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make has_mapped_type struct friendly #324

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merged 1 commit into from
Oct 12, 2016
Merged

make has_mapped_type struct friendly #324

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9 changes: 6 additions & 3 deletions src/json.hpp
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Original file line number Diff line number Diff line change
Expand Up @@ -112,10 +112,13 @@ template<typename T>
struct has_mapped_type
{
private:
template<typename C> static char test(typename C::mapped_type*);
template<typename C> static char (&test(...))[2];
template <typename U, typename = typename U::mapped_type>
static int detect(U&&);

static void detect(...);
public:
static constexpr bool value = sizeof(test<T>(0)) == 1;
static constexpr bool value =
std::is_integral<decltype(detect(std::declval<T>()))>::value;
};

/*!
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9 changes: 6 additions & 3 deletions src/json.hpp.re2c
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Original file line number Diff line number Diff line change
Expand Up @@ -112,10 +112,13 @@ template<typename T>
struct has_mapped_type
{
private:
template<typename C> static char test(typename C::mapped_type*);
template<typename C> static char (&test(...))[2];
template <typename U, typename = typename U::mapped_type>
static int detect(U&&);

static void detect(...);
public:
static constexpr bool value = sizeof(test<T>(0)) == 1;
static constexpr bool value =
std::is_integral<decltype(detect(std::declval<T>()))>::value;
};

/*!
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