A wrapper class for a native, fixed-precision integer type of the given size. More...

#include <maths/integer.h>

Public Types
using	Native = typename IntOfSize< bytes >::type
	The native data type used to store this integer. More...

Public Member Functions
	NativeInteger ()
	Initialises this integer to zero. More...

	NativeInteger (Native value)
	Initialises this integer to the given value. More...

	NativeInteger (const NativeInteger< bytes > &value)
	Initialises this integer to the given value. More...

template<bool supportInfinity>
	NativeInteger (const IntegerBase< supportInfinity > &value)
	Initialises this integer to the given value. More...

bool	isZero () const
	Returns whether or not this integer is zero. More...

int	sign () const
	Returns the sign of this integer. More...

Native	nativeValue () const
	Returns the value of this integer in its native type. More...

NativeInteger &	operator= (const NativeInteger &value)
	Sets this integer to the given value. More...

NativeInteger &	operator= (Native value)
	Sets this integer to the given value. More...

void	swap (NativeInteger &other) noexcept
	Swaps the values of this and the given integer. More...

bool	operator== (const NativeInteger &rhs) const
	Determines if this is equal to the given integer. More...

bool	operator== (Native rhs) const
	Determines if this is equal to the given integer. More...

bool	operator!= (const NativeInteger &rhs) const
	Determines if this is not equal to the given integer. More...

bool	operator!= (Native rhs) const
	Determines if this is not equal to the given integer. More...

bool	operator< (const NativeInteger &rhs) const
	Determines if this is less than the given integer. More...

bool	operator< (Native rhs) const
	Determines if this is less than the given integer. More...

bool	operator> (const NativeInteger &rhs) const
	Determines if this is greater than the given integer. More...

bool	operator> (Native rhs) const
	Determines if this is greater than the given integer. More...

bool	operator<= (const NativeInteger &rhs) const
	Determines if this is less than or equal to the given integer. More...

bool	operator<= (Native rhs) const
	Determines if this is less than or equal to the given integer. More...

bool	operator>= (const NativeInteger &rhs) const
	Determines if this is greater than or equal to the given integer. More...

bool	operator>= (Native rhs) const
	Determines if this is greater than or equal to the given integer. More...

NativeInteger &	operator++ ()
	The preincrement operator. More...

NativeInteger	operator++ (int)
	The postincrement operator. More...

NativeInteger &	operator-- ()
	The predecrement operator. More...

NativeInteger	operator-- (int)
	The postdecrement operator. More...

NativeInteger	operator+ (const NativeInteger &other) const
	Adds this to the given integer and returns the result. More...

NativeInteger	operator+ (Native other) const
	Adds this to the given integer and returns the result. More...

NativeInteger	operator- (const NativeInteger &other) const
	Subtracts the given integer from this and returns the result. More...

NativeInteger	operator- (Native other) const
	Subtracts the given integer from this and returns the result. More...

NativeInteger	operator* (const NativeInteger &other) const
	Multiplies this by the given integer and returns the result. More...

NativeInteger	operator* (Native other) const
	Multiplies this by the given integer and returns the result. More...

NativeInteger	operator/ (const NativeInteger &other) const
	Divides this by the given integer and returns the result. More...

NativeInteger	operator/ (Native other) const
	Divides this by the given integer and returns the result. More...

NativeInteger	divExact (const NativeInteger &other) const
	Divides this by the given integer and returns the result. More...

NativeInteger	divExact (Native other) const
	Divides this by the given integer and returns the result. More...

NativeInteger	operator% (const NativeInteger &other) const
	Determines the remainder when this integer is divided by the given integer. More...

NativeInteger	operator% (Native other) const
	Determines the remainder when this integer is divided by the given integer. More...

std::pair< NativeInteger, NativeInteger >	divisionAlg (const NativeInteger &divisor) const
	Uses the division algorithm to obtain a quotient and remainder when dividing by the given integer. More...

NativeInteger	operator- () const
	Determines the negative of this integer. More...

NativeInteger &	operator+= (const NativeInteger &other)
	Adds the given integer to this. More...

NativeInteger &	operator+= (Native other)
	Adds the given integer to this. More...

