[libcxx] [llvm] [libc++][math][c++17] P0226R1 - Mathematical Special Functions: infra + `std::assoc_laguerre` (PR #205649)

[Hristo Hristov via llvm-commits]

================
@@ -0,0 +1,33 @@
+//===----------------------------------------------------------------------===//
+//
+// 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
+//
+//===----------------------------------------------------------------------===//
+
+// REQUIRES: std-at-least-c++17
----------------
Zingam wrote:

Since there is a `nodiscard.verify.cpp` in the parent directory that includes all `<cmath>` stuff. I think it's better to reuse this file, instead of spreading the test cases all over the place. For `nodiscard` this is the usual convention that I have followed so far.

https://github.com/llvm/llvm-project/pull/205649