TupleBase.h

/*
 
MIT License
 
Copyright (c) 2017 FMI Open Development / Markus Peura, first.last@fmi.fi
 
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
 
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
 
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
 
*/
/*
Part of Rack development has been done in the BALTRAD projects part-financed
by the European Union (European Regional Development Fund and European
Neighbourhood Partnership Instrument, Baltic Sea Region Programme 2007-2013)
*/
 
 
#ifndef DRAIN_TUPLE_BASE
#define DRAIN_TUPLE_BASE
 
#include <cstddef>
#include <iostream>
#include <sstream>
#include <typeinfo>
#include <stdexcept>
#include <string>
//#include <set>
 
#include "StringBuilder.h"
#include "Type.h"  // TypeName
 
namespace drain {
 
 
// Consider inheritance TupleType->TupleBase, so all S-typed stuff here?
template <typename S>
struct TupleType {
 
 
    static
    const S neutral_value;
};
 
template <typename S>
const S TupleType<S>::neutral_value(0);
 
 
template <typename S, size_t N=2>
class TupleBase {
 
public:
 
    typedef TupleBase<S,N> tuplebase_t;
    typedef S value_type;
 
    typedef S* iterator;
    typedef S const* const_iterator;
 
    static const size_t storageTypeSize;
 
    TupleBase(){};
 
    virtual
    ~TupleBase(){};
 
 
    static inline
    size_t size(){
        return N;
    }
 
    virtual
    const_iterator begin() const = 0;
 
    virtual
    const_iterator end() const = 0;
 
    virtual
    iterator begin() = 0;
 
    virtual
    iterator end() = 0;
 
 
    const S & at(size_t i) const {
        //(std::stringstream("UniTuple: ") << __FUNCTION__).r
        if (i<N)
            return *(begin() + i);
        else {
            /*
            std::stringstream sstr;
            sstr << // TypeName<tuple_t>::str() << ':' <<
                    __FUNCTION__ << " index overflow:" << i;
            throw std::runtime_error(sstr.str());
            */
            throw std::runtime_error(StringBuilder<' '>(__FUNCTION__, "index overflow:", i));
        }
    }
 
    const S & operator[](size_t i) const {
        return at(i);
    }
 
 
    S & at(size_t i){
        if (i<N)
            return *(begin() + i);
        else {
            /*
            std::stringstream sstr;
            sstr << // << TypeName<tuple_t>::str() << ':'
             __FUNCTION__ << " index overflow:" << i;
            throw std::runtime_error(sstr.str());
            */
            throw std::runtime_error(StringBuilder<' '>(__FUNCTION__, "index overflow:", i));
        }
    }
 
    S & operator[](size_t i){
        return at(i);
    }
 
 
    bool operator==(const tuplebase_t &t) const {
        const_iterator it  = begin();
        const_iterator tit = t.begin();
        while (it != end()){
            if (*it != *tit)
                return false;
            ++it;
            ++tit;
        }
        return true;
    }
 
 
    bool operator==(const value_type &t) const {
        //
        for (const auto e: *this){
            if (e != t){
                return false;
            }
        }
        /*
         * const_iterator it  = begin();
        while (it != end()){
            if (*it != t)
                return false;
            ++it;
        }*/
        return true;
    }
 
 
    bool operator!=(const tuplebase_t &t) const {
        return !(*this == t);
    }
 
    template <class T>
    T & toSequence(T & sequence) const {
        sequence.clear();
        for (const_iterator it = begin(); it != end(); ++it){
            sequence.insert(sequence.end(), *it);
        }
        return sequence;
    }
 
 
 
    //tuple_t & set(const tuple_t & t){
    void set(const tuplebase_t & t){
        if (&t != this){
            this->assignSequence(t);
        }
        // this->assign(t);
        /*
        if (&t != &this->tuple()){
            this->assign(t);
        }
        */
        //return *this;
    }
 
    template <class T2, size_t N2=2>
    //tuple_t & set(const UniTuple<T2,N2> & t){
    //void set(const UniTuple<T2,N2> & t){
    void set(const TupleBase<T2,N2> & t){
        /*
        if (&t == this){
            throw std::runtime_error(StringBuilder<>(__FILE__, ':', __FUNCTION__, ": self-assignment violation: ", t, " [", drain::TypeName<TupleBase<T2,N2> >::str(), "]"));
        }
        */
        this->assignSequence(t, true); // by default LENIENT, or how should it be?
        // return *this;
    }
 
 
    inline
    void set(const S & arg) {
        setIndexed(0, arg);
        this->updateTuple();
    }
 
