Result<Tileset> operator()(const V& value) const {
Tileset result;
auto tiles = objectMember(value, "tiles");
if (!tiles) {
return Error { "source must have tiles" };
}
if (!isArray(*tiles)) {
return Error { "source tiles must be an array" };
}
for (std::size_t i = 0; i < arrayLength(*tiles); i++) {
optional<std::string> urlTemplate = toString(arrayMember(*tiles, i));
if (!urlTemplate) {
return Error { "source tiles member must be a string" };
}
result.tiles.push_back(std::move(*urlTemplate));
}
auto schemeValue = objectMember(value, "scheme");
if (schemeValue) {
optional<std::string> scheme = toString(*schemeValue);
if (scheme && *scheme == "tms") {
result.scheme = Tileset::Scheme::TMS;
}
}
auto minzoomValue = objectMember(value, "minzoom");
if (minzoomValue) {
optional<float> minzoom = toNumber(*minzoomValue);
if (!minzoom || *minzoom < 0 || *minzoom > std::numeric_limits<uint8_t>::max()) {
return Error { "invalid minzoom" };
}
result.zoomRange.min = *minzoom;
}
auto maxzoomValue = objectMember(value, "maxzoom");
if (maxzoomValue) {
optional<float> maxzoom = toNumber(*maxzoomValue);
if (!maxzoom || *maxzoom < 0 || *maxzoom > std::numeric_limits<uint8_t>::max()) {
return Error { "invalid maxzoom" };
}
result.zoomRange.max = *maxzoom;
}
auto attributionValue = objectMember(value, "attribution");
if (attributionValue) {
optional<std::string> attribution = toString(*attributionValue);
if (!attribution) {
return Error { "source attribution must be a string" };
}
result.attribution = std::move(*attribution);
}
return result;
}
Result<Function<T>> operator()(const V& value) const {
if (!isObject(value)) {
return Error { "function must be an object" };
}
auto stopsValue = objectMember(value, "stops");
if (!stopsValue) {
return Error { "function value must specify stops" };
}
if (!isArray(*stopsValue)) {
return Error { "function stops must be an array" };
}
if (arrayLength(*stopsValue) == 0) {
return Error { "function must have at least one stop" };
}
std::vector<std::pair<float, T>> stops;
for (std::size_t i = 0; i < arrayLength(*stopsValue); ++i) {
const auto& stopValue = arrayMember(*stopsValue, i);
if (!isArray(stopValue)) {
return Error { "function stop must be an array" };
}
if (arrayLength(stopValue) != 2) {
return Error { "function stop must have two elements" };
}
optional<float> z = toNumber(arrayMember(stopValue, 0));
if (!z) {
return Error { "function stop zoom level must be a number" };
}
Result<T> v = convert<T>(arrayMember(stopValue, 1));
if (!v) {
return v.error();
}
stops.emplace_back(*z, *v);
}
auto baseValue = objectMember(value, "base");
if (!baseValue) {
return Function<T>(stops, 1.0f);
}
optional<float> base = toNumber(*baseValue);
if (!base) {
return Error { "function base must be a number"};
}
return Function<T>(stops, *base);
}
optional<variant<Ts...>> operator()(const V& value, Error& error) const {
std::string type = util::Interpolatable<T>::value ? "exponential" : "interval";
auto typeValue = objectMember(value, "type");
if (typeValue && toString(*typeValue)) {
type = *toString(*typeValue);
}
bool matched = false;
optional<variant<Ts...>> result;
// Workaround for https://gcc.gnu.org/bugzilla/show_bug.cgi?id=47226
auto tryConvert = [&] (auto* tp) {
using Stops = std::decay_t<decltype(*tp)>;
if (type == Converter<Stops>::type) {
matched = true;
optional<Stops> stops = convert<Stops>(value, error);
if (stops) {
result = variant<Ts...>(*stops);
}
}
};
util::ignore({
(tryConvert((Ts*)nullptr), 0)...
