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-rw-r--r--include/mbgl/style/conversion/function.hpp400
-rw-r--r--include/mbgl/style/conversion/property_value.hpp1
-rw-r--r--include/mbgl/style/expression/dsl.hpp4
-rw-r--r--include/mbgl/style/expression/error.hpp39
-rw-r--r--include/mbgl/style/function/categorical_stops.hpp40
-rw-r--r--include/mbgl/style/function/composite_categorical_stops.hpp30
-rw-r--r--include/mbgl/style/function/composite_exponential_stops.hpp35
-rw-r--r--include/mbgl/style/function/composite_interval_stops.hpp32
-rw-r--r--include/mbgl/style/function/convert.hpp322
-rw-r--r--include/mbgl/style/function/exponential_stops.hpp56
-rw-r--r--include/mbgl/style/function/identity_stops.hpp20
-rw-r--r--include/mbgl/style/function/interval_stops.hpp51
12 files changed, 64 insertions, 966 deletions
diff --git a/include/mbgl/style/conversion/function.hpp b/include/mbgl/style/conversion/function.hpp
index 932925c53c..5ddede324b 100644
--- a/include/mbgl/style/conversion/function.hpp
+++ b/include/mbgl/style/conversion/function.hpp
@@ -3,224 +3,15 @@
#include <mbgl/style/function/camera_function.hpp>
#include <mbgl/style/function/source_function.hpp>
#include <mbgl/style/function/composite_function.hpp>
-#include <mbgl/style/function/convert.hpp>
-#include <mbgl/style/function/categorical_stops.hpp>
-#include <mbgl/style/function/exponential_stops.hpp>
-#include <mbgl/style/function/interval_stops.hpp>
-#include <mbgl/style/function/identity_stops.hpp>
-#include <mbgl/style/function/composite_exponential_stops.hpp>
-#include <mbgl/style/function/composite_interval_stops.hpp>
-#include <mbgl/style/function/composite_categorical_stops.hpp>
#include <mbgl/style/conversion.hpp>
#include <mbgl/style/conversion/constant.hpp>
-#include <mbgl/util/ignore.hpp>
-#include <mbgl/util/variant.hpp>
+#include <mbgl/style/expression/expression.hpp>
+#include <mbgl/style/expression/value.hpp>
namespace mbgl {
namespace style {
namespace conversion {
-template <class D, class R>
-optional<std::map<D, R>> convertStops(const Convertible& 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;
-}
-
-template <class T>
-struct Converter<ExponentialStops<T>> {
- static constexpr const char * type = "exponential";
-
- optional<ExponentialStops<T>> operator()(const Convertible& 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);
- }
-};
-
-template <class T>
-struct Converter<IntervalStops<T>> {
- static constexpr const char * type = "interval";
-
- optional<IntervalStops<T>> operator()(const Convertible& value, Error& error) const {
- auto stops = convertStops<float, T>(value, error);
- if (!stops) {
- return {};
- }
- return IntervalStops<T>(*stops);
- }
-};
-
-template <>
-struct Converter<CategoricalValue> {
- optional<CategoricalValue> operator()(const Convertible& value, Error& error) const {
- auto b = toBool(value);
- if (b) {
- return { *b };
- }
-
- auto n = toNumber(value);
- if (n) {
- return { int64_t(*n) };
- }
-
- auto s = toString(value);
- if (s) {
- return { *s };
- }
-
- error = { "stop domain value must be a number, string, or boolean" };
- return {};
- }
-};
-
-template <class T>
-struct Converter<CategoricalStops<T>> {
- static constexpr const char * type = "categorical";
-
- optional<CategoricalStops<T>> operator()(const Convertible& value, Error& error) const {
- auto stops = convertStops<CategoricalValue, T>(value, error);
- if (!stops) {
- return {};
- }
- return CategoricalStops<T>(
- std::map<CategoricalValue, T>((*stops).begin(), (*stops).end()));
- }
-};
-
-template <class T>
-struct Converter<IdentityStops<T>> {
- static constexpr const char * type = "identity";
-
- optional<IdentityStops<T>> operator()(const Convertible&, Error&) const {
- return IdentityStops<T>();
- }
-};
-
-template <class, class>
-struct StopsConverter;
-
-template <class T, class... Ts>
-struct StopsConverter<T, variant<Ts...>> {
