stringutils.hpp

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#ifndef VMCMC_STRINGUTILS_H_
#define VMCMC_STRINGUTILS_H_

#include <vmcmc/typetraits.hpp>

#include <sstream>
#include <string>
#include <utility>

namespace vmcmc
{

class Sample;

template <typename SequenceT, typename SeparatorT>
inline std::ostream& join(std::ostream& stream, const SequenceT& sequence, const SeparatorT& separator = "")
{
    auto itBegin = std::begin(sequence);
    auto itEnd = std::end(sequence);

    if (itBegin != itEnd) {
        stream << *itBegin;
        ++itBegin;
    }

    for (; itBegin != itEnd; ++itBegin) {
        stream << separator << *itBegin;
    }

    return stream;
}

template <typename SequenceT, typename SeparatorT>
inline std::string join(const SequenceT& sequence, const SeparatorT& separator, int floatPrecision = -1)
{
    std::ostringstream strm;
    if (floatPrecision > -1)
        strm.precision(floatPrecision);
    join(strm, sequence, separator);
    return strm.str();
}

std::ostream& operator<< (std::ostream& strm, const Sample& sample);

template <typename T1, typename T2>
inline std::ostream& operator<< (std::ostream& strm, const std::pair<T1, T2>& pair)
{
    strm << "(" << pair.first << ", " << pair.second << ")";
    return strm;
}

template <typename ContainerT, class = typename std::enable_if<vmcmc::is_container<ContainerT>::value>::type>
inline std::ostream& operator<< (std::ostream& strm, const ContainerT& container)
{
    strm << "[" << container.size() << "](";

    auto itBegin = std::begin(container);
    auto itEnd = std::end(container);

    if (itBegin != itEnd) {
        strm << *itBegin;
        itBegin++;
    }

    for (; itBegin != itEnd; ++itBegin) {
        strm << ", " << *itBegin;
    }

    strm << ")";

    return strm;
}

}

#endif /* VMCMC_STRINGUTILS_H_ */