});
if (!matched) {
error = { "unsupported function type" };
return {};
}
return result;
}
optional<std::unique_ptr<Source>> Converter<std::unique_ptr<Source>>::operator()(const Convertible& value, Error& error, const std::string& id) const {
if (!isObject(value)) {
error = { "source must be an object" };
return {};
}
auto typeValue = objectMember(value, "type");
if (!typeValue) {
error = { "source must have a type" };
return {};
}
optional<std::string> type = toString(*typeValue);
if (!type) {
error = { "source type must be a string" };
return {};
}
if (*type == "raster") {
return convertRasterSource(id, value, error);
} else if (*type == "vector") {
return convertVectorSource(id, value, error);
} else if (*type == "geojson") {
return convertGeoJSONSource(id, value, error);
} else if (*type == "image") {
return convertImageSource(id, value, error);
} else {
error = { "invalid source type" };
return {};
}
}
static optional<std::unique_ptr<Source>> convertGeoJSONSource(const std::string& id,
const Convertible& value,
Error& error) {
auto dataValue = objectMember(value, "data");
if (!dataValue) {
error = { "GeoJSON source must have a data value" };
return {};
}
optional<GeoJSONOptions> options = convert<GeoJSONOptions>(value, error);
if (!options) {
return {};
}
auto result = std::make_unique<GeoJSONSource>(id, *options);
if (isObject(*dataValue)) {
optional<GeoJSON> geoJSON = convert<GeoJSON>(*dataValue, error);
if (!geoJSON) {
return {};
}
result->setGeoJSON(std::move(*geoJSON));
} else if (toString(*dataValue)) {
result->setURL(*toString(*dataValue));
} else {
error = { "GeoJSON data must be a URL or an object" };
return {};
}
return { std::move(result) };
}
optional<Error> setPaintProperties(Layer& layer, const V& value) {
auto paintValue = objectMember(value, "paint");
if (!paintValue) {
return {};
}
return eachMember(*paintValue, [&] (const std::string& k, const V& v) {
return setPaintProperty(layer, k, v);
});
}
optional<Error> setPaintProperties(Layer& layer, const Convertible& value) {
auto paintValue = objectMember(value, "paint");
if (!paintValue) {
return nullopt;
}
if (!isObject(*paintValue)) {
return { { "paint must be an object" } };
}
return eachMember(*paintValue, [&] (const std::string& k, const Convertible& v) {
return layer.setPaintProperty(k, v);
});
}
static optional<std::unique_ptr<Source>> convertImageSource(const std::string& id,
const Convertible& value,
Error& error) {
auto urlValue = objectMember(value, "url");
if (!urlValue) {
error = { "Image source must have a url value" };
return {};
}
auto urlString = toString(*urlValue);
if (!urlString) {
error = { "Image url must be a URL string" };
return {};
}
auto coordinatesValue = objectMember(value, "coordinates");
if (!coordinatesValue) {
error = { "Image source must have a coordinates values" };
return {};
}
if (!isArray(*coordinatesValue) || arrayLength(*coordinatesValue) != 4) {
error = { "Image coordinates must be an array of four longitude latitude pairs" };
return {};
}
std::array<LatLng, 4> coordinates;
for (std::size_t i=0; i < 4; i++) {
auto latLng = conversion::convert<LatLng>(arrayMember(*coordinatesValue,i), error);
if (!latLng) {
return {};
}
coordinates[i] = *latLng;
}
auto result = std::make_unique<ImageSource>(id, coordinates);
result->setURL(*urlString);
return { std::move(result) };
}
optional<std::unique_ptr<Layer>> convertVectorLayer(const std::string& id, const V& value, Error& error) const {
auto sourceValue = objectMember(value, "source");
if (!sourceValue) {
error = { "layer must have a source" };
return {};
}
optional<std::string> source = toString(*sourceValue);
if (!source) {
error = { "layer source must be a string" };
return {};
}
std::unique_ptr<LayerType> layer = std::make_unique<LayerType>(id, *source);
auto sourceLayerValue = objectMember(value, "source-layer");
if (sourceLayerValue) {
optional<std::string> sourceLayer = toString(*sourceLayerValue);
if (!sourceLayer) {
error = { "layer source-layer must be a string" };
return {};
}
layer->setSourceLayer(*sourceLayer);
}
auto filterValue = objectMember(value, "filter");
if (filterValue) {
optional<Filter> filter = convert<Filter>(*filterValue, error);
if (!filter) {
return {};
}
layer->setFilter(*filter);
}
return { std::move(layer) };
}
optional<std::unique_ptr<Layer>> convertRasterLayer(const std::string& id, const V& value, Error& error) const {
auto sourceValue = objectMember(value, "source");
if (!sourceValue) {
error = { "layer must have a source" };
return {};
}
optional<std::string> source = toString(*sourceValue);
if (!source) {
error = { "layer source must be a string" };
return {};
}
return { std::make_unique<RasterLayer>(id, *source) };
}
optional<std::map<D, R>> convertStops(const V& value, Error& error) {
auto stopsValue = objectMember(value, "stops");
if (!stopsValue) {
error = { "function value must specify stops" };
return {};
}
if (!isArray(*stopsValue)) {
error = { "function stops must be an array" };
return {};
}
if (arrayLength(*stopsValue) == 0) {
error = { "function must have at least one stop" };
return {};
}
std::map<D, R> stops;
for (std::size_t i = 0; i < arrayLength(*stopsValue); ++i) {
const auto& stopValue = arrayMember(*stopsValue, i);
if (!isArray(stopValue)) {
error = { "function stop must be an array" };
return {};
}
if (arrayLength(stopValue) != 2) {
error = { "function stop must have two elements" };
return {};
}
optional<D> d = convert<D>(arrayMember(stopValue, 0), error);
if (!d) {
return {};
}
optional<R> r = convert<R>(arrayMember(stopValue, 1), error);
if (!r) {
return {};
}
stops.emplace(*d, *r);
}
return stops;
}
// A tile source can either specify a URL to TileJSON, or inline TileJSON.
