number_rational Class Reference

#include <number_impl.hpp>

Inheritance diagram for number_rational:

List of all members.

Public Member Functions
	number_rational (rational< long > value)
	number_rational (long num)
	number_rational (long num, long den)
rational< long >	value () const
virtual number_impl *	promote_to_void ()
virtual number_impl *	promote_to_double ()
Private Member Functions
virtual std::string	do_to_string () const
virtual void	do_save (std::ostream &stream) const
virtual bool	do_equals (number_impl const &rhs) const
virtual bool	do_less (number_impl const &rhs) const
virtual number_impl *	do_add (number_impl const &rhs)
virtual number_impl *	do_subtract (number_impl const &rhs)
virtual number_impl *	do_multiply (number_impl const &rhs)
virtual number_impl *	do_divide (number_impl const &rhs)
virtual number_impl *	do_promote (number_impl &rhs) const
Private Attributes
rational< long >	value_

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Detailed Description

Represent a rational number. For the greatest range, always use long to represent the numerator and denominator.

Definition at line 119 of file number_impl.hpp.

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Constructor & Destructor Documentation

number_rational::number_rational

(

rational< long >

value

)

[inline]

Definition at line 121 of file number_impl.hpp.

Referenced by do_add(), do_divide(), do_multiply(), and do_subtract().

: number_impl(), value_(value) {}

number_rational::number_rational

(

long

num

)

[inline]

Definition at line 122 of file number_impl.hpp.

: number_impl(), value_(num) {}

number_rational::number_rational	(	long	num,
		long	den
	)			[inline]

Definition at line 123 of file number_impl.hpp.

: number_impl(), value_(num, den) {}

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Member Function Documentation

rational<long> number_rational::value

(

)

const [inline]

Definition at line 124 of file number_impl.hpp.

References value_.

Referenced by do_add(), do_divide(), do_equals(), do_less(), do_multiply(), do_save(), do_subtract(), do_to_string(), and promote_to_double().

{ return value_; }

number_impl * number_rational::promote_to_void

(

)

[virtual]

Reimplemented from number_impl.

Definition at line 336 of file number_impl.cpp.

{
  return new number_void();
}

number_impl * number_rational::promote_to_double

(

)

[virtual]

Reimplemented from number_impl.

Definition at line 341 of file number_impl.cpp.

References value().

{
  return new number_double(value().as<double>());
}

std::string number_rational::do_to_string

(

)

const [private, virtual]

Implements number_impl.

Definition at line 265 of file number_impl.cpp.

References value().

{
  std::ostringstream stream;
  stream << value();
  return stream.str();
}

void number_rational::do_save

(

std::ostream &

stream

)

const [private, virtual]

Implements number_impl.

Definition at line 273 of file number_impl.cpp.

References value().

{
  stream << "rational " << value() << ' ';
}

bool number_rational::do_equals

(

number_impl const &

rhs

)

const [private, virtual]

Implements number_impl.

Definition at line 279 of file number_impl.cpp.

References value().

{
  return value() == dynamic_cast<number_rational const&>(rhs).value();
}

bool number_rational::do_less

(

number_impl const &

rhs

)

const [private, virtual]

Implements number_impl.

Definition at line 285 of file number_impl.cpp.

References value().

{
  return value() < dynamic_cast<number_rational const&>(rhs).value();
}

number_impl * number_rational::do_add

(

number_impl const &

rhs

)

[private, virtual]

Implements number_impl.

Definition at line 291 of file number_impl.cpp.

References rational< T >::denominator(), number_rational(), rational< T >::numerator(), value(), and value_.

{
  rational<long> result = value_ + dynamic_cast<number_rational const&>(rhs).value();
  if (result.denominator() == 1)
    return new number_long(result.numerator());
  else
    return new number_rational(result);
}

number_impl * number_rational::do_subtract

(

number_impl const &

rhs

)

[private, virtual]

Implements number_impl.

Definition at line 300 of file number_impl.cpp.

References rational< T >::denominator(), number_rational(), rational< T >::numerator(), value(), and value_.

{
  rational<long> result = value_ - dynamic_cast<number_rational const&>(rhs).value();
  if (result.denominator() == 1)
    return new number_long(result.numerator());
  else
    return new number_rational(result);
}

number_impl * number_rational::do_multiply

(

number_impl const &

rhs

)

[private, virtual]

Implements number_impl.

Definition at line 309 of file number_impl.cpp.

References rational< T >::denominator(), number_rational(), rational< T >::numerator(), value(), and value_.

{
  rational<long> result = value_ * dynamic_cast<number_rational const&>(rhs).value();
  if (result.denominator() == 1)
    return new number_long(result.numerator());
  else
    return new number_rational(result);
}

number_impl * number_rational::do_divide

(

number_impl const &

rhs

)

[private, virtual]

Implements number_impl.

Definition at line 318 of file number_impl.cpp.

References rational< T >::denominator(), number_rational(), rational< T >::numerator(), value(), and value_.

{
  rational<long> right = dynamic_cast<number_rational const&>(rhs).value();
  if (right == 0L)
    throw calc_error("division by zero");
  rational<long> result = value_ / right;
  if (result.denominator() == 1)
    return new number_long(result.numerator());
  else
    return new number_rational(result);
}

number_impl * number_rational::do_promote

(

number_impl &

rhs

)

const [private, virtual]

Implements number_impl.

Definition at line 330 of file number_impl.cpp.

References number_impl::promote_to_rational().

{
  return rhs.promote_to_rational();
}

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Member Data Documentation

rational<long> number_rational::value_ [private]

Definition at line 138 of file number_impl.hpp.

Referenced by do_add(), do_divide(), do_multiply(), do_subtract(), and value().

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The documentation for this class was generated from the following files:

• number_impl.hpp
• number_impl.cpp

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