NativeInteger &	operator-= (const NativeInteger &other)
	Subtracts the given integer from this. More...

NativeInteger &	operator-= (Native other)
	Subtracts the given integer from this. More...

NativeInteger &	operator*= (const NativeInteger &other)
	Multiplies the given integer by this. More...

NativeInteger &	operator*= (Native other)
	Multiplies the given integer by this. More...

NativeInteger &	operator/= (const NativeInteger &other)
	Divides this by the given integer. More...

NativeInteger &	operator/= (Native other)
	Divides this by the given integer. More...

NativeInteger &	divByExact (const NativeInteger &other)
	Divides this by the given integer. More...

NativeInteger &	divByExact (Native other)
	Divides this by the given integer. More...

NativeInteger &	operator%= (const NativeInteger &other)
	Reduces this integer modulo the given integer. More...

NativeInteger &	operator%= (Native other)
	Reduces this integer modulo the given integer. More...

void	negate ()
	Negates this integer. More...

void	gcdWith (const NativeInteger &other)
	Sets this integer to be the greatest common divisor of this and the given integer. More...

NativeInteger	gcd (const NativeInteger &other) const
	Determines the greatest common divisor of this and the given integer. More...

bool	isInfinite () const
	Returns whether this integer is infinity. More...

void	tryReduce ()
	A do-nothing routine that ensures that this integer is using a native C/C++ integer representation. More...

Detailed Description

template<int bytes>
class regina::NativeInteger< bytes >

A wrapper class for a native, fixed-precision integer type of the given size.

This class behaves just like native integer arithmetic, where the underlying integer type is signed and stores the given number of bytes. There is no overflow testing, and it is up to the user to ensure that overflows do not occur. On the other hand, this class is almost as fast as native integer arithmetic (i.e., there is very little overhead).

The reason for using this class, instead of working directly in a native integer type, is that this class offers an interface that is compatible with Integer. Only some of the Integer member functions are offered here; however, those that are offered behave just like their Integer counterparts (with the single exception that all arithmetic in NativeInteger is subject to overflow). Developers can therefore switch between integer types easily with minimal changes to their code, or support both Integer and NativeInteger types as template arguments.

This class supports copying but does not implement separate move operations, since its internal data is so small that copying is just as efficient. It implements the C++ Swappable requirement via its own member and global swap() functions, for consistency with the Integer and LargeInteger classes.

Precondition: The system must support integers of the given size; in particular, there must be an appropriate specialisation IntOfSize<bytes>.

Python: Not present. The purpose of NativeInteger is to be a highly optimised drop-in replacement for Integer as a C++ template parameter. Python users should just use regina.Integer if you need Regina's integer interface, or Python's own integer type if you do not.

Member Typedef Documentation

◆ Native

template<int bytes>

using regina::NativeInteger< bytes >::Native = typename IntOfSize<bytes>::type

The native data type used to store this integer.

Constructor & Destructor Documentation

◆ NativeInteger() [1/4]

template<int bytes>

regina::NativeInteger< bytes >::NativeInteger

inline

Initialises this integer to zero.

◆ NativeInteger() [2/4]

template<int bytes>

regina::NativeInteger< bytes >::NativeInteger ( Native value )

inline

Initialises this integer to the given value.

Parameters

value the new value of this integer.

◆ NativeInteger() [3/4]

template<int bytes>

regina::NativeInteger< bytes >::NativeInteger ( const NativeInteger< bytes > & value )

inline

Initialises this integer to the given value.

Parameters

value the new value of this integer.

◆ NativeInteger() [4/4]

template<int bytes>

template<bool supportInfinity>

regina::NativeInteger< bytes >::NativeInteger ( const IntegerBase< supportInfinity > & value )

inlineexplicit

Initialises this integer to the given value.

This constructor is marked as explicit in the hope of avoiding accidental (and unintentional) mixing of integer classes.

It is the programmer's reponsibility to ensure that the given value fits within the required range. If the given value is too large or small to fit into this native type, then this new NativeInteger will have an undefined initial value.

