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#pragma once
#include <mbgl/style/expression/expression.hpp>
#include <mbgl/style/conversion.hpp>
#include <memory>
namespace mbgl {
namespace style {
namespace expression {
class At : public Expression {
public:
At(std::unique_ptr<Expression> index_, std::unique_ptr<Expression> input_) :
Expression(input_->getType().get<type::Array>().itemType),
index(std::move(index_)),
input(std::move(input_))
{}
static ParseResult parse(const mbgl::style::conversion::Convertible& value, ParsingContext& ctx);
EvaluationResult evaluate(const EvaluationContext& params) const override;
void eachChild(const std::function<void(const Expression&)>&) const override;
bool operator==(const Expression& e) const override {
if (auto rhs = dynamic_cast<const At*>(&e)) {
return *index == *(rhs->index) && *input == *(rhs->input);
}
return false;
}
std::vector<optional<Value>> possibleOutputs() const override {
return { nullopt };
}
std::string getOperator() const override { return "at"; }
private:
std::unique_ptr<Expression> index;
std::unique_ptr<Expression> input;
};
} // namespace expression
} // namespace style
} // namespace mbgl
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