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ome::xml::model::primitives::ConstrainedNumeric< N, C, E > Class Template Reference

A numeric type constrained to a subrange (or subranges) of its range limits. More...

#include <ome/xml/model/primitives/ConstrainedNumeric.h>

+ Inheritance diagram for ome::xml::model::primitives::ConstrainedNumeric< N, C, E >:
+ Collaboration diagram for ome::xml::model::primitives::ConstrainedNumeric< N, C, E >:

Public Types

typedef N value_type
 The type to constrain.
 
typedef C constraint_type
 The constraint to impose.
 
typedef E error_policy_type
 The error policy to apply on constraint violation.
 

Public Member Functions

 ConstrainedNumeric ()
 Construct a ConstrainedNumeric. More...
 
 ConstrainedNumeric (value_type value)
 Construct a ConstrainedNumeric from an unconstrained value. More...
 
 ConstrainedNumeric (const std::string &value)
 Construct a ConstrainedNumeric a string value. More...
 
 ConstrainedNumeric (const ConstrainedNumeric &value)
 Copy constructor. More...
 
 operator value_type () const
 Obtain the constrained value as the unconstrained type. More...
 
ConstrainedNumericoperator= (const ConstrainedNumeric &value)
 Assign the constrained value from a constrained value. More...
 
ConstrainedNumericoperator= (const value_type &value)
 Assign the constrained value from an unconstrained value. More...
 
ConstrainedNumericoperator+= (const ConstrainedNumeric &value)
 Add a constrained value to the constrained value. More...
 
ConstrainedNumericoperator-= (const ConstrainedNumeric &value)
 Subtract a constrained value from the constrained value. More...
 
ConstrainedNumericoperator*= (const ConstrainedNumeric &value)
 Multiply the constrained value by a constrained value. More...
 
ConstrainedNumericoperator/= (const ConstrainedNumeric &value)
 Divide the constrained value by a constrained value. More...
 
ConstrainedNumericoperator%= (const ConstrainedNumeric &value)
 Modulo of the constrained value by a constrained value. More...
 
ConstrainedNumericoperator+= (const value_type &value)
 Add an unconstrained value to the constrained value. More...
 
ConstrainedNumericoperator-= (const value_type &value)
 Subtract an unconstrained value from the constrained value. More...
 
ConstrainedNumericoperator*= (const value_type &value)
 Multiply the constrained value by an unconstrained value. More...
 
ConstrainedNumericoperator/= (const value_type &value)
 Divide the constrained value by an constrained value. More...
 
ConstrainedNumericoperator%= (const value_type &value)
 Modulo of the constrained value by an unconstrained value. More...
 
ConstrainedNumericoperator++ ()
 Increment the constrained value by one. More...
 
ConstrainedNumericoperator-- ()
 Decrement the constrained value by one. More...
 
bool operator< (const ConstrainedNumeric &value) const
 Check if the constrained value is less than a constrained value. More...
 
bool operator< (const value_type &value) const
 Check if the constrained value is less than an unconstrained value. More...
 
bool operator> (const value_type &value) const
 Check if the constrained value is greater than an unconstrained value. More...
 
bool operator== (const ConstrainedNumeric &value) const
 Check if the constrained value is equal to a constrained value. More...
 
bool operator== (const value_type &value) const
 Check if the constrained value is equal to an unconstrained value. More...
 

Static Public Attributes

static const value_type default_value
 Default value for default construction.
 

Private Member Functions

void check ()
 Check that the set value meets the required constraints, and if it does not, handle this according to the configured error policy (defaulting to throwing a std::illegal_argument exception).
 

Private Attributes

value_type value
 The value being constrained.
 

Static Private Attributes

static const std::string typestr
 The name of the type. Used for diagnostics only.
 

Friends

template<class _charT , class _traits , typename _N , typename _C , typename _E >
std::basic_istream< _charT, _traits > & operator>> (std::basic_istream< _charT, _traits > &is, ConstrainedNumeric< _N, _C, _E > &value)
 Set constrained value from input stream. More...
 

Detailed Description

template<typename N, typename C, typename E = ConstrainedNumericError>
class ome::xml::model::primitives::ConstrainedNumeric< N, C, E >

A numeric type constrained to a subrange (or subranges) of its range limits.

This templated class is specialised using a numeric (value) type to specify the type to be constrained, a constraint type to provide a constraint check (a function object) and an error policy type to handle errors when the constraint check fails (a function object). The default error policy is to throw an std::invalid_argument exception.

