[libc++] Move __clamp_to_integral to <cmath>, and harden against min()/max() macros

llvm-svn: 370900

1 files changed, 19 insertions, 0 deletions

diff --git a/libcxx/test/libcxx/numerics/c.math/undef_min_max.pass.cpp b/libcxx/test/libcxx/numerics/c.math/undef_min_max.pass.cpp
new file mode 100644
index 00000000000..ba1696eb240
--- /dev/null
+++ b/libcxx/test/libcxx/numerics/c.math/undef_min_max.pass.cpp
@@ -0,0 +1,19 @@
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#if defined(__GNUC__) || defined(__clang__)
+#pragma GCC diagnostic ignored "-W#warnings"
+#endif
+
+#define min THIS IS A NASTY MACRO!
+#define max THIS IS A NASTY MACRO!
+
+#include <cmath>
+
+#include "test_macros.h"
+
+int main(int, char**) { return 0; }