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 <vector>
9 
10 namespace mbgl {
11 namespace style {
12 namespace expression {
13 
14 class Assertion : public Expression  {
15 public:
16     Assertion(type::Type type_, std::vector<std::unique_ptr<Expression>> inputs_);
17 
18     static ParseResult parse(const mbgl::style::conversion::Convertible& value, ParsingContext& ctx);
19 
20     EvaluationResult evaluate(const EvaluationContext& params) const override;
21     void eachChild(const std::function<void(const Expression&)>& visit) const override;
22 
23     bool operator==(const Expression& e) const override;
24 
25     std::vector<optional<Value>> possibleOutputs() const override;
26 
27     std::string getOperator() const override;
28 
29 private:
30     std::vector<std::unique_ptr<Expression>> inputs;
31 };
32 
33 } // namespace expression
34 } // namespace style
35 } // namespace mbgl
36