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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 <memory>
namespace mbgl {
namespace style {
namespace expression {
class CollatorExpression : public Expression {
public:
CollatorExpression(std::unique_ptr<Expression> caseSensitive,
std::unique_ptr<Expression> diacriticSensitive,
optional<std::unique_ptr<Expression>> locale);
EvaluationResult evaluate(const EvaluationContext&) const override;
static ParseResult parse(const mbgl::style::conversion::Convertible&, ParsingContext&);
void eachChild(const std::function<void(const Expression&)>&) const override;
bool operator==(const Expression& e) const override;
std::vector<optional<Value>> possibleOutputs() const override {
// Technically the set of possible outputs is the combinatoric set of Collators produced
// by all possibleOutputs of locale/caseSensitive/diacriticSensitive
// But for the primary use of Collators in comparison operators, we ignore the Collator's
// possibleOutputs anyway, so we can get away with leaving this undefined for now.
return { nullopt };
}
mbgl::Value serialize() const override;
std::string getOperator() const override { return "collator"; }
private:
std::unique_ptr<Expression> caseSensitive;
std::unique_ptr<Expression> diacriticSensitive;
optional<std::unique_ptr<Expression>> locale;
};
} // namespace expression
} // namespace style
} // namespace mbgl
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