Precondition: If bytes is larger than sizeof(long), then bytes is a strict multiple of sizeof(long). For instance, if longs are 8 bytes then you can use this routine with bytes=16 but not bytes=12. This restriction is enforced through a compile-time assertion, but may be lifted in future versions of Regina.; The given integer is not infinity.

Parameters

value the new value of this integer.

Member Function Documentation

◆ divByExact() [1/2]

template<int bytes>

NativeInteger< bytes > & regina::NativeInteger< bytes >::divByExact ( const NativeInteger< bytes > & other )

inline

Divides this by the given integer.

For native integers, this routine is identical to operator /=.

Precondition: other is not zero.

Parameters

other the integer to divide this by.

Returns: a reference to this integer with its new value.

◆ divByExact() [2/2]

template<int bytes>

NativeInteger< bytes > & regina::NativeInteger< bytes >::divByExact ( Native other )

inline

Divides this by the given integer.

For native integers, this routine is identical to operator /=.

Precondition: other is not zero.

Parameters

other the integer to divide this by.

Returns: a reference to this integer with its new value.

◆ divExact() [1/2]

template<int bytes>

NativeInteger< bytes > regina::NativeInteger< bytes >::divExact ( const NativeInteger< bytes > & other ) const

inline

Divides this by the given integer and returns the result.

For native integers, this is identical to operator /.

Precondition: other is not zero.

Parameters

other the integer to divide this by.

Returns: the quotient this divided by other.

◆ divExact() [2/2]

template<int bytes>

NativeInteger< bytes > regina::NativeInteger< bytes >::divExact ( Native other ) const

inline

Divides this by the given integer and returns the result.

For native integers, this is identical to operator /.

Precondition: other is not zero.

Parameters

other the integer to divide this by.

Returns: the quotient this divided by other.

◆ divisionAlg()

template<int bytes>

std::pair< NativeInteger< bytes >, NativeInteger< bytes > > regina::NativeInteger< bytes >::divisionAlg ( const NativeInteger< bytes > & divisor ) const

inline

Uses the division algorithm to obtain a quotient and remainder when dividing by the given integer.

Suppose this integer is n and we pass the divisor d. The division algorithm describes the result of dividing n by d; in particular, it expresses n = qd + r, where q is the quotient and r is the remainder.

The division algorithm is precise about which values of q and r are chosen; in particular it chooses the unique r in the range 0 ≤ r < |d|.

Note that this differs from other division routines in this class, in that it always rounds to give a non-negative remainder. Thus (-7).divisionAlg(3) gives quotient -3 and remainder 2, whereas (-7)/3 gives quotient -2 and (-7)%3 gives remainder -1.

In the special case where the given divisor is 0 (not allowed by the usual division algorithm), this routine selects quotient 0 and remainder n.

Parameters

divisor the divisor d.

Returns: the pair (q, r), where q is the quotient and r is the remainder, as described above.

◆ gcd()

template<int bytes>

NativeInteger< bytes > regina::NativeInteger< bytes >::gcd ( const NativeInteger< bytes > & other ) const

inline

Determines the greatest common divisor of this and the given integer.

This integer is not changed.

The result is guaranteed to be non-negative. As a special case, gcd(0,0) is considered to be zero.

Parameters

other the integer whose greatest common divisor with this will be found.

Returns: the greatest common divisor of this and the given integer.

◆ gcdWith()

template<int bytes>

void regina::NativeInteger< bytes >::gcdWith ( const NativeInteger< bytes > & other )

Sets this integer to be the greatest common divisor of this and the given integer.

The result is guaranteed to be non-negative. As a special case, gcd(0,0) is considered to be zero.

Parameters

other the integer whose greatest common divisor with this will be found.

Now everything is non-negative. The following code is based on Stein's binary GCD algorithm.

◆ isInfinite()

template<int bytes>

bool regina::NativeInteger< bytes >::isInfinite

inline

Returns whether this integer is infinity.

Since NativeInteger cannot represent infinity, this routine will always return false. This routine is simply provided for compatibility with LargeInteger (where infinity is allowed).

Returns: false, since a NativeInteger can never be infinity.