-public:
- optional<variant<Ts...>> operator()(const Convertible& 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;
- }
-};
-
-template <class T>
-struct Converter<CameraFunction<T>> {
- optional<CameraFunction<T>> operator()(const Convertible& value, Error& error) const {
- if (!isObject(value)) {
- error = { "function must be an object" };
- return {};
- }
-
- using Stops = std::conditional_t<
- util::Interpolatable<T>::value,
- variant<
- ExponentialStops<T>,
- IntervalStops<T>>,
- variant<
- IntervalStops<T>>>;
-
- auto stops = StopsConverter<T, Stops>()(value, error);
- if (!stops) {
- return {};
- }
-
- return CameraFunction<T>((*stops).match([&] (const auto& s) {
- return expression::Convert::toExpression(s);
- }), false);
- }
-};
-
template <class T>
optional<optional<T>> convertDefaultValue(const Convertible& value, Error& error) {
auto defaultValueValue = objectMember(value, "default");
@@ -237,199 +28,48 @@ optional<optional<T>> convertDefaultValue(const Convertible& value, Error& error
return { *defaultValue };
}
-template <class T>
-struct Converter<SourceFunction<T>> {
- optional<SourceFunction<T>> operator()(const Convertible& 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 {};
- }
-
- using Stops = std::conditional_t<
- util::Interpolatable<T>::value,
- variant<
- ExponentialStops<T>,
- IntervalStops<T>,
- CategoricalStops<T>,
- IdentityStops<T>>,
- variant<
- IntervalStops<T>,
- CategoricalStops<T>,
- IdentityStops<T>>>;
-
- auto stops = StopsConverter<T, Stops>()(value, error);
- if (!stops) {
- return {};
- }
-
- auto defaultValue = convertDefaultValue<T>(value, error);
- if (!defaultValue) {
- return {};
- }
-
- return SourceFunction<T>((*stops).match([&] (const auto& s) {
- return expression::Convert::toExpression(*propertyString, s);
- }), *defaultValue);
- }
-};
-
-template <class S>
-struct CompositeValue : std::pair<float, S> {
- using std::pair<float, S>::pair;
-};
-
-template <class S>
-struct Converter<CompositeValue<S>> {
- optional<CompositeValue<S>> operator()(const Convertible& value, Error& error) const {
- if (!isObject(value)) {
- error = { "stop must be an object" };
- return {};
- }
-
- auto zoomValue = objectMember(value, "zoom");
- if (!zoomValue) {
- error = { "stop must specify zoom" };
- return {};
- }
-
- auto propertyValue = objectMember(value, "value");
- if (!propertyValue) {
- error = { "stop must specify value" };
- return {};
- }
-
- optional<float> z = convert<float>(*zoomValue, error);
- if (!z) {
- return {};
- }
-
- optional<S> s = convert<S>(*propertyValue, error);
- if (!s) {
- return {};
- }
-
- return CompositeValue<S> { *z, *s };
- }
-};
+optional<std::unique_ptr<expression::Expression>> convertCameraFunctionToExpression(expression::type::Type, const Convertible&, Error&);
+optional<std::unique_ptr<expression::Expression>> convertSourceFunctionToExpression(expression::type::Type, const Convertible&, Error&);
+optional<std::unique_ptr<expression::Expression>> convertCompositeFunctionToExpression(expression::type::Type, const Convertible&, Error&);
template <class T>
-struct Converter<CompositeExponentialStops<T>> {
- static constexpr const char * type = "exponential";
-
- optional<CompositeExponentialStops<T>> operator()(const Convertible& value, Error& error) const {
- auto stops = convertStops<CompositeValue<float>, T>(value, error);
- if (!stops) {
+struct Converter<CameraFunction<T>> {
+ optional<CameraFunction<T>> operator()(const Convertible& value, Error& error) const {
+ auto expression = convertCameraFunctionToExpression(expression::valueTypeToExpressionType<T>(), value, error);
+ if (!expression) {
return {};
}
-
- auto base = 1.0f;
- auto baseValue = objectMember(value, "base");
- if (baseValue && toNumber(*baseValue)) {
- base = *toNumber(*baseValue);
- }
-
- std::map<float, std::map<float, T>> convertedStops;
- for (const auto& stop : *stops) {
