| 1 | #pragma once |
|---|---|
| 2 | |
| 3 | #include <mbgl/style/expression/expression.hpp> |
| 4 | #include <mbgl/style/conversion.hpp> |
| 5 | #include <memory> |
| 6 | |
| 7 | namespace mbgl { |
| 8 | namespace style { |
| 9 | namespace expression { |
| 10 | |
| 11 | class At : public Expression { |
| 12 | public: |
| 13 | At(std::unique_ptr<Expression> index_, std::unique_ptr<Expression> input_) : |
| 14 | Expression(Kind::At, input_->getType().get<type::Array>().itemType), |
| 15 | index(std::move(index_)), |
| 16 | input(std::move(input_)) |
| 17 | {} |
| 18 | |
| 19 | static ParseResult parse(const mbgl::style::conversion::Convertible& value, ParsingContext& ctx); |
| 20 | |
| 21 | EvaluationResult evaluate(const EvaluationContext& params) const override; |
| 22 | void eachChild(const std::function<void(const Expression&)>&) const override; |
| 23 | |
| 24 | bool operator==(const Expression& e) const override { |
| 25 | if (e.getKind() == Kind::At) { |
| 26 | auto rhs = static_cast<const At*>(&e); |
| 27 | return *index == *(rhs->index) && *input == *(rhs->input); |
| 28 | } |
| 29 | return false; |
| 30 | } |
| 31 | |
| 32 | std::vector<optional<Value>> possibleOutputs() const override { |
| 33 | return { nullopt }; |
| 34 | } |
| 35 | |
| 36 | std::string getOperator() const override { return "at"; } |
| 37 | |
| 38 | private: |
| 39 | std::unique_ptr<Expression> index; |
| 40 | std::unique_ptr<Expression> input; |
| 41 | }; |
| 42 | |
| 43 | } // namespace expression |
| 44 | } // namespace style |
| 45 | } // namespace mbgl |
| 46 |