◆ isZero()

template<int bytes>

bool regina::NativeInteger< bytes >::isZero

inline

Returns whether or not this integer is zero.

Returns: true if and only if this integer is zero.

◆ nativeValue()

template<int bytes>

NativeInteger< bytes >::Native regina::NativeInteger< bytes >::nativeValue

inline

Returns the value of this integer in its native type.

Returns: the value of this integer.

◆ negate()

template<int bytes>

void regina::NativeInteger< bytes >::negate

inline

Negates this integer.

This integer is changed to reflect the result.

◆ operator!=() [1/2]

template<int bytes>

bool regina::NativeInteger< bytes >::operator!= ( const NativeInteger< bytes > & rhs ) const

inline

Determines if this is not equal to the given integer.

Parameters

rhs	the integer with which this will be compared.

Returns: true if and only if this and the given integer are not equal.

◆ operator!=() [2/2]

template<int bytes>

bool regina::NativeInteger< bytes >::operator!= ( Native rhs ) const

inline

Determines if this is not equal to the given integer.

Parameters

rhs	the integer with which this will be compared.

Returns: true if and only if this and the given integer are not equal.

◆ operator%() [1/2]

template<int bytes>

NativeInteger< bytes > regina::NativeInteger< bytes >::operator% ( const NativeInteger< bytes > & other ) const

inline

Determines the remainder when this integer is divided by the given integer.

If non-zero, the result will have the same sign as this integer. This integer is not changed.

For a division routine that always returns a non-negative remainder, see divisionAlg().

Precondition: other is not zero.

Parameters

other the integer to divide this by.

Returns: the remainder this modulo other.

◆ operator%() [2/2]

template<int bytes>

NativeInteger< bytes > regina::NativeInteger< bytes >::operator% ( Native other ) const

inline

Determines the remainder when this integer is divided by the given integer.

If non-zero, the result will have the same sign as this integer. This integer is not changed.

For a division routine that always returns a non-negative remainder, see divisionAlg().

Precondition: other is not zero.

Parameters

other the integer to divide this by.

Returns: the remainder this modulo other.

◆ operator%=() [1/2]

template<int bytes>

NativeInteger< bytes > & regina::NativeInteger< bytes >::operator%= ( const NativeInteger< bytes > & other )

inline

Reduces this integer modulo the given integer.

If non-zero, the result will have the same sign as the original value of this integer. This integer is changed to reflect the result.

For a mod routine that always returns a non-negative remainder, see divisionAlg().

Precondition: other is not zero.

Parameters

other the integer modulo which this integer will be reduced.

Returns: a reference to this integer with its new value.

◆ operator%=() [2/2]

template<int bytes>

NativeInteger< bytes > & regina::NativeInteger< bytes >::operator%= ( Native other )

inline

Reduces this integer modulo the given integer.

If non-zero, the result will have the same sign as the original value of this integer. This integer is changed to reflect the result.

For a mod routine that always returns a non-negative remainder, see divisionAlg().

Precondition: other is not zero.

Parameters

other the integer modulo which this integer will be reduced.

Returns: a reference to this integer with its new value.

◆ operator*() [1/2]

template<int bytes>

NativeInteger< bytes > regina::NativeInteger< bytes >::operator* ( const NativeInteger< bytes > & other ) const

inline

Multiplies this by the given integer and returns the result.

This integer is not changed.

Parameters

other the integer to multiply by this integer.

Returns: the product this times other.

◆ operator*() [2/2]

template<int bytes>

NativeInteger< bytes > regina::NativeInteger< bytes >::operator* ( Native other ) const

inline

Multiplies this by the given integer and returns the result.

This integer is not changed.

Parameters

other the integer to multiply by this integer.

Returns: the product this times other.

◆ operator*=() [1/2]

template<int bytes>

NativeInteger< bytes > & regina::NativeInteger< bytes >::operator*= ( const NativeInteger< bytes > & other )

inline

Multiplies the given integer by this.

This integer is changed to reflect the result.

Parameters

other the integer to multiply with this integer.

Returns: a reference to this integer with its new value.

◆ operator*=() [2/2]

template<int bytes>

NativeInteger< bytes > & regina::NativeInteger< bytes >::operator*= ( Native other )

inline

Multiplies the given integer by this.

