Add standalone testing to bezier polynomials (#658)

include/boost/math/interpolators/detail/bezier_polynomial_detail.hpp

@@ -6,9 +6,11 @@
 
 #ifndef BOOST_MATH_INTERPOLATORS_BEZIER_POLYNOMIAL_DETAIL_HPP
 #define BOOST_MATH_INTERPOLATORS_BEZIER_POLYNOMIAL_DETAIL_HPP
+
 #include <stdexcept>
 #include <iostream>
 #include <string>
+#include <limits>
 
 namespace boost::math::interpolators::detail {
 

test/bezier_polynomial_test.cpp

@@ -4,6 +4,8 @@
  * Boost Software License, Version 1.0. (See accompanying file
  * LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
  */
+
+#include <boost/math/tools/config.hpp>
 #ifndef BOOST_MATH_NO_THREAD_LOCAL_WITH_NON_TRIVIAL_TYPES
 #include "math_unit_test.hpp"
 #include <numeric>

test/compile_test/interpolators_bezier_polynomial_incl_test.cpp

@@ -0,0 +1,26 @@
+//  Copyright Matt Borland 2021.
+//  Use, modification and distribution are subject to the
+//  Boost Software License, Version 1.0. (See accompanying file
+//  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+//
+// A sanity check that this file
+// #includes all the files that it needs to.
+//
+#include <boost/math/interpolators/bezier_polynomial.hpp>
+//
+// Note this header includes no other headers, this is
+// important if this test is to be meaningful:
+//
+#include "test_compile_result.hpp"
+//
+// This test includes <vector> becasue many of the interpolators are not compatible with pointers/c-style arrays
+//
+#include <vector>
+
+void compile_and_link_test()
+{
+   std::vector<std::vector<double>> control_points {{0.0, 0.0}, {1.0, 1.0}};
+   auto bp = boost::math::interpolators::bezier_polynomial(std::move(control_points));
+
+   check_result<double>(bp(0)[0]);
+}