static optional<variant<std::string, Tileset>> convertURLOrTileset(const Convertible& value, Error& error) {
auto urlVal = objectMember(value, "url");
if (!urlVal) {
optional<Tileset> tileset = convert<Tileset>(value, error);
if (!tileset) {
return {};
}
return { *tileset };
}
optional<std::string> url = toString(*urlVal);
if (!url) {
error = { "source url must be a string" };
return {};
}
return { *url };
}
optional<ExponentialStops<T>> operator()(const V& value, Error& error) const {
auto stops = convertStops<float, T>(value, error);
if (!stops) {
return {};
}
auto baseValue = objectMember(value, "base");
if (!baseValue) {
return ExponentialStops<T>(*stops);
}
optional<float> base = toNumber(*baseValue);
if (!base) {
error = { "function base must be a number"};
return {};
}
return ExponentialStops<T>(*stops, *base);
}
static optional<std::unique_ptr<Source>> convertRasterSource(const std::string& id,
const Convertible& value,
Error& error) {
optional<variant<std::string, Tileset>> urlOrTileset = convertURLOrTileset(value, error);
if (!urlOrTileset) {
return {};
}
uint16_t tileSize = util::tileSize;
auto tileSizeValue = objectMember(value, "tileSize");
if (tileSizeValue) {
optional<float> size = toNumber(*tileSizeValue);
if (!size || *size < 0 || *size > std::numeric_limits<uint16_t>::max()) {
error = { "invalid tileSize" };
return {};
}
tileSize = *size;
}
return { std::make_unique<RasterSource>(id, std::move(*urlOrTileset), tileSize) };
}
optional<optional<T>> convertDefaultValue(const V& value, Error& error) {
auto defaultValueValue = objectMember(value, "default");
if (!defaultValueValue) {
return optional<T>();
}
auto defaultValue = convert<T>(*defaultValueValue, error);
if (!defaultValue) {
error = { R"(wrong type for "default": )" + error.message };
return {};
}
return { *defaultValue };
}
template <class T>
struct Converter<SourceFunction<T>> {
template <class V>
optional<SourceFunction<T>> operator()(const V& value, Error& error) const {
if (!isObject(value)) {
error = { "function must be an object" };
return {};
}
optional<PropertyExpression<T>> convertFunctionToExpression(const Convertible& value, Error& error, bool convertTokens) {
auto expression = convertFunctionToExpression(expression::valueTypeToExpressionType<T>(), value, error, convertTokens);
if (!expression) {
return nullopt;
}
optional<T> defaultValue{};
auto defaultValueValue = objectMember(value, "default");
if (defaultValueValue) {
defaultValue = convert<T>(*defaultValueValue, error);
if (!defaultValue) {
error.message = R"(wrong type for "default": )" + error.message;
return nullopt;
}
}
return PropertyExpression<T>(std::move(*expression), defaultValue);
}
template optional<PropertyExpression<AlignmentType>>
convertFunctionToExpression<AlignmentType>(const Convertible&, Error&, bool);
template optional<PropertyExpression<bool>>
convertFunctionToExpression<bool>(const Convertible&, Error&, bool);
template optional<PropertyExpression<CirclePitchScaleType>>
convertFunctionToExpression<CirclePitchScaleType>(const Convertible&, Error&, bool);
template optional<PropertyExpression<float>>
convertFunctionToExpression<float>(const Convertible&, Error&, bool);
template optional<PropertyExpression<HillshadeIlluminationAnchorType>>
convertFunctionToExpression<HillshadeIlluminationAnchorType>(const Convertible&, Error&, bool);
template optional<PropertyExpression<IconTextFitType>>
convertFunctionToExpression<IconTextFitType>(const Convertible&, Error&, bool);
template optional<PropertyExpression<LightAnchorType>>
convertFunctionToExpression<LightAnchorType>(const Convertible&, Error&, bool);
template optional<PropertyExpression<LineCapType>>
convertFunctionToExpression<LineCapType>(const Convertible&, Error&, bool);
template optional<PropertyExpression<LineJoinType>>
convertFunctionToExpression<LineJoinType>(const Convertible&, Error&, bool);
template optional<PropertyExpression<Color>>
convertFunctionToExpression<Color>(const Convertible&, Error&, bool);
template optional<PropertyExpression<Position>>
convertFunctionToExpression<Position>(const Convertible&, Error&, bool);
template optional<PropertyExpression<RasterResamplingType>>
convertFunctionToExpression<RasterResamplingType>(const Convertible&, Error&, bool);
template optional<PropertyExpression<std::array<float, 2>>>
convertFunctionToExpression<std::array<float, 2>>(const Convertible&, Error&, bool);
template optional<PropertyExpression<std::array<float, 4>>>
