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#include <mbgl/style/conversion/constant.hpp>
namespace mbgl {
namespace style {
namespace conversion {
optional<bool> Converter<bool>::operator()(const Convertible& value, Error& error) const {
optional<bool> converted = toBool(value);
if (!converted) {
error = { "value must be a boolean" };
return {};
}
return *converted;
}
optional<float> Converter<float>::operator()(const Convertible& value, Error& error) const {
optional<float> converted = toNumber(value);
if (!converted) {
error = { "value must be a number" };
return {};
}
return *converted;
}
optional<std::string> Converter<std::string>::operator()(const Convertible& value, Error& error) const {
optional<std::string> converted = toString(value);
if (!converted) {
error = { "value must be a string" };
return {};
}
return *converted;
}
optional<Color> Converter<Color>::operator()(const Convertible& value, Error& error) const {
optional<std::string> string = toString(value);
if (!string) {
error = { "value must be a string" };
return {};
}
optional<Color> color = Color::parse(*string);
if (!color) {
error = { "value must be a valid color" };
return {};
}
return *color;
}
optional<std::vector<float>> Converter<std::vector<float>>::operator()(const Convertible& value, Error& error) const {
if (!isArray(value)) {
error = { "value must be an array" };
return {};
}
std::vector<float> result;
result.reserve(arrayLength(value));
for (std::size_t i = 0; i < arrayLength(value); ++i) {
optional<float> number = toNumber(arrayMember(value, i));
if (!number) {
error = { "value must be an array of numbers" };
return {};
}
result.push_back(*number);
}
return result;
}
optional<std::vector<std::string>> Converter<std::vector<std::string>>::operator()(const Convertible& value, Error& error) const {
if (!isArray(value)) {
error = { "value must be an array" };
return {};
}
std::vector<std::string> result;
result.reserve(arrayLength(value));
for (std::size_t i = 0; i < arrayLength(value); ++i) {
optional<std::string> string = toString(arrayMember(value, i));
if (!string) {
error = { "value must be an array of strings" };
return {};
}
result.push_back(*string);
}
return result;
}
} // namespace conversion
} // namespace style
} // namespace mbgl
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