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https://github.com/bolero-MURAKAMI/Sprout.git
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rewrite string concat
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bolero-MURAKAMI
parent
165b9ee1cd
commit
22f13db2a0
1 changed files with 145 additions and 46 deletions
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@ -4,64 +4,163 @@
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#include <cstddef>
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#include <type_traits>
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#include <sprout/config.hpp>
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#include <sprout/index_tuple.hpp>
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#include <sprout/string/char_traits.hpp>
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#include <sprout/string/string.hpp>
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#include <sprout/operation/fixed/push_back.hpp>
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#include <sprout/operation/fixed/push_front.hpp>
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#include <sprout/operation/fixed/append_back.hpp>
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#include <sprout/operation/fixed/append_front.hpp>
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//#include <sprout/operation/fixed/push_back.hpp>
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//#include <sprout/operation/fixed/push_front.hpp>
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//#include <sprout/operation/fixed/append_back.hpp>
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//#include <sprout/operation/fixed/append_front.hpp>
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namespace sprout {
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namespace detail {
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template<typename T, std::size_t N, typename Traits, sprout::index_t... Indexes>
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inline SPROUT_CONSTEXPR sprout::basic_string<T, N + 1, Traits>
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string_concat(
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sprout::basic_string<T, N, Traits> const& lhs,
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std::size_t lsize,
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T const& rhs,
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sprout::index_tuple<Indexes...>
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)
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{
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return sprout::basic_string<T, N + 1, Traits>{
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{
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(Indexes < lsize ? lhs[Indexes]
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: Indexes < lsize + 1 ? rhs
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: T()
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)...
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},
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lsize + 1
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};
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}
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template<typename T, std::size_t N, typename Traits, sprout::index_t... Indexes>
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inline SPROUT_CONSTEXPR sprout::basic_string<T, 1 + N, Traits>
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string_concat(
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T const& lhs,
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sprout::basic_string<T, N, Traits> const& rhs,
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std::size_t rsize,
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sprout::index_tuple<Indexes...>
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)
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{
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return sprout::basic_string<T, 1 + N, Traits>{
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{
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(Indexes < 1 ? lhs
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: Indexes < 1 + rsize ? rhs[Indexes - 1]
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: T()
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)...
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},
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1 + rsize
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};
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}
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template<typename T, std::size_t N, typename Traits, std::size_t M, sprout::index_t... Indexes>
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inline SPROUT_CONSTEXPR sprout::basic_string<T, N + (M - 1), Traits>
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string_concat(
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sprout::basic_string<T, N, Traits> const& lhs,
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std::size_t lsize,
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T const (& rhs)[M],
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std::size_t rsize,
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sprout::index_tuple<Indexes...>
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)
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{
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return sprout::basic_string<T, N + (M - 1), Traits>{
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{
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(Indexes < lsize ? lhs[Indexes]
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: Indexes < lsize + rsize ? rhs[Indexes - lsize]
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: T()
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)...
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},
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lsize + rsize
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};
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}
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template<typename T, std::size_t N, typename Traits, std::size_t M, sprout::index_t... Indexes>
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inline SPROUT_CONSTEXPR sprout::basic_string<T, (M - 1) + N, Traits>
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string_concat(
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T const (& lhs)[M],
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std::size_t lsize,
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sprout::basic_string<T, N, Traits> const& rhs,
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std::size_t rsize,
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sprout::index_tuple<Indexes...>
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)
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{
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return sprout::basic_string<T, (M - 1) + N, Traits>{
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{
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(Indexes < lsize ? lhs[Indexes]
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: Indexes < lsize + rsize ? rhs[Indexes - lsize]
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: T()
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)...
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},
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lsize + rsize
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};
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}
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template<typename T, std::size_t N1, std::size_t N2, typename Traits, sprout::index_t... Indexes>
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inline SPROUT_CONSTEXPR sprout::basic_string<T, N1 + N2, Traits>
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string_concat(
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sprout::basic_string<T, N1, Traits> const& lhs,
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std::size_t lsize,
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sprout::basic_string<T, N2, Traits> const& rhs,
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std::size_t rsize,
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sprout::index_tuple<Indexes...>
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)
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{
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return sprout::basic_string<T, N1 + N2, Traits>{
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{
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(Indexes < lsize ? lhs[Indexes]
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: Indexes < lsize + rsize ? rhs[Indexes - lsize]
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: T()
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)...
