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#pragma once
#include "../errors.h"
#include <sqlite3.h>
#include <optional>
#include <variant>
namespace sqlite::utility {
template<typename ...Options>
struct VariantFirstNullable {
using type = void;
};
template<typename T, typename ...Options>
struct VariantFirstNullable<T, Options...> {
using type = typename VariantFirstNullable<Options...>::type;
};
#ifdef MODERN_SQLITE_STD_OPTIONAL_SUPPORT
template<typename T, typename ...Options>
struct VariantFirstNullable<std::optional<T>, Options...> {
using type = std::optional<T>;
};
#endif
template<typename T, typename ...Options>
struct VariantFirstNullable<std::unique_ptr<T>, Options...> {
using type = std::unique_ptr<T>;
};
template<typename ...Options>
struct VariantFirstNullable<std::nullptr_t, Options...> {
using type = std::nullptr_t;
};
template<typename Callback, typename ...Options>
inline void variant_select_null(Callback&&callback) {
if constexpr(std::is_same_v<typename VariantFirstNullable<Options...>::type, void>) {
throw errors::mismatch("NULL is unsupported by this variant.", "", SQLITE_MISMATCH);
} else {
std::forward<Callback>(callback)(typename VariantFirstNullable<Options...>::type());
}
}
template<typename ...Options>
struct VariantFirstIntegerable {
using type = void;
};
template<typename T, typename ...Options>
struct VariantFirstIntegerable<T, Options...> {
using type = typename VariantFirstIntegerable<Options...>::type;
};
#ifdef MODERN_SQLITE_STD_OPTIONAL_SUPPORT
template<typename T, typename ...Options>
struct VariantFirstIntegerable<std::optional<T>, Options...> {
using type = std::conditional_t<std::is_same_v<typename VariantFirstIntegerable<T, Options...>::type, T>, std::optional<T>, typename VariantFirstIntegerable<Options...>::type>;
};
#endif
template<typename T, typename ...Options>
struct VariantFirstIntegerable<std::enable_if_t<std::is_same_v<typename VariantFirstIntegerable<T, Options...>::type, T>>, std::unique_ptr<T>, Options...> {
using type = std::conditional_t<std::is_same_v<typename VariantFirstIntegerable<T, Options...>::type, T>, std::unique_ptr<T>, typename VariantFirstIntegerable<Options...>::type>;
};
template<typename ...Options>
struct VariantFirstIntegerable<int, Options...> {
using type = int;
};
template<typename ...Options>
struct VariantFirstIntegerable<sqlite_int64, Options...> {
using type = sqlite_int64;
};
template<typename Callback, typename ...Options>
inline auto variant_select_integer(Callback&&callback) {
if constexpr(std::is_same_v<typename VariantFirstIntegerable<Options...>::type, void>) {
throw errors::mismatch("Integer is unsupported by this variant.", "", SQLITE_MISMATCH);
} else {
std::forward<Callback>(callback)(typename VariantFirstIntegerable<Options...>::type());
}
}
template<typename ...Options>
struct VariantFirstFloatable {
using type = void;
};
template<typename T, typename ...Options>
struct VariantFirstFloatable<T, Options...> {
using type = typename VariantFirstFloatable<Options...>::type;
};
#ifdef MODERN_SQLITE_STD_OPTIONAL_SUPPORT
template<typename T, typename ...Options>
struct VariantFirstFloatable<std::optional<T>, Options...> {
using type = std::conditional_t<std::is_same_v<typename VariantFirstFloatable<T, Options...>::type, T>, std::optional<T>, typename VariantFirstFloatable<Options...>::type>;
};
#endif
template<typename T, typename ...Options>
struct VariantFirstFloatable<std::unique_ptr<T>, Options...> {
using type = std::conditional_t<std::is_same_v<typename VariantFirstFloatable<T, Options...>::type, T>, std::unique_ptr<T>, typename VariantFirstFloatable<Options...>::type>;
};
template<typename ...Options>
struct VariantFirstFloatable<float, Options...> {
using type = float;
};
template<typename ...Options>
struct VariantFirstFloatable<double, Options...> {
using type = double;
};
template<typename Callback, typename ...Options>
inline auto variant_select_float(Callback&&callback) {
if constexpr(std::is_same_v<typename VariantFirstFloatable<Options...>::type, void>) {
throw errors::mismatch("Real is unsupported by this variant.", "", SQLITE_MISMATCH);
} else {
std::forward<Callback>(callback)(typename VariantFirstFloatable<Options...>::type());
}
}
template<typename ...Options>
struct VariantFirstTextable {
using type = void;
};
template<typename T, typename ...Options>
struct VariantFirstTextable<T, Options...> {
using type = typename VariantFirstTextable<void, Options...>::type;
};
#ifdef MODERN_SQLITE_STD_OPTIONAL_SUPPORT
template<typename T, typename ...Options>
struct VariantFirstTextable<std::optional<T>, Options...> {
using type = std::conditional_t<std::is_same_v<typename VariantFirstTextable<T, Options...>::type, T>, std::optional<T>, typename VariantFirstTextable<Options...>::type>;
};
#endif
template<typename T, typename ...Options>
struct VariantFirstTextable<std::unique_ptr<T>, Options...> {
using type = std::conditional_t<std::is_same_v<typename VariantFirstTextable<T, Options...>::type, T>, std::unique_ptr<T>, typename VariantFirstTextable<Options...>::type>;
};
template<typename ...Options>
struct VariantFirstTextable<std::string, Options...> {
using type = std::string;
};
template<typename ...Options>
struct VariantFirstTextable<std::u16string, Options...> {
using type = std::u16string;
};
template<typename Callback, typename ...Options>
inline void variant_select_text(Callback&&callback) {
if constexpr(std::is_same_v<typename VariantFirstTextable<Options...>::type, void>) {
throw errors::mismatch("Text is unsupported by this variant.", "", SQLITE_MISMATCH);
} else {
std::forward<Callback>(callback)(typename VariantFirstTextable<Options...>::type());
}
}
template<typename ...Options>
struct VariantFirstBlobable {
using type = void;
};
template<typename T, typename ...Options>
struct VariantFirstBlobable<T, Options...> {
using type = typename VariantFirstBlobable<Options...>::type;
};
#ifdef MODERN_SQLITE_STD_OPTIONAL_SUPPORT
template<typename T, typename ...Options>
struct VariantFirstBlobable<std::optional<T>, Options...> {
using type = std::conditional_t<std::is_same_v<typename VariantFirstBlobable<T, Options...>::type, T>, std::optional<T>, typename VariantFirstBlobable<Options...>::type>;
};
#endif
template<typename T, typename ...Options>
struct VariantFirstBlobable<std::unique_ptr<T>, Options...> {
using type = std::conditional_t<std::is_same_v<typename VariantFirstBlobable<T, Options...>::type, T>, std::unique_ptr<T>, typename VariantFirstBlobable<Options...>::type>;
};
template<typename T, typename A, typename ...Options>
struct VariantFirstBlobable<std::enable_if_t<std::is_pod_v<T>>, std::vector<T, A>, Options...> {
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