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🚨 fixed a compiler warning #1224

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This commit is contained in:
Niels Lohmann 2018-09-06 07:25:19 +02:00
parent d713727f22
commit eb30ff0615
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GPG key ID: 7F3CEA63AE251B69
4 changed files with 4 additions and 17 deletions
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6
include/nlohmann/detail/meta/type_traits.hpp
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@ -141,14 +141,12 @@ struct is_compatible_integer_type
template<typename BasicJsonType, typename T>
struct has_from_json
{
private:
// also check the return type of from_json
template<typename U, typename = enable_if_t<std::is_same<void, decltype(uncvref_t<U>::from_json(
std::declval<BasicJsonType>(), std::declval<T&>()))>::value>>
static int detect(U&&);
static void detect(...);
public:
static constexpr bool value = std::is_integral<decltype(
detect(std::declval<typename BasicJsonType::template json_serializer<T, void>>()))>::value;
};
@ -158,7 +156,6 @@ struct has_from_json
template<typename BasicJsonType, typename T>
struct has_non_default_from_json
{
private:
template <
typename U,
typename = enable_if_t<std::is_same<
@ -166,7 +163,6 @@ struct has_non_default_from_json
static int detect(U&&);
static void detect(...);
public:
static constexpr bool value = std::is_integral<decltype(detect(
std::declval<typename BasicJsonType::template json_serializer<T, void>>()))>::value;
};
@ -175,13 +171,11 @@ struct has_non_default_from_json
template<typename BasicJsonType, typename T>
struct has_to_json
{
private:
template<typename U, typename = decltype(uncvref_t<U>::to_json(
std::declval<BasicJsonType&>(), std::declval<T>()))>
static int detect(U&&);
static void detect(...);
public:
static constexpr bool value = std::is_integral<decltype(detect(
std::declval<typename BasicJsonType::template json_serializer<T, void>>()))>::value;
};