This integer is changed to reflect the result.

Parameters

other the integer to multiply with this integer.

Returns: a reference to this integer with its new value.

◆ operator+() [1/2]

template<int bytes>

NativeInteger< bytes > regina::NativeInteger< bytes >::operator+ ( const NativeInteger< bytes > & other ) const

inline

Adds this to the given integer and returns the result.

This integer is not changed.

Parameters

other the integer to add to this integer.

Returns: the sum this plus other.

◆ operator+() [2/2]

template<int bytes>

NativeInteger< bytes > regina::NativeInteger< bytes >::operator+ ( Native other ) const

inline

Adds this to the given integer and returns the result.

This integer is not changed.

Parameters

other the integer to add to this integer.

Returns: the sum this plus other.

◆ operator++() [1/2]

template<int bytes>

NativeInteger< bytes > & regina::NativeInteger< bytes >::operator++

inline

The preincrement operator.

This operator increments this integer by one, and returns a reference to the integer after the increment.

Returns: a reference to this integer after the increment.

◆ operator++() [2/2]

template<int bytes>

NativeInteger< bytes > regina::NativeInteger< bytes >::operator++ ( int )

inline

The postincrement operator.

This operator increments this integer by one, and returns a copy of the integer before the increment.

Returns: a copy of this integer before the increment took place.

◆ operator+=() [1/2]

template<int bytes>

NativeInteger< bytes > & regina::NativeInteger< bytes >::operator+= ( const NativeInteger< bytes > & other )

inline

Adds the given integer to this.

This integer is changed to reflect the result.

Parameters

other the integer to add to this integer.

Returns: a reference to this integer with its new value.

◆ operator+=() [2/2]

template<int bytes>

NativeInteger< bytes > & regina::NativeInteger< bytes >::operator+= ( Native other )

inline

Adds the given integer to this.

This integer is changed to reflect the result.

Parameters

other the integer to add to this integer.

Returns: a reference to this integer with its new value.

◆ operator-() [1/3]

template<int bytes>

NativeInteger< bytes > regina::NativeInteger< bytes >::operator-

inline

Determines the negative of this integer.

This integer is not changed.

Returns: the negative of this integer.

◆ operator-() [2/3]

template<int bytes>

NativeInteger< bytes > regina::NativeInteger< bytes >::operator- ( const NativeInteger< bytes > & other ) const

inline

Subtracts the given integer from this and returns the result.

This integer is not changed.

Parameters

other the integer to subtract from this integer.

Returns: the difference this minus other.

◆ operator-() [3/3]

template<int bytes>

NativeInteger< bytes > regina::NativeInteger< bytes >::operator- ( Native other ) const

inline

Subtracts the given integer from this and returns the result.

This integer is not changed.

Parameters

other the integer to subtract from this integer.

Returns: the difference this minus other.

◆ operator--() [1/2]

template<int bytes>

NativeInteger< bytes > & regina::NativeInteger< bytes >::operator--

inline

The predecrement operator.

This operator decrements this integer by one, and returns a reference to the integer after the decrement.

Returns: a reference to this integer after the decrement.

◆ operator--() [2/2]

template<int bytes>

NativeInteger< bytes > regina::NativeInteger< bytes >::operator-- ( int )

inline

The postdecrement operator.

This operator decrements this integer by one, and returns a copy of the integer before the decrement.

Returns: a copy of this integer before the decrement took place.

◆ operator-=() [1/2]

template<int bytes>

NativeInteger< bytes > & regina::NativeInteger< bytes >::operator-= ( const NativeInteger< bytes > & other )

inline

Subtracts the given integer from this.

This integer is changed to reflect the result.

Parameters

other the integer to subtract from this integer.

Returns: a reference to this integer with its new value.

◆ operator-=() [2/2]

template<int bytes>

NativeInteger< bytes > & regina::NativeInteger< bytes >::operator-= ( Native other )

inline

Subtracts the given integer from this.

This integer is changed to reflect the result.

Parameters

other the integer to subtract from this integer.

Returns: a reference to this integer with its new value.