- convertedStops[stop.first.first].emplace(stop.first.second, stop.second);
- }
-
- return CompositeExponentialStops<T>(convertedStops, base);
+ return CameraFunction<T>(std::move(*expression), false);
}
};
template <class T>
-struct Converter<CompositeIntervalStops<T>> {
- static constexpr const char * type = "interval";
-
- optional<CompositeIntervalStops<T>> operator()(const Convertible& value, Error& error) const {
- auto stops = convertStops<CompositeValue<float>, T>(value, error);
- if (!stops) {
+struct Converter<SourceFunction<T>> {
+ optional<SourceFunction<T>> operator()(const Convertible& value, Error& error) const {
+ auto expression = convertSourceFunctionToExpression(expression::valueTypeToExpressionType<T>(), value, error);
+ if (!expression) {
return {};
}
-
- std::map<float, std::map<float, T>> convertedStops;
- for (const auto& stop : *stops) {
- convertedStops[stop.first.first].emplace(stop.first.second, stop.second);
- }
-
- return CompositeIntervalStops<T>(convertedStops);
- }
-};
-
-template <class T>
-struct Converter<CompositeCategoricalStops<T>> {
- static constexpr const char * type = "categorical";
-
- optional<CompositeCategoricalStops<T>> operator()(const Convertible& value, Error& error) const {
- auto stops = convertStops<CompositeValue<CategoricalValue>, T>(value, error);
- if (!stops) {
+ auto defaultValue = convertDefaultValue<T>(value, error);
+ if (!defaultValue) {
return {};
}
-
- std::map<float, std::map<CategoricalValue, T>> convertedStops;
- for (const auto& stop : *stops) {
- convertedStops[stop.first.first].emplace(stop.first.second, stop.second);
- }
-
- return CompositeCategoricalStops<T>(convertedStops);
+ return SourceFunction<T>(std::move(*expression), *defaultValue);
}
};
template <class T>
struct Converter<CompositeFunction<T>> {
optional<CompositeFunction<T>> operator()(const Convertible& value, Error& error) const {
- if (!isObject(value)) {
- error = { "function must be an object" };
+ auto expression = convertCompositeFunctionToExpression(expression::valueTypeToExpressionType<T>(), value, error);
+ if (!expression) {
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 {};
- }
-
- using Stops = std::conditional_t<
- util::Interpolatable<T>::value,
- variant<
- CompositeExponentialStops<T>,
- CompositeIntervalStops<T>,
- CompositeCategoricalStops<T>>,
- variant<
- CompositeIntervalStops<T>,
- CompositeCategoricalStops<T>>>;
-
- auto stops = StopsConverter<T, Stops>()(value, error);
- if (!stops) {
- return {};
- }
-
auto defaultValue = convertDefaultValue<T>(value, error);
if (!defaultValue) {
return {};
}
-
- return CompositeFunction<T>((*stops).match([&] (const auto& s) {
- return expression::Convert::toExpression(*propertyString, s);
- }), *defaultValue);
+ return CompositeFunction<T>(std::move(*expression), *defaultValue);
}
};
diff --git a/include/mbgl/style/conversion/property_value.hpp b/include/mbgl/style/conversion/property_value.hpp
index dc1c32830f..e52c63d023 100644
--- a/include/mbgl/style/conversion/property_value.hpp
+++ b/include/mbgl/style/conversion/property_value.hpp
@@ -9,6 +9,7 @@
#include <mbgl/style/expression/is_expression.hpp>
#include <mbgl/style/expression/find_zoom_curve.hpp>
#include <mbgl/style/expression/parsing_context.hpp>
+#include <mbgl/style/expression/literal.hpp>
namespace mbgl {
namespace style {
diff --git a/include/mbgl/style/expression/dsl.hpp b/include/mbgl/style/expression/dsl.hpp
index 8a5d1d84f5..22278b0975 100644
--- a/include/mbgl/style/expression/dsl.hpp
+++ b/include/mbgl/style/expression/dsl.hpp
@@ -5,6 +5,7 @@
#include <mbgl/style/expression/interpolator.hpp>
#include <memory>
+#include <string>
#include <initializer_list>
namespace mbgl {
@@ -15,6 +16,8 @@ namespace dsl {
// This convenience API does little to no expression validation or type-checking, and is intended for
// use only by test and other non-production code.
