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