◆ operator/() [1/2]

template<int bytes>

NativeInteger< bytes > regina::NativeInteger< bytes >::operator/ ( const NativeInteger< bytes > & other ) const

inline

Divides this by the given integer and returns the result.

The result will be truncated to an integer, i.e. rounded towards zero. This integer is not changed.

For a division routine that always rounds down, see divisionAlg().

Precondition: other must be non-zero.

Parameters

other the integer to divide this by.

Returns: the quotient this divided by other.

◆ operator/() [2/2]

template<int bytes>

NativeInteger< bytes > regina::NativeInteger< bytes >::operator/ ( Native other ) const

inline

Divides this by the given integer and returns the result.

The result will be truncated to an integer, i.e. rounded towards zero. This integer is not changed.

For a division routine that always rounds down, see divisionAlg().

Precondition: other must be non-zero.

Parameters

other the integer to divide this by.

Returns: the quotient this divided by other.

◆ operator/=() [1/2]

template<int bytes>

NativeInteger< bytes > & regina::NativeInteger< bytes >::operator/= ( const NativeInteger< bytes > & other )

inline

Divides this by the given integer.

The result will be truncated to an integer, i.e. rounded towards zero. This integer is changed to reflect the result.

For a division routine that always rounds down, see divisionAlg().

Precondition: other must be non-zero.

Parameters

other the integer to divide this by.

Returns: a reference to this integer with its new value.

◆ operator/=() [2/2]

template<int bytes>

NativeInteger< bytes > & regina::NativeInteger< bytes >::operator/= ( Native other )

inline

Divides this by the given integer.

The result will be truncated to an integer, i.e. rounded towards zero. This integer is changed to reflect the result.

For a division routine that always rounds down, see divisionAlg().

Precondition: other must be non-zero.

Parameters

other the integer to divide this by.

Returns: a reference to this integer with its new value.

◆ operator<() [1/2]

template<int bytes>

bool regina::NativeInteger< bytes >::operator< ( const NativeInteger< bytes > & rhs ) const

inline

Determines if this is less than the given integer.

Parameters

rhs	the integer with which this will be compared.

Returns: true if and only if this is less than the given integer.

◆ operator<() [2/2]

template<int bytes>

bool regina::NativeInteger< bytes >::operator< ( Native rhs ) const

inline

Determines if this is less than the given integer.

Parameters

rhs	the integer with which this will be compared.

Returns: true if and only if this is less than the given integer.

◆ operator<=() [1/2]

template<int bytes>

bool regina::NativeInteger< bytes >::operator<= ( const NativeInteger< bytes > & rhs ) const

inline

Determines if this is less than or equal to the given integer.

Parameters

rhs	the integer with which this will be compared.

Returns: true if and only if this is less than or equal to the given integer.

◆ operator<=() [2/2]

template<int bytes>

bool regina::NativeInteger< bytes >::operator<= ( Native rhs ) const

inline

Determines if this is less than or equal to the given integer.

Parameters

rhs	the integer with which this will be compared.

Returns: true if and only if this is less than or equal to the given integer.

◆ operator=() [1/2]

template<int bytes>

NativeInteger< bytes > & regina::NativeInteger< bytes >::operator= ( const NativeInteger< bytes > & value )

inline

Sets this integer to the given value.

Parameters

value the new value of this integer.

Returns: a reference to this integer with its new value.

◆ operator=() [2/2]

template<int bytes>

NativeInteger< bytes > & regina::NativeInteger< bytes >::operator= ( Native value )

inline

Sets this integer to the given value.

Parameters

value the new value of this integer.

Returns: a reference to this integer with its new value.

◆ operator==() [1/2]

template<int bytes>

bool regina::NativeInteger< bytes >::operator== ( const NativeInteger< bytes > & rhs ) const

inline

Determines if this is equal to the given integer.

Parameters

rhs	the integer with which this will be compared.

Returns: true if and only if this and the given integer are equal.

◆ operator==() [2/2]

template<int bytes>

bool regina::NativeInteger< bytes >::operator== ( Native rhs ) const

inline

Determines if this is equal to the given integer.