+std::unique_ptr<Expression> error(std::string);
+
std::unique_ptr<Expression> literal(const char* value);
std::unique_ptr<Expression> literal(Value value);
std::unique_ptr<Expression> literal(std::initializer_list<double> value);
@@ -22,6 +25,7 @@ std::unique_ptr<Expression> literal(std::initializer_list<const char *> value);
std::unique_ptr<Expression> number(std::unique_ptr<Expression>);
std::unique_ptr<Expression> string(std::unique_ptr<Expression>);
+std::unique_ptr<Expression> boolean(std::unique_ptr<Expression>);
std::unique_ptr<Expression> toColor(const char* value);
std::unique_ptr<Expression> toColor(std::unique_ptr<Expression>);
diff --git a/include/mbgl/style/expression/error.hpp b/include/mbgl/style/expression/error.hpp
new file mode 100644
index 0000000000..bfb9247d11
--- /dev/null
+++ b/include/mbgl/style/expression/error.hpp
@@ -0,0 +1,39 @@
+#pragma once
+
+#include <mbgl/style/expression/expression.hpp>
+
+#include <string>
+
+namespace mbgl {
+namespace style {
+namespace expression {
+
+class Error : public Expression {
+public:
+ Error(std::string message_)
+ : Expression(type::Error),
+ message(std::move(message_)) {}
+
+ void eachChild(const std::function<void(const Expression&)>&) const override {}
+
+ bool operator==(const Expression& e) const override {
+ return dynamic_cast<const Error*>(&e);
+ }
+
+ EvaluationResult evaluate(const EvaluationContext&) const override {
+ return EvaluationError{message};
+ }
+
+ std::vector<optional<Value>> possibleOutputs() const override {
+ return {};
+ }
+
+ std::string getOperator() const override { return "error"; }
+
+private:
+ std::string message;
+};
+
+} // namespace expression
+} // namespace style
+} // namespace mbgl
diff --git a/include/mbgl/style/function/categorical_stops.hpp b/include/mbgl/style/function/categorical_stops.hpp
deleted file mode 100644
index c8505115ab..0000000000
--- a/include/mbgl/style/function/categorical_stops.hpp
+++ /dev/null
@@ -1,40 +0,0 @@
-#pragma once
-
-#include <mbgl/util/feature.hpp>
-#include <mbgl/util/variant.hpp>
-
-#include <cassert>
-#include <utility>
-#include <map>
-
-namespace mbgl {
-namespace style {
-
-class CategoricalValue : public variant<bool, int64_t, std::string> {
-public:
- using variant<bool, int64_t, std::string>::variant;
-};
-
-template <class T>
-class CategoricalStops {
-public:
- using Stops = std::map<CategoricalValue, T>;
-
- Stops stops;
-
- CategoricalStops() = default;
- CategoricalStops(Stops stops_)
- : stops(std::move(stops_)) {
- assert(stops.size() > 0);
- }
-
- optional<T> evaluate(const Value&) const;
-
- friend bool operator==(const CategoricalStops& lhs,
- const CategoricalStops& rhs) {
- return lhs.stops == rhs.stops;
- }
-};
-
-} // namespace style
-} // namespace mbgl
diff --git a/include/mbgl/style/function/composite_categorical_stops.hpp b/include/mbgl/style/function/composite_categorical_stops.hpp
deleted file mode 100644
index b796621d1a..0000000000
--- a/include/mbgl/style/function/composite_categorical_stops.hpp
+++ /dev/null
@@ -1,30 +0,0 @@
-#pragma once
-
-#include <mbgl/style/function/categorical_stops.hpp>
-
-namespace mbgl {
-namespace style {
-
-template <class T>
-class CompositeCategoricalStops {
-public:
- using Stops = std::map<float, std::map<CategoricalValue, T>>;
- Stops stops;
-
- CompositeCategoricalStops() = default;
- CompositeCategoricalStops(Stops stops_)
- : stops(std::move(stops_)) {
- }
-
- CategoricalStops<T> innerStops(const std::map<CategoricalValue, T>& stops_) const {
- return CategoricalStops<T>(stops_);
- }
-
- friend bool operator==(const CompositeCategoricalStops& lhs,
- const CompositeCategoricalStops& rhs) {
- return lhs.stops == rhs.stops;
- }
-};
-
-} // namespace style
-} // namespace mbgl
diff --git a/include/mbgl/style/function/composite_exponential_stops.hpp b/include/mbgl/style/function/composite_exponential_stops.hpp
deleted file mode 100644
