readme.txt

usage example:

in `your_library.h`:

    #pragma once
    #include "snct_constraints.hpp"
    
    namespace your
    {
        using Divisor = snct::Constrained<double, snct::Not<0.0>, snct::Finite>;
        
        double inverse(Divisor d);
    }

in `your_library.cpp`:

    #include "your_library.h"
    
    namespace your
    {
        double inverse(Divisor d)
        {
            return 1/d; //no error handling - all possible values of d are valid for division.
        }
    }

in user `main.cpp`:

    #include your_library.h
    
    int main()
    {
        if constexpr(exceptions_enabled)
        {
            return inverse(0.25); //will throw snct::Constraint_Exception if 0.25 is not a valid Divisor
        }
        else
        {
            auto optional_divisor = your::Divisor::factory(0.25);   // returns std::nullopt_t if 0.25 is
                                                                    // not a valid your::Divisor
            if(optional_divisor)
                return inverse(*optional_divisor);
            else
                /*do your preferred non-exceptional error handling*/;
        }
    }