convertFunctionToExpression<std::array<float, 4>>(const Convertible&, Error&, bool);
template optional<PropertyExpression<std::string>>
convertFunctionToExpression<std::string>(const Convertible&, Error&, bool);
template optional<PropertyExpression<std::vector<float>>>
convertFunctionToExpression<std::vector<float>>(const Convertible&, Error&, bool);
template optional<PropertyExpression<std::vector<std::string>>>
convertFunctionToExpression<std::vector<std::string>>(const Convertible&, Error&, bool);
template optional<PropertyExpression<SymbolAnchorType>>
convertFunctionToExpression<SymbolAnchorType>(const Convertible&, Error&, bool);
template optional<PropertyExpression<SymbolPlacementType>>
convertFunctionToExpression<SymbolPlacementType>(const Convertible&, Error&, bool);
template optional<PropertyExpression<SymbolZOrderType>>
convertFunctionToExpression<SymbolZOrderType>(const Convertible&, Error&, bool);
template optional<PropertyExpression<TextJustifyType>>
convertFunctionToExpression<TextJustifyType>(const Convertible&, Error&, bool);
template optional<PropertyExpression<TextTransformType>>
convertFunctionToExpression<TextTransformType>(const Convertible&, Error&, bool);
template optional<PropertyExpression<TranslateAnchorType>>
convertFunctionToExpression<TranslateAnchorType>(const Convertible&, Error&, bool);
template optional<PropertyExpression<Formatted>>
convertFunctionToExpression<Formatted>(const Convertible&, Error&, bool);
// Ad-hoc Converters for double and int64_t. We should replace float with double wholesale,
// and promote the int64_t Converter to general use (and it should check that the input is
// an integer).
template <>
struct Converter<double> {
optional<double> operator()(const Convertible& value, Error& error) const {
auto converted = convert<float>(value, error);
if (!converted) {
return nullopt;
}
return *converted;
}
};
template <>
struct Converter<int64_t> {
optional<int64_t> operator()(const Convertible& value, Error& error) const {
auto converted = convert<float>(value, error);
if (!converted) {
return nullopt;
}
return *converted;
}
};
enum class FunctionType {
Interval,
Exponential,
Categorical,
Identity,
Invalid
};
static bool interpolatable(type::Type type) {
return type.match(
[&] (const type::NumberType&) {
return true;
},
[&] (const type::ColorType&) {
return true;
},
[&] (const type::Array& array) {
return array.N && array.itemType == type::Number;
},
[&] (const auto&) {
return false;
}
);
}
static optional<std::unique_ptr<Expression>> convertLiteral(type::Type type, const Convertible& value, Error& error, bool convertTokens = false) {
return type.match(
[&] (const type::NumberType&) -> optional<std::unique_ptr<Expression>> {
auto result = convert<float>(value, error);
if (!result) {
return nullopt;
}
return literal(double(*result));
},
[&] (const type::BooleanType&) -> optional<std::unique_ptr<Expression>> {
auto result = convert<bool>(value, error);
if (!result) {
return nullopt;
}
return literal(*result);
},
[&] (const type::StringType&) -> optional<std::unique_ptr<Expression>> {
auto result = convert<std::string>(value, error);
if (!result) {
return nullopt;
}
return convertTokens ? convertTokenStringToExpression(*result) : literal(*result);
},
[&] (const type::ColorType&) -> optional<std::unique_ptr<Expression>> {
auto result = convert<Color>(value, error);
if (!result) {
return nullopt;
}
return literal(*result);
},
[&] (const type::Array& array) -> optional<std::unique_ptr<Expression>> {
if (!isArray(value)) {
error.message = "value must be an array";
return nullopt;
}
if (array.N && arrayLength(value) != *array.N) {
error.message = "value must be an array of length " + util::toString(*array.N);
return nullopt;
}
return array.itemType.match(
[&] (const type::NumberType&) -> optional<std::unique_ptr<Expression>> {
std::vector<expression::Value> 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.message = "value must be an array of numbers";
return nullopt;
}
result.push_back(double(*number));
}
return literal(result);
},
[&] (const type::StringType&) -> optional<std::unique_ptr<Expression>> {
std::vector<expression::Value> 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.message = "value must be an array of strings";
return nullopt;
}
result.push_back(*string);
}
return literal(result);
},
[&] (const auto&) -> optional<std::unique_ptr<Expression>> {
assert(false); // No properties use this type.
