85 lines
2.6 KiB
C++
85 lines
2.6 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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#include <optional>
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namespace mbgl {
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namespace style {
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namespace expression {
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class Let : public Expression {
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public:
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using Bindings = std::map<std::string, std::shared_ptr<Expression>>;
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Let(Bindings bindings_, std::unique_ptr<Expression> result_)
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: Expression(
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Kind::Let, result_->getType(), collectDependencies(bindings_) | depsOf(result_) | Dependency::Bind),
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bindings(std::move(bindings_)),
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result(std::move(result_)) {}
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static ParseResult parse(const mbgl::style::conversion::Convertible&, ParsingContext&);
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EvaluationResult evaluate(const EvaluationContext& params) const override;
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void eachChild(const std::function<void(const Expression&)>&) const override;
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bool operator==(const Expression& e) const noexcept override {
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if (e.getKind() == Kind::Let) {
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const auto* rhs = static_cast<const Let*>(&e);
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return *result == *(rhs->result);
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}
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return false;
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}
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std::vector<std::optional<Value>> possibleOutputs() const override;
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Expression* getResult() const noexcept { return result.get(); }
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mbgl::Value serialize() const override;
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std::string getOperator() const override { return "let"; }
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private:
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Bindings bindings;
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std::unique_ptr<Expression> result;
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};
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class Var : public Expression {
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public:
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Var(std::string name_, std::shared_ptr<Expression> value_)
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: Expression(Kind::Var, value_->getType(), depsOf(value_) | Dependency::Var),
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name(std::move(name_)),
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value(std::move(value_)) {}
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static ParseResult parse(const mbgl::style::conversion::Convertible&, ParsingContext&);
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EvaluationResult evaluate(const EvaluationContext& params) const override;
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void eachChild(const std::function<void(const Expression&)>&) const override;
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bool operator==(const Expression& e) const noexcept override {
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if (e.getKind() == Kind::Var) {
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auto rhs = static_cast<const Var*>(&e);
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return *value == *(rhs->value);
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}
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return false;
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}
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std::vector<std::optional<Value>> possibleOutputs() const override;
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mbgl::Value serialize() const override;
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std::string getOperator() const override { return "var"; }
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const std::shared_ptr<Expression>& getBoundExpression() const noexcept { return value; }
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private:
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std::string name;
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std::shared_ptr<Expression> value;
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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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