44 lines
1.2 KiB
C++
44 lines
1.2 KiB
C++
#pragma once
|
|
|
|
#include <mbgl/style/expression/expression.hpp>
|
|
#include <mbgl/style/expression/parsing_context.hpp>
|
|
#include <mbgl/style/conversion.hpp>
|
|
|
|
#include <memory>
|
|
#include <map>
|
|
|
|
namespace mbgl {
|
|
namespace style {
|
|
namespace expression {
|
|
|
|
class Coalesce : public Expression {
|
|
public:
|
|
using Args = std::vector<std::unique_ptr<Expression>>;
|
|
Coalesce(const type::Type& type_, Args args_)
|
|
: Expression(Kind::Coalesce, type_),
|
|
args(std::move(args_)) {}
|
|
|
|
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&)>& visit) const override;
|
|
|
|
bool operator==(const Expression& e) const override;
|
|
|
|
std::vector<std::optional<Value>> possibleOutputs() const override;
|
|
|
|
std::size_t getLength() const { return args.size(); }
|
|
|
|
Expression* getChild(std::size_t i) const { return args.at(i).get(); }
|
|
|
|
std::string getOperator() const override { return "coalesce"; }
|
|
|
|
private:
|
|
Args args;
|
|
};
|
|
|
|
} // namespace expression
|
|
} // namespace style
|
|
} // namespace mbgl
|