From 27b4cdd397486c0f196e8b1aad8df6c6d619531b Mon Sep 17 00:00:00 2001
From: ibis-hdl <83083329+ibis-hdl@users.noreply.github.com>
Date: Sun, 2 Feb 2025 15:48:03 +0100
Subject: [PATCH] Include <cstddef> in <boost/test/data/size.hpp>

If datasets are used, <boost/test/data/size.hpp> is also included, as can be seen in the [example](
    https://www.boost.org/doc/libs/1_87_0/libs/test/doc/html/boost_test/tests_organization/test_cases/test_case_generation/datasets.html#boost_test.tests_organization.test_cases.test_case_generation.datasets.dataset_interface.example_descr).
MSVC and Gcc indirectly have the definition of `std::size_t`, while Clang/LibC++
do not have this and a compiler error occurs. This fix will correct this.
---
 include/boost/test/data/size.hpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/include/boost/test/data/size.hpp b/include/boost/test/data/size.hpp
index 3e9ba96795..035bb2e56f 100644
--- a/include/boost/test/data/size.hpp
+++ b/include/boost/test/data/size.hpp
@@ -17,6 +17,7 @@
 
 // STL
 #include <iosfwd>
+#include <cstddef>
 
 #include <boost/test/detail/suppress_warnings.hpp>