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feat: enable to convert generic string

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ToruNiina 2024-07-16 00:17:18 +09:00
parent f86d04f64d
commit c0a8b60a5d
2 changed files with 46 additions and 4 deletions
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26
include/toml11/get.hpp
View File

@ -109,16 +109,32 @@ get(const basic_value<TC>& v)
return static_cast<T>(v.as_floating());
}
// ============================================================================
// std::string with different char/trait/allocator
template<typename T, typename TC>
cxx::enable_if_t<cxx::conjunction<
detail::is_not_toml_type<T, basic_value<TC>>,
detail::is_1byte_std_basic_string<T>
>::value, T>
get(const basic_value<TC>& v)
{
using value_type = typename cxx::remove_cvref_t<T>::value_type;
using traits_type = typename cxx::remove_cvref_t<T>::traits_type;
using allocator_type = typename cxx::remove_cvref_t<T>::allocator_type;
return detail::to_string_of<value_type, traits_type, allocator_type>(v.as_string());
}
// ============================================================================
// std::string_view
#if defined(TOML11_HAS_STRING_VIEW)
template<typename T, typename TC>
cxx::enable_if_t<std::is_same<T, std::string_view>::value, std::string_view>
cxx::enable_if_t<detail::is_string_view_of<T, typename basic_value<TC>::string_type>::value, T>
get(const basic_value<TC>& v)
{
return std::string_view(v.as_string());
return T(v.as_string());
}
#endif // string_view
@ -176,6 +192,9 @@ cxx::enable_if_t<cxx::conjunction<
detail::has_push_back_method<T>, // .push_back() works
detail::is_not_toml_type<T, basic_value<TC>>, // but not toml::array
cxx::negation<detail::is_std_basic_string<T>>, // but not std::basic_string<CharT>
#if defined(TOML11_HAS_STRING_VIEW)
cxx::negation<detail::is_std_basic_string_view<T>>, // but not std::basic_string_view<CharT>
#endif
cxx::negation<detail::has_from_toml_method<T, TC>>, // no T.from_toml()
cxx::negation<detail::has_specialized_from<T>>, // no toml::from<T>
cxx::negation<std::is_constructible<T, const basic_value<TC>&>>
@ -247,6 +266,9 @@ cxx::enable_if_t<cxx::conjunction<
detail::has_push_back_method<T>, // .push_back() works
detail::is_not_toml_type<T, basic_value<TC>>, // but not toml::array
cxx::negation<detail::is_std_basic_string<T>>, // but not std::basic_string<CharT>
#if defined(TOML11_HAS_STRING_VIEW)
cxx::negation<detail::is_std_basic_string_view<T>>, // but not std::basic_string_view<CharT>
#endif
cxx::negation<detail::has_from_toml_method<T, TC>>, // no T.from_toml()
cxx::negation<detail::has_specialized_from<T>>, // no toml::from<T>
cxx::negation<std::is_constructible<T, const basic_value<TC>&>>

24
include/toml11/traits.hpp
View File

@ -163,11 +163,31 @@ template<typename T>
using is_std_forward_list = is_std_forward_list_impl<cxx::remove_cvref_t<T>>;
template<typename T> struct is_std_basic_string_impl : std::false_type{};
template<typename T>
struct is_std_basic_string_impl<std::basic_string<T>> : std::true_type{};
template<typename C, typename T, typename A>
struct is_std_basic_string_impl<std::basic_string<C, T, A>> : std::true_type{};
template<typename T>
using is_std_basic_string = is_std_basic_string_impl<cxx::remove_cvref_t<T>>;
template<typename T> struct is_1byte_std_basic_string_impl : std::false_type{};
template<typename C, typename T, typename A>
struct is_1byte_std_basic_string_impl<std::basic_string<C, T, A>>
: std::integral_constant<bool, sizeof(C) == sizeof(char)> {};
template<typename T>
using is_1byte_std_basic_string = is_std_basic_string_impl<cxx::remove_cvref_t<T>>;
#if defined(TOML11_HAS_STRING_VIEW)
template<typename T> struct is_std_basic_string_view_impl : std::false_type{};
template<typename C, typename T>
struct is_std_basic_string_view_impl<std::basic_string_view<C, T>> : std::true_type{};
template<typename T>
using is_std_basic_string_view = is_std_basic_string_view_impl<cxx::remove_cvref_t<T>>;
template<typename V, typename S>
struct is_string_view_of : std::false_type {};
template<typename C, typename T>
struct is_string_view_of<std::basic_string_view<C, T>, std::basic_string<C, T>> : std::true_type {};
#endif
template<typename T> struct is_chrono_duration_impl: std::false_type{};
template<typename Rep, typename Period>
struct is_chrono_duration_impl<std::chrono::duration<Rep, Period>>: std::true_type{};