cuda::assert(), mps_fire::i, hitfit::make_constraint_intermed(), and eostools::move().

  {
    // Split it at the equals sign.
    string::size_type i = s.find('=');
    assert(i != string::npos);

    // And then build the two halves.
    {
      unique_ptr<Constraint_Intermed> ci = make_constraint_intermed(s.substr(0, i));
      _lhs = std::move(ci);
    }
    {
      unique_ptr<Constraint_Intermed> ci = make_constraint_intermed(s.substr(i + 1));
      _rhs = std::move(ci);
    }
  }

hitfit::Constraint::Constraint

(

const Constraint &

c

)

Copy constructor.

Parameters

c	The original object to be copied.

Definition at line 45 of file Constraint.cc.

      : _lhs(c._lhs->clone()), _rhs(c._rhs->clone()) {}

hitfit::Constraint::~Constraint ( )

inline

Destructor.

Definition at line 99 of file Constraint.h.

{}

Member Function Documentation

int hitfit::Constraint::has_labels	(	int	ilabel,
		int	jlabel
	)		const

See if this guy references both labels ilabel and jlabel on a single single side of the constraint equation.

Parameters

ilabel	The first label to test.
jlabel	The second label to test.

Return:

• +1 if the LHS references both.
• -1 if the RHS references both.
• 0 if neither reference both.

Definition at line 101 of file Constraint.cc.

  {
    if (_lhs->has_labels(ilabel, jlabel))
      return 1;
    else if (_rhs->has_labels(ilabel, jlabel))
      return -1;
    else
      return 0;
  }

Constraint & hitfit::Constraint::operator=

(

const Constraint &

c

)

Assignment operator.

Parameters

c	The original object to be copied.

Definition at line 54 of file Constraint.cc.

References _lhs, _rhs, and eostools::move().

  {
    {
      unique_ptr<Constraint_Intermed> ci = c._lhs->clone();
      _lhs = std::move(ci);
    }
    {
      unique_ptr<Constraint_Intermed> ci = c._rhs->clone();
      _rhs = std::move(ci);
    }

    return *this;
  }

double hitfit::Constraint::sum_mass_terms

(

const Fourvec_Event &

ev

)

const

Evaluate the mass constraint, using the data in ev.

Parameters

ev	The event for which the constraint should be evaluated.

Return:

Definition at line 124 of file Constraint.cc.

References ev.

  {
    return _lhs->sum_mass_terms(ev) - _rhs->sum_mass_terms(ev);
  }

Friends And Related Function Documentation

std::ostream& operator<< ( std::ostream &  s, const Constraint &  c  )

friend

Output stream operator, print the content of this Constraint to an output stream.

Parameters

s	The stream to which to write.
c	The instance of Constraint to be printed.

Definition at line 149 of file Constraint.cc.

  {
    s << *c._lhs.get() << " = " << *c._rhs.get();
    return s;
  }

Member Data Documentation

std::unique_ptr<Constraint_Intermed> hitfit::Constraint::_lhs

private

Left hand side of the constraint.

Definition at line 147 of file Constraint.h.

Referenced by Constraint(), hitfit::operator<<(), and operator=().

std::unique_ptr<Constraint_Intermed> hitfit::Constraint::_rhs

private

Right hand side of the constraint.

Definition at line 152 of file Constraint.h.

Referenced by Constraint(), hitfit::operator<<(), and operator=().