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#pragma once
#include <mbgl/style/conversion.hpp>
#include <mbgl/util/color.hpp>
#include <mbgl/util/enum.hpp>
#include <mbgl/util/string.hpp>
#include <array>
#include <string>
#include <vector>
namespace mbgl {
namespace style {
namespace conversion {
template <>
struct Converter<bool> {
optional<bool> operator()(const Convertible& value, Error& error) const;
};
template <>
struct Converter<float> {
optional<float> operator()(const Convertible& value, Error& error) const;
};
template <>
struct Converter<std::string> {
optional<std::string> operator()(const Convertible& value, Error& error) const;
};
template <class T>
struct Converter<T, typename std::enable_if_t<std::is_enum<T>::value>> {
optional<T> operator()(const Convertible& value, Error& error) const {
optional<std::string> string = toString(value);
if (!string) {
error = { "value must be a string" };
return {};
}
const auto result = Enum<T>::toEnum(*string);
if (!result) {
error = { "value must be a valid enumeration value" };
return {};
}
return *result;
}
};
template <>
struct Converter<Color> {
optional<Color> operator()(const Convertible& value, Error& error) const;
};
template <size_t N>
struct Converter<std::array<float, N>> {
optional<std::array<float, N>> operator()(const Convertible& value, Error& error) const {
if (!isArray(value) || arrayLength(value) != N) {
error = { "value must be an array of " + util::toString(N) + " numbers" };
return {};
}
std::array<float, N> result;
for (size_t i = 0; i < N; i++) {
optional<float> n = toNumber(arrayMember(value, i));
if (!n) {
error = { "value must be an array of " + util::toString(N) + " numbers" };
return {};
}
result[i] = *n;
}
return result;
}
};
template <>
struct Converter<std::vector<float>> {
optional<std::vector<float>> operator()(const Convertible& value, Error& error) const;
};
template <>
struct Converter<std::vector<std::string>> {
optional<std::vector<std::string>> operator()(const Convertible& value, Error& error) const;
};
} // namespace conversion
} // namespace style
} // namespace mbgl
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