xsimd 6.1.5 (new formula)

Closes #30902.

Signed-off-by: Dominyk Tiller <dominyktiller@gmail.com>

Formula/xsimd.rb

@@ -0,0 +1,45 @@
+class Xsimd < Formula
+  desc "Modern, portable C++ wrappers for SIMD intrinsics"
+  homepage "https://xsimd.readthedocs.io/en/latest/"
+  url "https://github.com/QuantStack/xsimd/archive/6.1.5.tar.gz"
+  sha256 "ecc781520f7b2bfdeb51d1385683694f2e89be1a05b77b222b9783cfeb645034"
+
+  depends_on "cmake" => :build
+
+  def install
+    args = std_cmake_args
+    args << "-DBUILD_TESTS=OFF"
+
+    system "cmake", ".", *args
+    system "make", "install"
+  end
+
+  test do
+    (testpath/"test.c").write <<~EOS
+      #include <vector>
+      #include <type_traits>
+
+      #include "xsimd/memory/xsimd_alignment.hpp"
+
+      using namespace xsimd;
+
+      struct mock_container {};
+
+      int main(void) {
+        using u_vector_type = std::vector<double>;
+        using a_vector_type = std::vector<double, aligned_allocator<double, XSIMD_DEFAULT_ALIGNMENT>>;
+
+        using u_vector_align = container_alignment_t<u_vector_type>;
+        using a_vector_align = container_alignment_t<a_vector_type>;
+        using mock_align = container_alignment_t<mock_container>;
+
+        if(!std::is_same<u_vector_align, unaligned_mode>::value) abort();
+        if(!std::is_same<a_vector_align, aligned_mode>::value) abort();
+        if(!std::is_same<mock_align, unaligned_mode>::value) abort();
+        return 0;
+      }
+    EOS
+    system ENV.cxx, "test.c", "-std=c++14", "-I#{include}", "-o", "test"
+    system "./test"
+  end
+end