11 #ifndef PQXX_H_SEPARATED_LIST
12 #define PQXX_H_SEPARATED_LIST
14 #include "pqxx/compiler-public.hxx"
15 #include "pqxx/internal/compiler-internal-pre.hxx"
20 #include "pqxx/strconv.hxx"
38 template<
typename ITER,
typename ACCESS>
39 [[nodiscard]]
inline std::string
50 using elt_type =
strip_t<decltype(access(begin))>;
53 std::size_t budget{0};
54 for (ITER cnt{begin}; cnt != end; ++cnt)
55 budget += traits::size_buffer(access(cnt));
57 static_cast<std::size_t
>(std::distance(begin, end)) * std::size(sep);
63 char *stop{here + budget};
64 here = traits::into_buf(here, stop, access(begin)) - 1;
65 for (++begin; begin != end; ++begin)
67 here += sep.copy(here, std::size(sep));
68 here = traits::into_buf(here, stop, access(begin)) - 1;
70 result.resize(
static_cast<std::size_t
>(here -
result.data()));
76 template<
typename ITER>
77 [[nodiscard]]
inline std::string
85 template<
typename CONTAINER>
86 [[nodiscard]]
inline auto
93 ->
typename std::enable_if<
94 (not std::is_void<decltype(std::begin(c))>::value and
95 not std::is_void<decltype(std::end(c))>::value),
104 typename TUPLE, std::size_t INDEX = 0,
typename ACCESS,
105 typename std::enable_if<
106 (INDEX == std::tuple_size<TUPLE>::value - 1),
int>::type = 0>
108 std::string_view , TUPLE
const &t, ACCESS
const &access)
110 return to_string(access(&std::get<INDEX>(t)));
114 typename TUPLE, std::size_t INDEX = 0,
typename ACCESS,
115 typename std::enable_if<
116 (INDEX < std::tuple_size<TUPLE>::value - 1),
int>::type = 0>
117 [[nodiscard]]
inline std::string
118 separated_list(std::string_view sep, TUPLE
const &t, ACCESS
const &access)
120 std::string out{
to_string(access(&std::get<INDEX>(t)))};
122 out.append(separated_list<TUPLE, INDEX + 1>(sep, t, access));
127 typename TUPLE, std::size_t INDEX = 0,
128 typename std::enable_if<
129 (INDEX <= std::tuple_size<TUPLE>::value),
int>::type = 0>
130 [[nodiscard]]
inline std::string
133 return separated_list(sep, t, [](TUPLE
const &tup) {
return *tup; });
138 #include "pqxx/internal/compiler-internal-post.hxx"