index f1ad32a04d..0000000000
--- a/include/mbgl/style/function/composite_exponential_stops.hpp
+++ /dev/null
@@ -1,35 +0,0 @@
-#pragma once
-
-#include <mbgl/style/function/exponential_stops.hpp>
-
-#include <map>
-
-namespace mbgl {
-namespace style {
-
-template <class T>
-class CompositeExponentialStops {
-public:
- using Stops = std::map<float, std::map<float, T>>;
-
- Stops stops;
- float base = 1.0f;
-
- CompositeExponentialStops() = default;
- CompositeExponentialStops(Stops stops_, float base_ = 1.0f)
- : stops(std::move(stops_)),
- base(base_) {
- }
-
- ExponentialStops<T> innerStops(const std::map<float, T>& stops_) const {
- return ExponentialStops<T>(stops_, base);
- }
-
- friend bool operator==(const CompositeExponentialStops& lhs,
- const CompositeExponentialStops& rhs) {
- return lhs.stops == rhs.stops && lhs.base == rhs.base;
- }
-};
-
-} // namespace style
-} // namespace mbgl
diff --git a/include/mbgl/style/function/composite_interval_stops.hpp b/include/mbgl/style/function/composite_interval_stops.hpp
deleted file mode 100644
index 3c495f2a7f..0000000000
--- a/include/mbgl/style/function/composite_interval_stops.hpp
+++ /dev/null
@@ -1,32 +0,0 @@
-#pragma once
-
-#include <mbgl/style/function/interval_stops.hpp>
-
-#include <map>
-
-namespace mbgl {
-namespace style {
-
-template <class T>
-class CompositeIntervalStops {
-public:
- using Stops = std::map<float, std::map<float, T>>;
- Stops stops;
-
- CompositeIntervalStops() = default;
- CompositeIntervalStops(Stops stops_)
- : stops(std::move(stops_)) {
- }
-
- IntervalStops<T> innerStops(const std::map<float, T>& stops_) const {
- return IntervalStops<T>(stops_);
- }
-
- friend bool operator==(const CompositeIntervalStops& lhs,
- const CompositeIntervalStops& rhs) {
- return lhs.stops == rhs.stops;
- }
-};
-
-} // namespace style
-} // namespace mbgl
diff --git a/include/mbgl/style/function/convert.hpp b/include/mbgl/style/function/convert.hpp
deleted file mode 100644
index a0dae992fa..0000000000
--- a/include/mbgl/style/function/convert.hpp
+++ /dev/null
@@ -1,322 +0,0 @@
-#pragma once
-
-#include <mbgl/style/expression/array_assertion.hpp>
-#include <mbgl/style/expression/assertion.hpp>
-#include <mbgl/style/expression/case.hpp>
-#include <mbgl/style/expression/coalesce.hpp>
-#include <mbgl/style/expression/compound_expression.hpp>
-#include <mbgl/style/expression/coercion.hpp>
-#include <mbgl/style/expression/interpolate.hpp>
-#include <mbgl/style/expression/expression.hpp>
-#include <mbgl/style/expression/literal.hpp>
-#include <mbgl/style/expression/match.hpp>
-#include <mbgl/style/expression/step.hpp>
-
-#include <mbgl/style/function/exponential_stops.hpp>
-#include <mbgl/style/function/interval_stops.hpp>
-#include <mbgl/style/function/categorical_stops.hpp>
-#include <mbgl/style/function/composite_exponential_stops.hpp>
-#include <mbgl/style/function/composite_interval_stops.hpp>
-#include <mbgl/style/function/composite_categorical_stops.hpp>
-#include <mbgl/style/function/identity_stops.hpp>
-
-#include <mbgl/util/enum.hpp>
-#include <mbgl/style/types.hpp>
-
-#include <string>
-
-
-namespace mbgl {
-namespace style {
-namespace expression {
-
-namespace detail {
-
-class ErrorExpression : public Expression {
-public:
- ErrorExpression(std::string message_) : Expression(type::Error), message(std::move(message_)) {}
- void eachChild(const std::function<void(const Expression&)>&) const override {}
-
- bool operator==(const Expression& e) const override {
- return dynamic_cast<const ErrorExpression*>(&e);
- }
-
- EvaluationResult evaluate(const EvaluationContext&) const override {
- return EvaluationError{message};
- }
-
- std::vector<optional<Value>> possibleOutputs() const override {
- return {};
- }
-
- std::string getOperator() const override { return "error"; }
-private:
- std::string message;
-};
-
-} // namespace detail
-
-
