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add string_ref user-defined literals

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This commit is contained in:
bolero-MURAKAMI 2016-03-25 10:48:59 +09:00
parent 2fce5bd7f9
commit 5bdb045730
7 changed files with 398 additions and 199 deletions
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52
sprout/string/shift_concat.hpp
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@ -77,6 +77,23 @@ namespace sprout {
)...
);
}
template<typename T, std::size_t N, typename Traits, sprout::index_t... Indexes>
inline SPROUT_INITIALIZER_LIST_CONSTEXPR sprout::basic_string<T, N, Traits>
string_rshift(
sprout::basic_string<T, N, Traits> const& lhs, std::size_t lsize,
std::initializer_list<T> rhs, std::size_t rsize,
sprout::index_tuple<Indexes...>
)
{
typedef sprout::detail::string_construct_access<T, N, Traits> access_type;
return access_type::raw_construct(
sprout::detail::checked_length<N>(lsize + rsize),
(Indexes < lsize ? lhs[Indexes]
: Indexes < lsize + rsize ? rhs.begin()[Indexes - lsize]
: T()
)...
);
}
} // namespace detail
//
// operator<<
@ -108,6 +125,15 @@ namespace sprout {
sprout::make_index_tuple<N1>::make()
);
}
template<typename T, std::size_t N, typename Traits>
inline SPROUT_INITIALIZER_LIST_CONSTEXPR sprout::basic_string<T, N, Traits>
operator<<(sprout::basic_string<T, N, Traits> const& lhs, std::initializer_list<T> rhs) {
return sprout::detail::string_rshift(
lhs, lhs.size(),
rhs, rhs.size(),
sprout::make_index_tuple<N>::make()
);
}
namespace detail {
template<typename T, std::size_t N, typename Traits, sprout::index_t... Indexes>
@ -161,6 +187,23 @@ namespace sprout {
)...
);
}
template<typename T, std::size_t N, typename Traits, sprout::index_t... Indexes>
inline SPROUT_INITIALIZER_LIST_CONSTEXPR sprout::basic_string<T, N, Traits>
string_lshift(
sprout::basic_string<T, N, Traits> const& lhs, std::size_t lsize,
std::initializer_list<T> rhs, std::size_t rsize,
sprout::index_tuple<Indexes...>
)
{
typedef sprout::detail::string_construct_access<T, N, Traits> access_type;
return access_type::raw_construct(
sprout::detail::checked_length<N>(rsize + lsize),
(Indexes < rsize ? rhs.begin()[Indexes]
: Indexes < rsize + lsize ? lhs[Indexes - rsize]
: T()
)...
);
}
} // namespace detail
//
// operator>>
@ -192,6 +235,15 @@ namespace sprout {
sprout::make_index_tuple<N1>::make()
);
}
template<typename T, std::size_t N, typename Traits>
inline SPROUT_INITIALIZER_LIST_CONSTEXPR sprout::basic_string<T, N, Traits>
operator>>(sprout::basic_string<T, N, Traits> const& lhs, std::initializer_list<T> rhs) {
return sprout::detail::string_lshift(
lhs, lhs.size(),
rhs, rhs.size(),
sprout::make_index_tuple<N>::make()
);
}
} // namespace sprout
#endif // #ifndef SPROUT_STRING_SHIFT_CONCAT_HPP