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This is a debugging tool which is useful when dealing with number types.
NT1 must be a model of some algebraic structure concept. NT2 must be a model of the same algebraic structure concept. NT1 and NT2 must be FromDoubleConstructible. Comparator has to be a model of a binary predicate taking NT1 as first argument, and NT2 as second. The Comparator parameter has a default value which is a functor calling operator== between the two arguments.
#include <CGAL/Number_type_checker.h>
| Number_type_checker<NT1,NT2,Comparator> c; | |
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introduces an uninitialized variable c.
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| Number_type_checker<NT1,NT2,Comparator> c ( int i); | |
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introduces the integral value i.
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| Number_type_checker<NT1,NT2,Comparator> c ( double d); | |
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introduces the floating point value d.
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| Number_type_checker<NT1,NT2,Comparator> c ( NT1 n1, NT2 n2); | |
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introduces a variable storing the pair n1, n2.
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Some operations have a particular behavior documented here.
| NT1 | c.n1 () const | returns a const reference to the object of type NT1. |
| NT2 | c.n2 () const | returns a const reference to the object of type NT2. |
| NT1 & | c.n1 () | returns a reference to the object of type NT1. |
| NT2 & | c.n2 () | returns a reference to the object of type NT2. |
| bool | c.is_valid () const | calls the Comparator binary predicate on the two stored objects and returns its result. |
| std::ostream& | std::ostream& out << Number_type_checker c | |
| writes c.n1() to the ostream out. | ||
| std::istream& | std::istream& in >> Number_type_checker& c | |
| reads an NT1 from in, then converts it to an NT2, so a conversion from NT1 to NT2 is required here. | ||