-// Create expressions representing 'classic' (i.e. stop-based) style functions
-
-struct Convert {
- template <typename T>
- static std::unique_ptr<Literal> makeLiteral(const T& value) {
- return std::make_unique<Literal>(Value(toExpressionValue(value)));
- }
-
- static std::unique_ptr<Expression> makeGet(type::Type type, const std::string& property) {
- ParsingContext ctx;
- std::vector<std::unique_ptr<Expression>> getArgs;
- getArgs.push_back(makeLiteral(property));
- ParseResult get = createCompoundExpression("get", std::move(getArgs), ctx);
- assert(get);
- assert(ctx.getErrors().size() == 0);
-
- std::vector<std::unique_ptr<Expression>> assertionArgs;
- assertionArgs.push_back(std::move(*get));
-
- return std::make_unique<Assertion>(type, std::move(assertionArgs));
- }
-
- static std::unique_ptr<Expression> makeZoom() {
- ParsingContext ctx;
- ParseResult zoom = createCompoundExpression("zoom", std::vector<std::unique_ptr<Expression>>(), ctx);
- assert(zoom);
- assert(ctx.getErrors().size() == 0);
- return std::move(*zoom);
- }
-
- static std::unique_ptr<Expression> makeError(std::string message) {
- return std::make_unique<detail::ErrorExpression>(message);
- }
-
- template <typename Key>
- static ParseResult makeMatch(type::Type type,
- std::unique_ptr<Expression> input,
- std::map<CategoricalValue, std::unique_ptr<Expression>> stops) {
- // match expression
- typename Match<Key>::Branches branches;
- for(auto it = stops.begin(); it != stops.end(); it++) {
- assert(it->first.template is<Key>());
- Key key = it->first.template get<Key>();
- branches.emplace(
- std::move(key),
- std::move(it->second)
- );
- }
-
- return ParseResult(std::make_unique<Match<Key>>(std::move(type),
- std::move(input),
- std::move(branches),
- makeError("No matching label")));
- }
-
- static ParseResult makeCase(type::Type type,
- std::unique_ptr<Expression> input,
- std::map<CategoricalValue, std::unique_ptr<Expression>> stops) {
- // case expression
- std::vector<typename Case::Branch> branches;
-
- auto it = stops.find(true);
- std::unique_ptr<Expression> true_case = it == stops.end() ?
- makeError("No matching label") :
- std::move(it->second);
-
- it = stops.find(false);
- std::unique_ptr<Expression> false_case = it == stops.end() ?
- makeError("No matching label") :
- std::move(it->second);
-
- branches.push_back(std::make_pair(std::move(input), std::move(true_case)));
- return ParseResult(std::make_unique<Case>(std::move(type), std::move(branches), std::move(false_case)));
- }
-
- template <typename T>
- static ParseResult fromCategoricalStops(std::map<CategoricalValue, T> stops, const std::string& property) {
- assert(stops.size() > 0);
-
- std::map<CategoricalValue, std::unique_ptr<Expression>> convertedStops;
- for(const std::pair<CategoricalValue, T>& stop : stops) {
- convertedStops.emplace(
- stop.first,
- makeLiteral(stop.second)
- );
- }
-
- type::Type type = valueTypeToExpressionType<T>();
-
- const CategoricalValue& firstKey = stops.begin()->first;
- return firstKey.match(
- [&](bool) {
- return makeCase(type, makeGet(type::Boolean, property), std::move(convertedStops));
- },
- [&](const std::string&) {
- return makeMatch<std::string>(type, makeGet(type::String, property), std::move(convertedStops));
- },
- [&](int64_t) {
- return makeMatch<int64_t>(type, makeGet(type::Number, property), std::move(convertedStops));
- }
- );
- }
-
- template <typename T>
- static std::map<double, std::unique_ptr<Expression>> convertStops(const std::map<float, T>& stops) {
- std::map<double, std::unique_ptr<Expression>> convertedStops;
- for(const auto& stop : stops) {
- convertedStops.emplace(
- stop.first,
- makeLiteral(stop.second)
- );
- }
- return convertedStops;
- }
-
- template <typename T>
- static std::unique_ptr<Expression> toExpression(const ExponentialStops<T>& stops)
- {
- ParsingContext ctx;
- ParseResult e = createInterpolate(valueTypeToExpressionType<T>(),