Parameters

rhs	the integer with which this will be compared.

Returns: true if and only if this and the given integer are equal.

◆ operator>() [1/2]

template<int bytes>

bool regina::NativeInteger< bytes >::operator> ( const NativeInteger< bytes > & rhs ) const

inline

Determines if this is greater than the given integer.

Parameters

rhs	the integer with which this will be compared.

Returns: true if and only if this is greater than the given integer.

◆ operator>() [2/2]

template<int bytes>

bool regina::NativeInteger< bytes >::operator> ( Native rhs ) const

inline

Determines if this is greater than the given integer.

Parameters

rhs	the integer with which this will be compared.

Returns: true if and only if this is greater than the given integer.

◆ operator>=() [1/2]

template<int bytes>

bool regina::NativeInteger< bytes >::operator>= ( const NativeInteger< bytes > & rhs ) const

inline

Determines if this is greater than or equal to the given integer.

Parameters

rhs	the integer with which this will be compared.

Returns: true if and only if this is greater than or equal to the given integer.

◆ operator>=() [2/2]

template<int bytes>

bool regina::NativeInteger< bytes >::operator>= ( Native rhs ) const

inline

Determines if this is greater than or equal to the given integer.

Parameters

rhs	the integer with which this will be compared.

Returns: true if and only if this is greater than or equal to the given integer.

◆ sign()

template<int bytes>

int regina::NativeInteger< bytes >::sign

inline

Returns the sign of this integer.

Returns: +1, -1 or 0 according to whether this integer is positive, negative or zero.

◆ swap()

template<int bytes>

void regina::NativeInteger< bytes >::swap ( NativeInteger< bytes > & other )

inlinenoexcept

Swaps the values of this and the given integer.

Parameters

other the integer whose value will be swapped with this.

◆ tryReduce()

template<int bytes>

void regina::NativeInteger< bytes >::tryReduce

inline

A do-nothing routine that ensures that this integer is using a native C/C++ integer representation.

Since the NativeInteger class always uses a native representation, this routine does nothing at all. This routine is simply provided for compatibility with Regina's arbitrary-precision Integer and LargeInteger classes.

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

maths/integer.h

Public Types

Public Member Functions

Detailed Description

Member Typedef Documentation

◆ Native

Constructor & Destructor Documentation

◆ NativeInteger() [1/4]

◆ NativeInteger() [2/4]

◆ NativeInteger() [3/4]

◆ NativeInteger() [4/4]

Member Function Documentation

◆ divByExact() [1/2]

◆ divByExact() [2/2]

◆ divExact() [1/2]

◆ divExact() [2/2]

◆ divisionAlg()

◆ gcd()

◆ gcdWith()

◆ isInfinite()

◆ isZero()

◆ nativeValue()

◆ negate()

◆ operator!=() [1/2]

◆ operator!=() [2/2]

◆ operator%() [1/2]

◆ operator%() [2/2]

◆ operator%=() [1/2]

◆ operator%=() [2/2]

◆ operator*() [1/2]

◆ operator*() [2/2]

◆ operator*=() [1/2]

◆ operator*=() [2/2]

◆ operator+() [1/2]

◆ operator+() [2/2]

◆ operator++() [1/2]

◆ operator++() [2/2]

◆ operator+=() [1/2]

◆ operator+=() [2/2]

◆ operator-() [1/3]

◆ operator-() [2/3]

◆ operator-() [3/3]

◆ operator--() [1/2]

◆ operator--() [2/2]

◆ operator-=() [1/2]

◆ operator-=() [2/2]

◆ operator/() [1/2]

◆ operator/() [2/2]

◆ operator/=() [1/2]

◆ operator/=() [2/2]

◆ operator<() [1/2]

◆ operator<() [2/2]

◆ operator<=() [1/2]

◆ operator<=() [2/2]

◆ operator=() [1/2]

◆ operator=() [2/2]

◆ operator==() [1/2]

◆ operator==() [2/2]

◆ operator>() [1/2]

◆ operator>() [2/2]

◆ operator>=() [1/2]

◆ operator>=() [2/2]

◆ sign()

◆ swap()

◆ tryReduce()