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#ifndef MBGL_STYLE_FILTER_COMPARISON
#define MBGL_STYLE_FILTER_COMPARISON
#include <mbgl/style/value.hpp>
#include <vector>
#include <string>
#include <iosfwd>
namespace mbgl {
class FilterComparison {
public:
enum class Operator : uint8_t {
Equal,
NotEqual,
Greater,
GreaterEqual,
Less,
LessEqual,
In,
NotIn
};
class Instance {
public:
Instance(Operator op, std::vector<Value> &&values)
: op(op), values(values) {}
bool compare(const std::vector<Value> &property_values) const;
private:
Operator op = Operator::Equal;
std::vector<Value> values;
friend std::ostream& operator <<(std::ostream &, const Instance &);
};
public:
FilterComparison(const std::string &field) : field(field) {};
const std::string &getField() const;
template <typename Extractor> inline bool compare(const Extractor &extractor) const;
template <typename ...Args>
inline void add(Args&& ...args) {
instances.emplace_back(::std::forward<Args>(args)...);
}
private:
std::string field;
std::vector<Instance> instances;
friend std::ostream& operator <<(std::ostream &, const FilterComparison &);
};
std::ostream& operator <<(std::ostream &s, const FilterComparison &comparison);
std::ostream& operator <<(std::ostream &s, const FilterComparison::Instance &instance);
FilterComparison::Operator parseFilterComparisonOperator(const std::string &op);
}
#endif
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