- ExponentialInterpolator(stops.base),
- makeZoom(),
- convertStops(stops.stops),
- ctx);
- assert(e);
- return std::move(*e);
- }
-
- template <typename T>
- static std::unique_ptr<Expression> toExpression(const IntervalStops<T>& stops)
- {
- ParseResult e(std::make_unique<Step>(valueTypeToExpressionType<T>(),
- makeZoom(),
- convertStops(stops.stops)));
- assert(e);
- return std::move(*e);
- }
-
- template <typename T>
- static std::unique_ptr<Expression> toExpression(const std::string& property,
- const ExponentialStops<T>& stops)
- {
- ParsingContext ctx;
- ParseResult e = createInterpolate(valueTypeToExpressionType<T>(),
- ExponentialInterpolator(stops.base),
- makeGet(type::Number, property),
- convertStops(stops.stops),
- ctx);
- assert(e);
- return std::move(*e);
- }
-
- template <typename T>
- static std::unique_ptr<Expression> toExpression(const std::string& property,
- const IntervalStops<T>& stops)
- {
- std::unique_ptr<Expression> get = makeGet(type::Number, property);
- ParseResult e(std::make_unique<Step>(valueTypeToExpressionType<T>(),
- std::move(get),
- convertStops(stops.stops)));
- assert(e);
- return std::move(*e);
- }
-
- template <typename T>
- static std::unique_ptr<Expression> toExpression(const std::string& property,
- const CategoricalStops<T>& stops)
- {
- ParseResult expr = fromCategoricalStops(stops.stops, property);
- assert(expr);
- return std::move(*expr);
- }
-
- // interpolatable zoom curve
- template <typename T>
- static typename std::enable_if_t<util::Interpolatable<T>::value,
- ParseResult> makeZoomCurve(std::map<double, std::unique_ptr<Expression>> stops) {
- ParsingContext ctx;
- return createInterpolate(valueTypeToExpressionType<T>(),
- ExponentialInterpolator(1.0),
- makeZoom(),
- std::move(stops),
- ctx);
- }
-
- // non-interpolatable zoom curve
- template <typename T>
- static typename std::enable_if_t<!util::Interpolatable<T>::value,
- ParseResult> makeZoomCurve(std::map<double, std::unique_ptr<Expression>> stops) {
- return ParseResult(std::make_unique<Step>(valueTypeToExpressionType<T>(), makeZoom(), std::move(stops)));
- }
-
- template <typename T>
- static std::unique_ptr<Expression> toExpression(const std::string& property,
- const CompositeExponentialStops<T>& stops)
- {
- ParsingContext ctx;
-
- std::map<double, std::unique_ptr<Expression>> outerStops;
- for (const std::pair<float, std::map<float, T>>& stop : stops.stops) {
- ParseResult innerInterpolate = createInterpolate(valueTypeToExpressionType<T>(),
- ExponentialInterpolator(stops.base),
- makeGet(type::Number, property),
- convertStops(stop.second),
- ctx);
- assert(innerInterpolate);
- outerStops.emplace(stop.first, std::move(*innerInterpolate));
- }
-
- ParseResult zoomCurve = makeZoomCurve<T>(std::move(outerStops));
- assert(zoomCurve);
- return std::move(*zoomCurve);
- }
-
- template <typename T>
- static std::unique_ptr<Expression> toExpression(const std::string& property,
- const CompositeIntervalStops<T>& stops)
- {
- std::map<double, std::unique_ptr<Expression>> outerStops;
- for (const std::pair<float, std::map<float, T>>& stop : stops.stops) {
- std::unique_ptr<Expression> get = makeGet(type::Number, property);
- ParseResult innerInterpolate(std::make_unique<Step>(valueTypeToExpressionType<T>(),
- std::move(get),
- convertStops(stop.second)));
- assert(innerInterpolate);
- outerStops.emplace(stop.first, std::move(*innerInterpolate));
- }
-
- ParseResult zoomCurve = makeZoomCurve<T>(std::move(outerStops));
- assert(zoomCurve);
- return std::move(*zoomCurve);
- }
-
- template <typename T>
- static std::unique_ptr<Expression> toExpression(const std::string& property,
- const CompositeCategoricalStops<T>& stops)
- {
- std::map<double, std::unique_ptr<Expression>> outerStops;
- for (const std::pair<float, std::map<CategoricalValue, T>>& stop : stops.stops) {
- ParseResult innerInterpolate = fromCategoricalStops(stop.second, property);
