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add is_compatible_basic_json_type trait

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This commit is contained in:
Théo DELRIEU 2016-11-21 13:23:25 +01:00
parent 9b401972a0
commit ee19acaf05
1 changed files with 20 additions and 21 deletions
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41
src/json.hpp
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@ -267,6 +267,19 @@ struct is_compatible_float_type
std::is_floating_point<CompatibleFloat>::value;
};
template <typename T, typename BasicJson>
struct is_compatible_basic_json_type
{
static auto constexpr value = disjunction<
is_compatible_array_type<BasicJson, T>,
is_compatible_object_type<typename BasicJson::object_t, T>,
is_compatible_float_type<typename BasicJson::number_float_t, T>,
is_compatible_integer_type<typename BasicJson::number_integer_t, T>,
is_compatible_unsigned_integer_type<typename BasicJson::number_unsigned_t, T>,
std::is_constructible<typename BasicJson::string_t, T>,
std::is_same<typename BasicJson::boolean_t, T>>::value;
};
template <template <typename, typename> class JSONSerializer, typename Json,
typename T>
struct has_from_json
@ -1528,20 +1541,13 @@ class basic_json
assert_invariant();
}
// constructor chosen when JSONSerializer::to_json exists for type T
// first check avoids being chosen instead of move/copy constructor
template <typename T, enable_if_t<detail::conjunction<detail::negation<std::is_same<uncvref_t<T>, basic_json_t>>,
detail::negation<detail::disjunction<
detail::is_compatible_array_type<basic_json_t, uncvref_t<T>>,
detail::is_compatible_object_type<object_t, uncvref_t<T>>,
detail::is_compatible_float_type<number_float_t, uncvref_t<T>>,
detail::is_compatible_integer_type<number_integer_t, uncvref_t<T>>,
detail::is_compatible_unsigned_integer_type<number_unsigned_t, uncvref_t<T>>,
std::is_constructible<string_t, uncvref_t<T>>,
std::is_base_of<std::istream, uncvref_t<T>>,
std::is_same<boolean_t, uncvref_t<T>>>>,
detail::has_to_json<
JSONSerializer, basic_json, uncvref_t<T>>
>::value, int> = 0>
detail::negation<std::is_base_of<std::istream, uncvref_t<T>>>,
detail::negation<detail::is_compatible_basic_json_type<uncvref_t<T>, basic_json_t>>, detail::has_to_json<
JSONSerializer, basic_json, uncvref_t<T>>>::value, int> = 0>
explicit basic_json(T &&val)
{
JSONSerializer<uncvref_t<T>>::to_json(*this, std::forward<T>(val));
@ -3209,15 +3215,8 @@ detail::negation<detail::disjunction<
}
template <typename T,
enable_if_t<detail::has_from_json<
JSONSerializer, basic_json, uncvref_t<T>>::value
and not (detail::is_compatible_object_type<object_t, uncvref_t<T>>::value or
detail::is_compatible_array_type<basic_json_t, uncvref_t<T>>::value or
detail::is_compatible_float_type<number_float_t, uncvref_t<T>>::value or
detail::is_compatible_integer_type<number_integer_t, uncvref_t<T>>::value or
detail::is_compatible_unsigned_integer_type<number_unsigned_t, uncvref_t<T>>::value or
std::is_constructible<string_t, uncvref_t<T>>::value or
std::is_same<boolean_t, uncvref_t<T>>::value), int> = 0>
enable_if_t<detail::conjunction<detail::negation<detail::is_compatible_basic_json_type<uncvref_t<T>, basic_json_t>>,
detail::has_from_json<JSONSerializer, basic_json_t, uncvref_t<T>>>::value, int> = 0>
auto get() const -> uncvref_t<T>
{
using type = uncvref_t<T>;