return nullopt;
}
);
},
optional<std::unique_ptr<Layer>> Converter<std::unique_ptr<Layer>>::operator()(const Convertible& value, Error& error) const {
if (!isObject(value)) {
error.message = "layer must be an object";
return nullopt;
}
auto idValue = objectMember(value, "id");
if (!idValue) {
error.message = "layer must have an id";
return nullopt;
}
optional<std::string> id = toString(*idValue);
if (!id) {
error.message = "layer id must be a string";
return nullopt;
}
auto typeValue = objectMember(value, "type");
if (!typeValue) {
error.message = "layer must have a type";
return nullopt;
}
optional<std::string> type = toString(*typeValue);
if (!type) {
error.message = "layer type must be a string";
return nullopt;
}
std::unique_ptr<Layer> layer = LayerManager::get()->createLayer(*type, *id, value, error);
if (!layer) {
return nullopt;
}
auto minzoomValue = objectMember(value, "minzoom");
if (minzoomValue) {
optional<float> minzoom = toNumber(*minzoomValue);
if (!minzoom) {
error.message = "minzoom must be numeric";
return nullopt;
}
layer->setMinZoom(*minzoom);
}
auto maxzoomValue = objectMember(value, "maxzoom");
if (maxzoomValue) {
optional<float> maxzoom = toNumber(*maxzoomValue);
if (!maxzoom) {
error.message = "maxzoom must be numeric";
return nullopt;
}
layer->setMaxZoom(*maxzoom);
}
auto layoutValue = objectMember(value, "layout");
if (layoutValue) {
if (!isObject(*layoutValue)) {
error.message = "layout must be an object";
return nullopt;
}
optional<Error> error_ = eachMember(*layoutValue, [&] (const std::string& k, const Convertible& v) {
return layer->setLayoutProperty(k, v);
});
if (error_) {
error = *error_;
return nullopt;
}
}
optional<Error> error_ = setPaintProperties(*layer, value);
if (error_) {
error = *error_;
return nullopt;
}
return std::move(layer);
}
return {};
}
return { *defaultValue };
}
template <class T>
struct Converter<SourceFunction<T>> {
template <class V>
optional<SourceFunction<T>> operator()(const V& value, Error& error) const {
if (!isObject(value)) {
error = { "function must be an object" };
return {};
}
auto propertyValue = objectMember(value, "property");
if (!propertyValue) {
error = { "function must specify property" };
return {};
}
auto propertyString = toString(*propertyValue);
if (!propertyString) {
error = { "function property must be a string" };
return {};
}
auto stops = StopsConverter<T, typename SourceFunction<T>::Stops>()(value, error);
if (!stops) {
return {};
}
optional<std::unique_ptr<Layer>> operator()(const V& value, Error& error) const {
if (!isObject(value)) {
error = { "layer must be an object" };
return {};
}
auto idValue = objectMember(value, "id");
if (!idValue) {
error = { "layer must have an id" };
return {};
}
optional<std::string> id = toString(*idValue);
if (!id) {
error = { "layer id must be a string" };
return {};
}
auto typeValue = objectMember(value, "type");
if (!typeValue) {
error = { "layer must have a type" };
return {};
}
optional<std::string> type = toString(*typeValue);
if (!type) {
error = { "layer type must be a string" };
return {};
}
optional<std::unique_ptr<Layer>> converted;
if (*type == "fill") {
converted = convertVectorLayer<FillLayer>(*id, value, error);
} else if (*type == "fill-extrusion") {
converted = convertVectorLayer<FillExtrusionLayer>(*id, value, error);
} else if (*type == "line") {
converted = convertVectorLayer<LineLayer>(*id, value, error);
} else if (*type == "circle") {
converted = convertVectorLayer<CircleLayer>(*id, value, error);
} else if (*type == "symbol") {
converted = convertVectorLayer<SymbolLayer>(*id, value, error);
} else if (*type == "raster") {