    // Variadic-argument member set function.
    // https://en.cppreference.com/w/cpp/language/parameter_pack
    template<typename ... SS>
    inline
    void set(const S & arg, const SS &... rest) {
        setIndexed(0, arg, rest...);
        this->updateTuple();
    }
 
    template<typename T>
    inline
    void set(std::initializer_list<T> l){
        this->assignSequence(l);
    }
 
 
    /*
    tuplebase_t & assign(const tuplebase_t & t){
        if (&t != this){
            this->assignSequence(t);
        }
        return *this;
    }
 
    tuplebase_t & assign(const value_type & value){
        this->fill(value);
        updateTuple();
        return *this;
    }
     */
 
 
    template <class T>
    tuplebase_t & assignSequence(T & sequence, bool LENIENT = false){
        typename T::const_iterator cit = sequence.begin();
        iterator it = begin();
        while (cit != sequence.end()){
            if (it == end()){
                if (LENIENT){
                    return *this;
                }
                else {
                    throw std::runtime_error(StringBuilder<':'>(__FILE__, ':', __FUNCTION__, ": index overflow in assigning: ", *cit));
                    /*
                    std::stringstream sstr;
                    sstr << __FILE__ << ':' << __FUNCTION__ << ": run out of indices in assigning: " << *cit;
                    throw std::runtime_error(sstr.str());
                    */
                }
                break;
            }
            //  break;
            *it = *cit;
            ++it;
            ++cit;
        }
        return *this;
    }
 
 
    void fill(S i){
        for (iterator it = begin(); it != end(); ++it){
            *it = i;
        }
    }
 
    inline
    void clear(){
        fill(S());
    }
 
 
    virtual
    std::ostream & toStream(std::ostream & ostr, char separator=',') const {
        char sep = 0;
        for (const_iterator it = begin(); it != end(); ++it){
            if (sep)
                ostr << sep;
            else
                sep = separator;
            ostr << *it; //(*this)[i];
        }
        return ostr;
    }
 
    std::string toStr(char separator=',') const {
        std::stringstream sstr;
        toStream(sstr, separator);
        return sstr.str();
    }
 
 
// protected?
 
    // AreaGeom etc.
    virtual inline
    void updateTuple(){};
 
 
protected:
 
    void setIndexed(size_t i){
        //std::cout << __FUNCTION__ << " complete " << i << '\n';
        this->updateTuple();
    }
 
    template<typename T2, typename ... TT>
    void setIndexed(size_t i, T2 arg, const TT &... rest){
        if (i>=N){
            throw std::runtime_error(StringBuilder<>(__FILE__, ':', __FUNCTION__, ": index (", i, ")  overflow in assigning: ", arg, ",..."));
            return;
        }
        // std::cout << __FUNCTION__ << "N=" << N << " arg=" << arg << " remaining:" << i << std::endl;
        this->at(i) = static_cast<S>(arg);
        setIndexed(i+1, rest...);
    }
 
};
 
 
template <typename S, size_t N>
const size_t TupleBase<S,N>::storageTypeSize = sizeof(S);
 
 
template <class S, size_t N>
std::ostream & operator<<(std::ostream & ostr, const TupleBase<S,N> & tuple){
    return tuple.toStream(ostr);
}
 
 
template <typename S, size_t N>
struct TypeName<TupleBase<S,N> > {
 
    static const std::string & str(){
        if (N == 0){
            static const std::string name = drain::StringBuilder<>("PseudoTuple<", drain::TypeName<S>::str(),',' , drain::TypeName<S>::str(),">");
            return name;
        }
        else {
            static const std::string name = drain::StringBuilder<>("PseudoTuple<", drain::TypeName<S>::str(),',' , drain::TypeName<S>::str(),',' , N, ">");
            return name;
        }
    }
 
};
 
 
 
}  // drain
 
 
#endif