add xbasic interpreter implementation

Signed-off-by: Avinal Kumar <avinal.xlvii@gmail.com>

include/xbasic/xbasic_interpreter.hpp

@@ -0,0 +1,40 @@
+#ifndef XBASIC_INTERPRETER_HPP_
+#define XBASIC_INTERPRETER_HPP_
+
+#include "basic/basic.hpp"
+#include "nlohmann/json.hpp"
+#include "xeus/xinterpreter.hpp"
+
+
+using xeus::xinterpreter;
+namespace nl = nlohmann;
+
+namespace xbasic {
+
+  class xbasic_interpreter : public xinterpreter {
+  private:
+    basic code_runner;
+  public:
+    xbasic_interpreter() = default;
+
+    virtual ~xbasic_interpreter() = default;
+
+    void configure_impl() override;
+
+    nl::json execute_request_impl(int execution_counter, const std::string& code, bool silent,
+                                  bool store_history, nl::json user_expressions,
+                                  bool allow_stdin) override;
+
+    nl::json complete_request_impl(const std::string& code, int cursor_pos) override;
+
+    nl::json inspect_request_impl(const std::string& code, int cursor_pos,
+                                  int detail_level) override;
+
+    nl::json is_complete_request_impl(const std::string& code) override;
+    nl::json kernel_info_request_impl() override;
+
+    void shutdown_request_impl() override;
+  };
+}  // namespace xbasic
+
+#endif  // XBASIC_INTERPRETER_HPP_