Method do_render

src/include/minja/minja.hpp:921–931

public:
    ExpressionNode(const Location & loc, std::shared_ptr<Expression> && e) : TemplateNode(loc), expr(std::move(e)) {}
    void do_render(std::ostringstream & out, const std::shared_ptr<Context> & context) const override {
      if (!expr) throw std::runtime_error("ExpressionNode.expr is null");
      auto result = expr->evaluate(context);
      if (result.is_string()) {
          out << result.get<std::string>();
      } else if (result.is_boolean()) {
          out << (result.get<bool>() ? "True" : "False");
      } else if (!result.is_null()) {
          out << result.dump();
      }
  }
};

class IfNode : public TemplateNode {