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[Destructive changes] add sprout::string constructor (already not an aggregate)

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This commit is contained in:
bolero-MURAKAMI 2013-08-09 19:04:37 +09:00
parent cb1077d247
commit baf8995e81
17 changed files with 466 additions and 301 deletions
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11
sprout/string/shrink.hpp
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@ -27,14 +27,15 @@ namespace sprout {
private:
typedef sprout::value_holder<string_type const&> holder_type;
private:
template<std::size_t M, sprout::index_t... Indexes>
template<sprout::index_t... Indexes>
static SPROUT_CONSTEXPR sprout::basic_string<T, sizeof...(Indexes), Traits>
implicit_conversion_impl(
T const(& elems)[M], std::size_t len,
string_type const& str, std::size_t len,
sprout::index_tuple<Indexes...>
)
{
return sprout::basic_string<T, sizeof...(Indexes), Traits>{{(Indexes < M - 1 ? elems[Indexes] : T())...}, len};
typedef sprout::detail::string_construct_access<T, sizeof...(Indexes), Traits> access_type;
return access_type::raw_construct(len, (Indexes < N ? str[Indexes] : T())...);
}
private:
holder_type holder_;
@ -50,8 +51,8 @@ namespace sprout {
template<std::size_t N2>
SPROUT_CONSTEXPR operator sprout::basic_string<T, N2, Traits>() const {
return implicit_conversion_impl(
holder_.get().elems,
NS_SSCRISK_CEL_OR_SPROUT::min(N2, holder_.get().len),
holder_.get(),
NS_SSCRISK_CEL_OR_SPROUT::min(N2, holder_.get().size()),
sprout::make_index_tuple<(N < N2 ? N : N2)>::make()
);
}