UndefinedVariableError
======================

.. cpp:class:: pandas::UndefinedVariableError

   pandas C++ class.

Example
-------

.. code-block:: cpp

   #include <pandas/pandas.h>
   using namespace pandas;

   // Use UndefinedVariableError
   UndefinedVariableError obj;
   // ... operations ...

Constructors
------------

.. list-table::
   :widths: 55 25 20
   :header-rows: 1

   * - Signature
     - Location
     - Example
   * - ``explicit UndefinedVariableError(const std::string& msg) : std::runtime_error(msg)``
     - pd_exceptions.h:98
     - :ref:`View <example-undefinedvariableerror-undefinedvariableerror-0>`
   * - ``explicit UndefinedVariableError(const char\* msg) : std::runtime_error(msg)``
     - pd_exceptions.h:99
     - :ref:`View <example-undefinedvariableerror-undefinedvariableerror-1>`


Code Examples
-------------

The following examples are extracted from the test suite.

.. _example-undefinedvariableerror-undefinedvariableerror-0:

.. dropdown:: UndefinedVariableError (pd_test_5_all.cpp:72239)
   :class-title: example-dropdown

   .. code-block:: cpp
      :linenos:
      :lineno-start: 72229
      :emphasize-lines: 11

              pandas::error_messages::unsupported_op("+", "object"),
              local_fail);
      
          // Category 6: dtype — cannot cast.
          check_eq_str(
              "case_3.cat6_dtype.cannot_cast",
              "Cannot cast float64 to int64",
              pandas::error_messages::cannot_cast("float64", "int64"),
              local_fail);
      
          // Category 7: UndefinedVariableError (eval/query).
          check_eq_str(
              "case_3.cat7_UndefinedVariable.undefined_variable",
              "name 'x' is not defined",
              pandas::error_messages::undefined_variable("x"),
              local_fail);
      
          // Category 8: UnsortedIndexError — MultiIndex lexsort.
          check_eq_str(
              "case_3.cat8_UnsortedIndex.unsorted_index",
              "Key length (3) was greater than MultiIndex lexsort depth",

.. _example-undefinedvariableerror-undefinedvariableerror-1:

.. dropdown:: UndefinedVariableError (pd_test_5_all.cpp:72239)
   :class-title: example-dropdown

   .. code-block:: cpp
      :linenos:
      :lineno-start: 72229
      :emphasize-lines: 11

              pandas::error_messages::unsupported_op("+", "object"),
              local_fail);
      
          // Category 6: dtype — cannot cast.
          check_eq_str(
              "case_3.cat6_dtype.cannot_cast",
              "Cannot cast float64 to int64",
              pandas::error_messages::cannot_cast("float64", "int64"),
              local_fail);
      
          // Category 7: UndefinedVariableError (eval/query).
          check_eq_str(
              "case_3.cat7_UndefinedVariable.undefined_variable",
              "name 'x' is not defined",
              pandas::error_messages::undefined_variable("x"),
              local_fail);
      
          // Category 8: UnsortedIndexError — MultiIndex lexsort.
          check_eq_str(
              "case_3.cat8_UnsortedIndex.unsorted_index",
              "Key length (3) was greater than MultiIndex lexsort depth",