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},
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lsize + rsize
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};
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}
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} // namespace detail
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//
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// operator+
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//
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template<typename T, std::size_t N, typename Traits>
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inline SPROUT_CONSTEXPR typename sprout::fixed::result_of::push_back<sprout::basic_string<T, N, Traits>, T>::type operator+(
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sprout::basic_string<T, N, Traits> const& lhs,
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T const& rhs
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)
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{
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return sprout::fixed::push_back(lhs, rhs);
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inline SPROUT_CONSTEXPR sprout::basic_string<T, N + 1, Traits>
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operator+(sprout::basic_string<T, N, Traits> const& lhs, T const& rhs) {
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return sprout::detail::string_concat(
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lhs, lhs.size(),
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rhs,
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sprout::index_range<0, N + 1>::make()
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);
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}
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template<typename T, std::size_t N, typename Traits>
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inline SPROUT_CONSTEXPR typename sprout::fixed::result_of::push_front<sprout::basic_string<T, N, Traits>, T>::type operator+(
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T const& lhs,
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sprout::basic_string<T, N, Traits> const& rhs
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)
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{
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return sprout::fixed::push_front(rhs, lhs);
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inline SPROUT_CONSTEXPR sprout::basic_string<T, 1 + N, Traits>
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operator+(T const& lhs, sprout::basic_string<T, N, Traits> const& rhs) {
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return sprout::detail::string_concat(
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lhs,
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rhs, rhs.size(),
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sprout::index_range<0, 1 + N>::make()
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);
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}
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template<typename T, std::size_t N, typename Traits, std::size_t N2>
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inline SPROUT_CONSTEXPR typename sprout::fixed::result_of::append_back<
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sprout::basic_string<T, N, Traits>,
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sprout::basic_string<T, N2 - 1, Traits>
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>::type operator+(
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sprout::basic_string<T, N, Traits> const& lhs,
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T const (& rhs)[N2]
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)
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{
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return sprout::fixed::append_back(lhs, sprout::to_string(rhs));
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template<typename T, std::size_t N, typename Traits, std::size_t M>
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inline SPROUT_CONSTEXPR sprout::basic_string<T, N + (M - 1), Traits>
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operator+(sprout::basic_string<T, N, Traits> const& lhs, T const (& rhs)[M]) {
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return sprout::detail::string_concat(
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lhs, lhs.size(),
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rhs, sprout::char_traits<T>::length(rhs),
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sprout::index_range<0, N + (M - 1)>::make()
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);
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}
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template<typename T, std::size_t N, typename Traits, std::size_t N2>
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inline SPROUT_CONSTEXPR typename sprout::fixed::result_of::append_front<
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sprout::basic_string<T, N, Traits>,
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sprout::basic_string<T, N2 - 1, Traits>
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>::type operator+(
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T const (& lhs)[N2],
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sprout::basic_string<T, N, Traits> const& rhs
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)
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{
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return sprout::fixed::append_front(rhs, sprout::to_string(lhs));
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template<typename T, std::size_t N, typename Traits, std::size_t M>
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inline SPROUT_CONSTEXPR sprout::basic_string<T, (M - 1) + N, Traits>
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operator+(T const (& lhs)[M], sprout::basic_string<T, N, Traits> const& rhs) {
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return sprout::detail::string_concat(
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lhs, sprout::char_traits<T>::length(lhs),
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rhs, rhs.size(),
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sprout::index_range<0, (M - 1) + N>::make()
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);
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}
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template<typename T, std::size_t N, typename Traits, std::size_t N2>
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inline SPROUT_CONSTEXPR typename sprout::fixed::result_of::append_back<
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sprout::basic_string<T, N, Traits>,
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sprout::basic_string<T, N2, Traits>
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>::type operator+(
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sprout::basic_string<T, N, Traits> const& lhs,
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sprout::basic_string<T, N2, Traits> const& rhs
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)
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{
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return sprout::fixed::append_back(lhs, rhs);
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template<typename T, std::size_t N1, std::size_t N2, typename Traits>
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inline SPROUT_CONSTEXPR sprout::basic_string<T, N1 + N2, Traits>
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operator+(sprout::basic_string<T, N1, Traits> const& lhs, sprout::basic_string<T, N2, Traits> const& rhs) {
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return sprout::detail::string_concat(
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lhs, lhs.size(),
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rhs, rhs.size(),
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sprout::index_range<0, N1 + N2>::make()
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);
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}
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} // namespace sprout
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