- assert(innerInterpolate);
- outerStops.emplace(stop.first, std::move(*innerInterpolate));
- }
-
- ParseResult zoomCurve = makeZoomCurve<T>(std::move(outerStops));
- assert(zoomCurve);
- return std::move(*zoomCurve);
- }
-
- template <typename T>
- static std::unique_ptr<Expression> toExpression(const std::string& property,
- const IdentityStops<T>&)
- {
- return fromIdentityFunction(property, expression::valueTypeToExpressionType<T>());
- }
-
-private:
- static std::unique_ptr<Expression> fromIdentityFunction(const std::string& property, type::Type type);
-};
-
-} // namespace expression
-} // namespace style
-} // namespace mbgl
diff --git a/include/mbgl/style/function/exponential_stops.hpp b/include/mbgl/style/function/exponential_stops.hpp
deleted file mode 100644
index b3866c4059..0000000000
--- a/include/mbgl/style/function/exponential_stops.hpp
+++ /dev/null
@@ -1,56 +0,0 @@
-#pragma once
-
-#include <mbgl/util/feature.hpp>
-#include <mbgl/util/interpolate.hpp>
-
-#include <map>
-
-namespace mbgl {
-namespace style {
-
-template <class T>
-class ExponentialStops {
-public:
- using Stops = std::map<float, T>;
-
- Stops stops;
- float base = 1.0f;
-
- ExponentialStops() = default;
- ExponentialStops(Stops stops_, float base_ = 1.0f)
- : stops(std::move(stops_)),
- base(base_) {
- }
-
- optional<T> evaluate(float z) const {
- if (stops.empty()) {
- return {};
- }
-
- auto it = stops.upper_bound(z);
- if (it == stops.end()) {
- return stops.rbegin()->second;
- } else if (it == stops.begin()) {
- return stops.begin()->second;
- } else {
- return util::interpolate(std::prev(it)->second, it->second,
- util::interpolationFactor(base, { std::prev(it)->first, it->first }, z));
- }
- }
-
- optional<T> evaluate(const Value& value) const {
- optional<float> z = numericValue<float>(value);
- if (!z) {
- return {};
- }
- return evaluate(*z);
- }
-
- friend bool operator==(const ExponentialStops& lhs,
- const ExponentialStops& rhs) {
- return lhs.stops == rhs.stops && lhs.base == rhs.base;
- }
-};
-
-} // namespace style
-} // namespace mbgl
diff --git a/include/mbgl/style/function/identity_stops.hpp b/include/mbgl/style/function/identity_stops.hpp
deleted file mode 100644
index 741ebbbe0c..0000000000
--- a/include/mbgl/style/function/identity_stops.hpp
+++ /dev/null
@@ -1,20 +0,0 @@
-#pragma once
-
-#include <mbgl/util/feature.hpp>
-
-namespace mbgl {
-namespace style {
-
-template <class T>
-class IdentityStops {
-public:
- optional<T> evaluate(const Value&) const;
-
- friend bool operator==(const IdentityStops&,
- const IdentityStops&) {
- return true;
- }
-};
-
-} // namespace style
-} // namespace mbgl
diff --git a/include/mbgl/style/function/interval_stops.hpp b/include/mbgl/style/function/interval_stops.hpp
deleted file mode 100644
index 45e2dc6f2e..0000000000
--- a/include/mbgl/style/function/interval_stops.hpp
+++ /dev/null
@@ -1,51 +0,0 @@
-#pragma once
-
-#include <mbgl/util/feature.hpp>
-
-#include <map>
-
-namespace mbgl {
-namespace style {
-
-template <class T>
-class IntervalStops {
-public:
- using Stops = std::map<float, T>;
- Stops stops;
-
- IntervalStops() = default;
- IntervalStops(Stops stops_)
- : stops(std::move(stops_)) {
- }
-
- optional<T> evaluate(float z) const {
- if (stops.empty()) {
- return {};
- }
-
- auto it = stops.upper_bound(z);
- if (it == stops.end()) {
- return stops.rbegin()->second;
- } else if (it == stops.begin()) {
- return stops.begin()->second;
- } else {
- return std::prev(it)->second;
- }
- }
-
- optional<T> evaluate(const Value& value) const {
- optional<float> z = numericValue<float>(value);
- if (!z) {
- return {};
- }
- return evaluate(*z);
- }
-
- friend bool operator==(const IntervalStops& lhs,
- const IntervalStops& rhs) {
- return lhs.stops == rhs.stops;
- }
-};
-
-} // namespace style
-} // namespace mbgl
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