| 1 | #pragma once |
|---|---|
| 2 | |
| 3 | #include <mbgl/style/expression/expression.hpp> |
| 4 | #include <mbgl/style/conversion.hpp> |
| 5 | #include <mbgl/style/expression/parsing_context.hpp> |
| 6 | |
| 7 | #include <memory> |
| 8 | #include <map> |
| 9 | |
| 10 | namespace mbgl { |
| 11 | namespace style { |
| 12 | namespace expression { |
| 13 | |
| 14 | class Coalesce : public Expression { |
| 15 | public: |
| 16 | using Args = std::vector<std::unique_ptr<Expression>>; |
| 17 | Coalesce(const type::Type& type_, Args args_) : |
| 18 | Expression(Kind::Coalesce, type_), |
| 19 | args(std::move(args_)) |
| 20 | {} |
| 21 | |
| 22 | static ParseResult parse(const mbgl::style::conversion::Convertible& value, ParsingContext& ctx); |
| 23 | |
| 24 | |
| 25 | EvaluationResult evaluate(const EvaluationContext& params) const override; |
| 26 | |
| 27 | void eachChild(const std::function<void(const Expression&)>& visit) const override; |
| 28 | |
| 29 | bool operator==(const Expression& e) const override; |
| 30 | |
| 31 | std::vector<optional<Value>> possibleOutputs() const override; |
| 32 | |
| 33 | std::size_t getLength() const { |
| 34 | return args.size(); |
| 35 | } |
| 36 | |
| 37 | Expression* getChild(std::size_t i) const { |
| 38 | return args.at(n: i).get(); |
| 39 | } |
| 40 | |
| 41 | std::string getOperator() const override { return "coalesce"; } |
| 42 | private: |
| 43 | Args args; |
| 44 | }; |
| 45 | |
| 46 | } // namespace expression |
| 47 | } // namespace style |
| 48 | } // namespace mbgl |
| 49 |