test: add test for std::pair

Author: jcarpent

unittest/CMakeLists.txt

@@ -39,6 +39,7 @@ if(NOT NUMPY_WITH_BROKEN_UFUNC_SUPPORT)
 endif()
 add_lib_unit_test(std_vector)
 add_lib_unit_test(std_array)
+add_lib_unit_test(std_pair)
 add_lib_unit_test(user_struct)
 
 function(config_bind_optional tagname opttype)
@@ -115,6 +116,10 @@ add_python_unit_test("py-std-array" "unittest/python/test_std_array.py"
                      "python;unittest")
 set_tests_properties("py-std-array" PROPERTIES DEPENDS ${PYWRAP})
 
+add_python_unit_test("py-std-pair" "unittest/python/test_std_pair.py"
+                     "python;unittest")
+set_tests_properties("py-std-pair" PROPERTIES DEPENDS ${PYWRAP})
+
 add_python_unit_test("py-user-struct" "unittest/python/test_user_struct.py"
                      "python;unittest")
 set_tests_properties("py-user-struct" PROPERTIES DEPENDS ${PYWRAP})

unittest/python/test_std_pair.py

@@ -0,0 +1,4 @@
+from std_pair import std_pair_to_tuple
+
+t = (1, 2.0)
+assert std_pair_to_tuple(t) == t

unittest/std_pair.cpp

@@ -0,0 +1,24 @@
+/// @file
+/// @copyright Copyright 2023 CNRS INRIA
+
+#include <eigenpy/eigenpy.hpp>
+#include <eigenpy/std-pair.hpp>
+#include <iostream>
+
+namespace bp = boost::python;
+
+template <typename T1, typename T2>
+bp::tuple std_pair_to_tuple(const std::pair<T1, T2>& pair) {
+  return bp::make_tuple(pair.first, pair.second);
+}
+
+BOOST_PYTHON_MODULE(std_pair) {
+  using namespace eigenpy;
+
+  enableEigenPy();
+
+  typedef std::pair<int, double> PairType;
+  StdPairConverter<PairType>::registration();
+
+  bp::def("std_pair_to_tuple", std_pair_to_tuple<int, double>);
+}