Add a test

Author: aelovikov-intel

sycl/test-e2e/Complex/sycl_complex_include_order.cpp

@@ -0,0 +1,44 @@
+// RUN: %{build} -DINCLUDE_BEFORE -o %t.out
+// RUN: %{run} %t.out
+// RUN: %{build} -o %t.out
+// RUN: %{run} %t.out
+
+// Test scenario when <complex> is included before SYCL headers.
+#ifdef INCLUDE_BEFORE
+#include <complex>
+#endif
+
+#include <sycl/sycl.hpp>
+
+#ifndef INCLUDE_BEFORE
+#include <complex>
+#endif
+
+using namespace sycl;
+
+int main() {
+  queue q;
+  auto test = []() {
+    static_assert(sycl::detail::is_complex<std::complex<float>>::value);
+    static_assert(sycl::detail::isComplex<std::complex<float>>::value);
+#ifdef __SYCL_DEVICE_ONLY__
+    static_assert(
+        std::is_same_v<sycl::detail::GroupOpTag<std::complex<float>>::type,
+                       sycl::detail::GroupOpC>);
+#endif
+    static_assert(
+        std::is_same_v<
+            sycl::detail::select_cl_scalar_complex_or_T_t<std::complex<float>>,
+            __spv::complex_float>);
+    static_assert(
+        std::is_same_v<sycl::detail::select_cl_scalar_complex_or_T_t<float>,
+                       float>);
+  };
+  test();
+  q.single_task([=] {
+     test();
+     std::ignore = std::complex<float>{0.0f, 1.0f};
+   }).wait();
+
+  return 0;
+}