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De-macro helpers.

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This commit is contained in:
Daniel Kirchner 2022-11-01 12:49:22 +01:00
parent c23093e0f0
commit 74be278242
1 changed files with 26 additions and 29 deletions
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55
libsolutil/JSON.h
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@ -73,36 +73,33 @@ namespace detail
template<typename T>
struct helper;
#define DEFINE_JSON_CONVERSION_HELPERS(TYPE, CHECK_TYPE_MEMBER, CONVERT_TYPE_MEMBER) \
template<> \
struct helper<TYPE> \
{ \
static bool isOfType(Json::Value const& _input) \
{ \
return _input.CHECK_TYPE_MEMBER(); \
} \
static TYPE get(Json::Value const& _input) \
{ \
return _input.CONVERT_TYPE_MEMBER(); \
} \
static TYPE getOrDefault(Json::Value const& _input, TYPE _default = {}) \
{ \
TYPE result = _default; \
if (helper::isOfType(_input)) \
result = _input.CONVERT_TYPE_MEMBER(); \
return result; \
} \
};
template<typename T, bool(Json::Value::*checkMember)() const, T(Json::Value::*convertMember)() const>
struct helper_impl
{
static bool isOfType(Json::Value const& _input)
{
return (_input.*checkMember)();
}
static T get(Json::Value const& _input)
{
return (_input.*convertMember)();
}
static T getOrDefault(Json::Value const& _input, T _default = {})
{
T result = _default;
if (isOfType(_input))
result = (_input.*convertMember)();
return result;
}
};
DEFINE_JSON_CONVERSION_HELPERS(float, isDouble, asFloat)
DEFINE_JSON_CONVERSION_HELPERS(double, isDouble, asDouble)
DEFINE_JSON_CONVERSION_HELPERS(std::string, isString, asString)
DEFINE_JSON_CONVERSION_HELPERS(Json::Int, isInt, asInt)
DEFINE_JSON_CONVERSION_HELPERS(Json::Int64, isInt64, asInt64)
DEFINE_JSON_CONVERSION_HELPERS(Json::UInt, isUInt, asUInt)
DEFINE_JSON_CONVERSION_HELPERS(Json::UInt64, isUInt64, asUInt64)
#undef DEFINE_JSON_CONVERSION_HELPERS
template<> struct helper<float>: helper_impl<float, &Json::Value::isDouble, &Json::Value::asFloat> {};
template<> struct helper<double>: helper_impl<double, &Json::Value::isDouble, &Json::Value::asDouble> {};
template<> struct helper<std::string>: helper_impl<std::string, &Json::Value::isString, &Json::Value::asString> {};
template<> struct helper<Json::Int>: helper_impl<Json::Int, &Json::Value::isInt, &Json::Value::asInt> {};
template<> struct helper<Json::Int64>: helper_impl<Json::Int64, &Json::Value::isInt64, &Json::Value::asInt64> {};
template<> struct helper<Json::UInt>: helper_impl<Json::UInt, &Json::Value::isUInt, &Json::Value::asUInt> {};
template<> struct helper<Json::UInt64>: helper_impl<Json::UInt64, &Json::Value::isUInt64, &Json::Value::asUInt64> {};
} // namespace detail