converted = convertRasterLayer(*id, value, error);
} else if (*type == "background") {
converted = convertBackgroundLayer(*id, value, error);
} else {
error = { "invalid layer type" };
return {};
}
if (!converted) {
return converted;
}
std::unique_ptr<Layer> layer = std::move(*converted);
auto minzoomValue = objectMember(value, "minzoom");
if (minzoomValue) {
optional<float> minzoom = toNumber(*minzoomValue);
if (!minzoom) {
error = { "minzoom must be numeric" };
return {};
}
layer->setMinZoom(*minzoom);
}
auto maxzoomValue = objectMember(value, "maxzoom");
if (maxzoomValue) {
optional<float> maxzoom = toNumber(*maxzoomValue);
if (!maxzoom) {
error = { "maxzoom must be numeric" };
return {};
}
layer->setMaxZoom(*maxzoom);
}
auto layoutValue = objectMember(value, "layout");
if (layoutValue) {
if (!isObject(*layoutValue)) {
error = { "layout must be an object" };
return {};
}
optional<Error> error_ = eachMember(*layoutValue, [&] (const std::string& k, const V& v) {
return setLayoutProperty(*layer, k, v);
});
if (error_) {
error = *error_;
return {};
}
}
optional<Error> error_ = setPaintProperties(*layer, value);
if (error_) {
error = *error_;
return {};
}
return std::move(layer);
}
optional<Light> Converter<Light>::operator()(const Convertible& value, Error& error) const {
if (!isObject(value)) {
error.message = "light must be an object";
return nullopt;
}
Light light;
const auto anchor = objectMember(value, "anchor");
if (anchor) {
optional<PropertyValue<LightAnchorType>> convertedAnchor =
convert<PropertyValue<LightAnchorType>>(*anchor, error, false, false);
if (convertedAnchor) {
light.setAnchor(*convertedAnchor);
} else {
return nullopt;
}
}
const auto anchorTransition = objectMember(value, "anchor-transition");
if (anchorTransition) {
optional<TransitionOptions> transition =
convert<TransitionOptions>(*anchorTransition, error);
if (transition) {
light.setAnchorTransition(*transition);
} else {
return nullopt;
}
}
const auto color = objectMember(value, "color");
if (color) {
optional<PropertyValue<Color>> convertedColor =
convert<PropertyValue<Color>>(*color, error, false, false);
if (convertedColor) {
light.setColor(*convertedColor);
} else {
return nullopt;
}
}
const auto colorTransition = objectMember(value, "color-transition");
if (colorTransition) {
optional<TransitionOptions> transition =
convert<TransitionOptions>(*colorTransition, error);
if (transition) {
light.setColorTransition(*transition);
} else {
return nullopt;
}
}
const auto position = objectMember(value, "position");
if (position) {
optional<PropertyValue<Position>> convertedPosition =
convert<PropertyValue<Position>>(*position, error, false, false);
if (convertedPosition) {
light.setPosition(*convertedPosition);
} else {
return nullopt;
}
}
const auto positionTransition = objectMember(value, "position-transition");
if (positionTransition) {
optional<TransitionOptions> transition =
convert<TransitionOptions>(*positionTransition, error);
if (transition) {
light.setPositionTransition(*transition);
} else {
return nullopt;
}
}
const auto intensity = objectMember(value, "intensity");
if (intensity) {
optional<PropertyValue<float>> convertedIntensity =
convert<PropertyValue<float>>(*intensity, error, false, false);
if (convertedIntensity) {
light.setIntensity(*convertedIntensity);
} else {
return nullopt;
}
}
const auto intensityTransition = objectMember(value, "intensity-transition");
if (intensityTransition) {
optional<TransitionOptions> transition =
convert<TransitionOptions>(*intensityTransition, error);
if (transition) {
light.setIntensityTransition(*transition);
} else {
return nullopt;
}
}
return { std::move(light) };
}