81 lines
1.5 KiB
C++
81 lines
1.5 KiB
C++
#ifndef PGSQL_COL_H
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#define PGSQL_COL_H
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#include "Pgsql_Row.h"
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#include <boost/container/small_vector.hpp>
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namespace Pgsql {
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class Col {
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public:
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explicit Col(const Pgsql::Row &r)
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: row(r)
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{}
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void reset() { col = -1; }
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Pgsql::Value nextValue()
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{
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return row.get(++col);
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}
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void skip(int n = 1)
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{
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col += n;
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}
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template <typename E, typename I>
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Col& getAsArray(I insert_iter, NullHandling nullhandling = NullHandling::Throw)
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{
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nextValue().getAsArray<E, I>(insert_iter, nullhandling);
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return *this;
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}
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template <typename E, typename I>
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Col& getAsArray(I insert_iter, const E &value_for_nulls)
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{
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nextValue().getAsArray<E, I>(insert_iter, value_for_nulls);
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return *this;
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}
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template <typename E, typename I>
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Col& getAsArrayOfOptional(I insert_iter)
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{
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nextValue().getAsArrayOfOptional<E, I>(insert_iter);
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return *this;
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}
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template <typename E, typename I>
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Col& getAsVector(I insert_iter)
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{
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nextValue().getAsVector<E, I>(insert_iter);
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return *this;
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}
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private:
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const Pgsql::Row &row;
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int col = -1;
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};
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template <typename T>
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Col& operator>>(Col &c, std::vector<T> &s)
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{
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return c.getAsArray<T>(std::back_inserter(s));
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}
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template <typename T, std::size_t N>
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Col& operator>>(Col &c, boost::container::small_vector<T, N> &s)
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{
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return c.getAsArray<T>(std::back_inserter(s));
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}
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template <typename T>
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Col& operator>>(Col &c, T &s)
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{
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s << c.nextValue();
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return c;
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}
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} // end namespace Pgsql
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#endif // PGSQL_COL_H
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