A ConstrainedNumeric instance should behave almost identically to and be directly subsitutable for the constrained value type. It is constructable using the value type and implicitly castable to the value type. It is also constructable from the string representation of the value type, and may be serialised to and from any stream. It also implements the standard numeric operators, so may be used as though it were the value type.

The default value for most template specialisations is 0 for integer types or 0.0 for floating point types. For types whose constraint would not allow zero as the default value, the default value is 1 for integer types or 1.0 for floating point types.

Template Parameters
Nthe type to constrain.
Cthe constraint to impose.
Ethe error policy to apply on constraint violation.

Constructor & Destructor Documentation

template<typename N, typename C, typename E = ConstrainedNumericError>
ome::xml::model::primitives::ConstrainedNumeric< N, C, E >::ConstrainedNumeric ( )
inline

Construct a ConstrainedNumeric.

Note that the ConstrainedNumeric value will be set to the default constructed value of the constrained value type. If this value fails the constraint check, an an error will be triggered according to the error policy, so not all ConstrainedNumeric types are safely default constructable.

References ome::xml::model::primitives::ConstrainedNumeric< N, C, E >::check().

template<typename N, typename C, typename E = ConstrainedNumericError>
ome::xml::model::primitives::ConstrainedNumeric< N, C, E >::ConstrainedNumeric ( value_type  value)
inline

Construct a ConstrainedNumeric from an unconstrained value.

An exception may be thrown if the value does not meet the constraints.

Parameters
valuethe unconstrained value to set.

References ome::xml::model::primitives::ConstrainedNumeric< N, C, E >::check().

template<typename N, typename C, typename E = ConstrainedNumericError>
ome::xml::model::primitives::ConstrainedNumeric< N, C, E >::ConstrainedNumeric ( const std::string &  value)
inline

Construct a ConstrainedNumeric a string value.

An exception may be thrown if the value does not meet the constraints.

Parameters
valuethe string value to set.

References ome::xml::model::primitives::ConstrainedNumeric< N, C, E >::check(), and ome::xml::model::primitives::ConstrainedNumeric< N, C, E >::typestr.

template<typename N, typename C, typename E = ConstrainedNumericError>
ome::xml::model::primitives::ConstrainedNumeric< N, C, E >::ConstrainedNumeric ( const ConstrainedNumeric< N, C, E > &  value)
inline

Copy constructor.

Parameters
valuethe constrained value to copy.

References ome::xml::model::primitives::ConstrainedNumeric< N, C, E >::check().

Member Function Documentation

template<typename N, typename C, typename E = ConstrainedNumericError>
ome::xml::model::primitives::ConstrainedNumeric< N, C, E >::operator value_type ( ) const
inline

Obtain the constrained value as the unconstrained type.

Returns
the constrained value.

References ome::xml::model::primitives::ConstrainedNumeric< N, C, E >::value.

template<typename N, typename C, typename E = ConstrainedNumericError>
ConstrainedNumeric& ome::xml::model::primitives::ConstrainedNumeric< N, C, E >::operator%= ( const ConstrainedNumeric< N, C, E > &  value)
inline

Modulo of the constrained value by a constrained value.

If the new value fails the constraint check, this will cause an error.

Parameters
valuethe value to compute the modulus with.
Returns
the new value.

References ome::xml::model::primitives::ConstrainedNumeric< N, C, E >::check(), and ome::xml::model::primitives::ConstrainedNumeric< N, C, E >::value.

template<typename N, typename C, typename E = ConstrainedNumericError>
ConstrainedNumeric& ome::xml::model::primitives::ConstrainedNumeric< N, C, E >::operator%= ( const value_type value)
inline

Modulo of the constrained value by an unconstrained value.

If the new value fails the constraint check, this will cause an error.

Parameters
valuethe value to compute the modulus with.
Returns
the new value.

References ome::xml::model::primitives::ConstrainedNumeric< N, C, E >::check(), and ome::xml::model::primitives::ConstrainedNumeric< N, C, E >::value.

template<typename N, typename C, typename E = ConstrainedNumericError>
ConstrainedNumeric& ome::xml::model::primitives::ConstrainedNumeric< N, C, E >::operator*= ( const ConstrainedNumeric< N, C, E > &  value)
inline

Multiply the constrained value by a constrained value.

