NA_t
====

.. cpp:class:: numpy::NA_t

   numpy C++ class.

Example
-------

.. code-block:: cpp

   #include <numpy/np_ndarray.h>
   using namespace numpy;

   // Use NA_t
   NA_t obj;
   // ... operations ...

Other Methods
-------------

.. list-table::
   :widths: 40 20 15 25
   :header-rows: 1

   * - Signature
     - Return Type
     - Location
     - Example
   * - ``explicit constexpr operator bool() const noexcept``
     - explicit constexpr operator
     - df_na.h:49
     - :ref:`View <example-na_t-bool-0>`
   * - ``std::string repr() const``
     - constexpr bool operator>=(const T&) const noexcept { return false; } std::string
     - df_na.h:46
     - 


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

The following examples are extracted from the test suite.

.. _example-na_t-bool-0:

.. dropdown:: bool (np_test_4_all.cpp:1540)
   :class-title: example-dropdown

   .. code-block:: cpp
      :linenos:
      :lineno-start: 1530
      :emphasize-lines: 11

            // std::cout << "  modf(uint64_t(100)) = (" << frac << ", " << integ << ") ✓\n";
          }
      
          void test_scalar_bool() {
            std::cout << "Testing modf(bool_)...\n";
      
            numpy::bool_ val_true = true;
            auto [frac1, integ1] = numpy::modf(val_true);
      
            static_assert(std::is_same_v<decltype(frac1), double>, "bool_ should return double");
            if (!(approx_equal(frac1, 0.0) && "bool(true) fractional part should be 0.0")) {
                std::string description = std::string("test_scalar_bool():") + __FILE__ + ":" + std::to_string(__LINE__) + ": !(approx_equal(frac1, 0.0) && \"bool(true) fractional part should be 0.0\")";
                std::cout << std::string("[FAIL] ") + description << std::endl;
                throw std::runtime_error(description);
            }
            if (!(approx_equal(integ1, 1.0) && "bool(true) integer part should be 1.0")) {
                std::string description = std::string("test_scalar_bool():") + __FILE__ + ":" + std::to_string(__LINE__) + ": !(approx_equal(integ1, 1.0) && \"bool(true) integer part should be 1.0\")";
                std::cout << std::string("[FAIL] ") + description << std::endl;
                throw std::runtime_error(description);
            }