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#pragma once
#include <mbgl/style/expression/expression.hpp>
#include <mbgl/style/expression/parsing_context.hpp>
#include <mbgl/style/conversion.hpp>
#include <mbgl/util/range.hpp>
#include <memory>
#include <map>
namespace mbgl {
namespace style {
namespace expression {
class Step : public Expression {
public:
Step(const type::Type& type_,
std::unique_ptr<Expression> input_,
std::map<double, std::unique_ptr<Expression>> stops_);
EvaluationResult evaluate(const EvaluationContext& params) const override;
void eachChild(const std::function<void(const Expression&)>& visit) const override;
void eachStop(const std::function<void(double, const Expression&)>& visit) const;
const std::unique_ptr<Expression>& getInput() const { return input; }
Range<float> getCoveringStops(double lower, double upper) const;
bool operator==(const Expression& e) const override;
std::vector<optional<Value>> possibleOutputs() const override;
static ParseResult parse(const mbgl::style::conversion::Convertible& value, ParsingContext& ctx);
mbgl::Value serialize() const override;
std::string getOperator() const override { return "step"; }
private:
const std::unique_ptr<Expression> input;
const std::map<double, std::unique_ptr<Expression>> stops;
};
} // namespace expression
} // namespace style
} // namespace mbgl
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