If the new value fails the constraint check, this will cause an error.

Parameters
valuethe value to multiply.
Returns
the new value.

References ome::xml::model::primitives::ConstrainedNumeric< N, C, E >::check(), and ome::xml::model::primitives::ConstrainedNumeric< N, C, E >::value.

template<typename N, typename C, typename E = ConstrainedNumericError>
ConstrainedNumeric& ome::xml::model::primitives::ConstrainedNumeric< N, C, E >::operator*= ( const value_type value)
inline

Multiply the constrained value by an unconstrained value.

If the new value fails the constraint check, this will cause an error.

Parameters
valuethe value to multiply.
Returns
the new value.

References ome::xml::model::primitives::ConstrainedNumeric< N, C, E >::check(), and ome::xml::model::primitives::ConstrainedNumeric< N, C, E >::value.

template<typename N, typename C, typename E = ConstrainedNumericError>
ConstrainedNumeric& ome::xml::model::primitives::ConstrainedNumeric< N, C, E >::operator++ ( )
inline

Increment the constrained value by one.

If the new value fails the constraint check, this will cause an error.

Returns
the new value.

References ome::xml::model::primitives::ConstrainedNumeric< N, C, E >::check(), and ome::xml::model::primitives::ConstrainedNumeric< N, C, E >::value.

template<typename N, typename C, typename E = ConstrainedNumericError>
ConstrainedNumeric& ome::xml::model::primitives::ConstrainedNumeric< N, C, E >::operator+= ( const ConstrainedNumeric< N, C, E > &  value)
inline

Add a constrained value to the constrained value.

If the new value fails the constraint check, this will cause an error.

Parameters
valuethe value to add.
Returns
the new value.

References ome::xml::model::primitives::ConstrainedNumeric< N, C, E >::check(), and ome::xml::model::primitives::ConstrainedNumeric< N, C, E >::value.

template<typename N, typename C, typename E = ConstrainedNumericError>
ConstrainedNumeric& ome::xml::model::primitives::ConstrainedNumeric< N, C, E >::operator+= ( const value_type value)
inline

Add an unconstrained value to the constrained value.

If the new value fails the constraint check, this will cause an error.

Parameters
valuethe value to add.
Returns
the new value.

References ome::xml::model::primitives::ConstrainedNumeric< N, C, E >::check(), and ome::xml::model::primitives::ConstrainedNumeric< N, C, E >::value.

template<typename N, typename C, typename E = ConstrainedNumericError>
ConstrainedNumeric& ome::xml::model::primitives::ConstrainedNumeric< N, C, E >::operator-- ( )
inline

Decrement the constrained value by one.

If the new value fails the constraint check, this will cause an error.

Returns
the new value.

References ome::xml::model::primitives::ConstrainedNumeric< N, C, E >::check(), and ome::xml::model::primitives::ConstrainedNumeric< N, C, E >::value.

template<typename N, typename C, typename E = ConstrainedNumericError>
ConstrainedNumeric& ome::xml::model::primitives::ConstrainedNumeric< N, C, E >::operator-= ( const ConstrainedNumeric< N, C, E > &  value)
inline

Subtract a constrained value from the constrained value.

If the new value fails the constraint check, this will cause an error.

Parameters
valuethe value to subtract.
Returns
the new value.

References ome::xml::model::primitives::ConstrainedNumeric< N, C, E >::check(), and ome::xml::model::primitives::ConstrainedNumeric< N, C, E >::value.

template<typename N, typename C, typename E = ConstrainedNumericError>
ConstrainedNumeric& ome::xml::model::primitives::ConstrainedNumeric< N, C, E >::operator-= ( const value_type value)
inline

Subtract an unconstrained value from the constrained value.

If the new value fails the constraint check, this will cause an error.

Parameters
valuethe value to subtract.
Returns
the new value.

References ome::xml::model::primitives::ConstrainedNumeric< N, C, E >::check(), and ome::xml::model::primitives::ConstrainedNumeric< N, C, E >::value.

template<typename N, typename C, typename E = ConstrainedNumericError>
ConstrainedNumeric& ome::xml::model::primitives::ConstrainedNumeric< N, C, E >::operator/= ( const ConstrainedNumeric< N, C, E > &  value)
inline

Divide the constrained value by a constrained value.

If the new value fails the constraint check, this will cause an error.

Parameters
valuethe value to divide.
Returns
the new value.

