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#pragma once
#include <mbgl/style/property_value.hpp>
#include <mbgl/renderer/property_evaluation_parameters.hpp>
namespace mbgl {
template <typename T>
class PropertyEvaluator {
public:
using ResultType = T;
PropertyEvaluator(const PropertyEvaluationParameters& parameters_, T defaultValue_)
: parameters(parameters_),
defaultValue(std::move(defaultValue_)) {}
T operator()(const style::Undefined&) const { return defaultValue; }
T operator()(const T& constant) const { return constant; }
T operator()(const style::PropertyExpression<T>& fn) const { return fn.evaluate(parameters.z); }
private:
const PropertyEvaluationParameters& parameters;
T defaultValue;
};
} // namespace mbgl
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