References ome::xml::model::primitives::ConstrainedNumeric< N, C, E >::check(), and ome::xml::model::primitives::ConstrainedNumeric< N, C, E >::value.

template<typename N, typename C, typename E = ConstrainedNumericError>
ConstrainedNumeric& ome::xml::model::primitives::ConstrainedNumeric< N, C, E >::operator/= ( const value_type value)
inline

Divide the constrained value by an constrained value.

If the new value fails the constraint check, this will cause an error.

Parameters
valuethe value to divide.
Returns
the new value.

References ome::xml::model::primitives::ConstrainedNumeric< N, C, E >::check(), and ome::xml::model::primitives::ConstrainedNumeric< N, C, E >::value.

template<typename N, typename C, typename E = ConstrainedNumericError>
bool ome::xml::model::primitives::ConstrainedNumeric< N, C, E >::operator< ( const ConstrainedNumeric< N, C, E > &  value) const
inline

Check if the constrained value is less than a constrained value.

Parameters
valuethe value to compare with.
Returns
true if the condition is true, else false.

References ome::xml::model::primitives::ConstrainedNumeric< N, C, E >::value.

template<typename N, typename C, typename E = ConstrainedNumericError>
bool ome::xml::model::primitives::ConstrainedNumeric< N, C, E >::operator< ( const value_type value) const
inline

Check if the constrained value is less than an unconstrained value.

Parameters
valuethe value to compare with.
Returns
true if the condition is true, else false.

References ome::xml::model::primitives::ConstrainedNumeric< N, C, E >::value.

template<typename N, typename C, typename E = ConstrainedNumericError>
ConstrainedNumeric& ome::xml::model::primitives::ConstrainedNumeric< N, C, E >::operator= ( const ConstrainedNumeric< N, C, E > &  value)
inline

Assign the constrained value from a constrained value.

While constraint checks are enforced, this should never cause an error due to the value having been previously checked.

Parameters
valuethe value to assign.
Returns
the new value.

References ome::xml::model::primitives::ConstrainedNumeric< N, C, E >::check(), and ome::xml::model::primitives::ConstrainedNumeric< N, C, E >::value.

template<typename N, typename C, typename E = ConstrainedNumericError>
ConstrainedNumeric& ome::xml::model::primitives::ConstrainedNumeric< N, C, E >::operator= ( const value_type value)
inline

Assign the constrained value from an unconstrained value.

If the value fails the constraint check, this will cause an error.

Parameters
valuethe value to assign.
Returns
the new value.

References ome::xml::model::primitives::ConstrainedNumeric< N, C, E >::check(), and ome::xml::model::primitives::ConstrainedNumeric< N, C, E >::value.

template<typename N, typename C, typename E = ConstrainedNumericError>
bool ome::xml::model::primitives::ConstrainedNumeric< N, C, E >::operator== ( const ConstrainedNumeric< N, C, E > &  value) const
inline

Check if the constrained value is equal to a constrained value.

Parameters
valuethe value to compare with.
Returns
true if the condition is true, else false.

References ome::xml::model::primitives::ConstrainedNumeric< N, C, E >::value.

template<typename N, typename C, typename E = ConstrainedNumericError>
bool ome::xml::model::primitives::ConstrainedNumeric< N, C, E >::operator== ( const value_type value) const
inline

Check if the constrained value is equal to an unconstrained value.

Parameters
valuethe value to compare with.
Returns
true if the condition is true, else false.

References ome::xml::model::primitives::ConstrainedNumeric< N, C, E >::value.

template<typename N, typename C, typename E = ConstrainedNumericError>
bool ome::xml::model::primitives::ConstrainedNumeric< N, C, E >::operator> ( const value_type value) const
inline

Check if the constrained value is greater than an unconstrained value.

Parameters
valuethe value to compare with.
Returns
true if the condition is true, else false.

References ome::xml::model::primitives::ConstrainedNumeric< N, C, E >::value.

Friends And Related Function Documentation

template<typename N, typename C, typename E = ConstrainedNumericError>
template<class _charT , class _traits , typename _N , typename _C , typename _E >
std::basic_istream<_charT,_traits>& operator>> ( std::basic_istream< _charT, _traits > &  is,
ConstrainedNumeric< _N, _C, _E > &  value 
)
friend

Set constrained value from input stream.

Parameters
isthe input stream.
valuethe value to set.
Returns
the input stream.

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