[Interop][SwiftToCxx] Moving the max function to _impl namespace and assigning swift-expected-execution.cpp as unsupported by Windows.

Author: Robertorosmaninho

lib/PrintAsClang/_SwiftCxxInteroperability.h

@@ -199,6 +199,8 @@ constexpr static std::size_t max(std::size_t a, std::size_t b) {
   return a > b ? a : b;
 }
 
+} // namespace _impl
+
 /// The Expected class has either an error or an value.
 template<class T>
 class Expected {
@@ -302,7 +304,7 @@ class Expected {
   constexpr bool has_value() const noexcept { return has_val; }
 
 private:
-  alignas(max(alignof(T), alignof(swift::Error))) char buffer[max(sizeof(T), sizeof(swift::Error))];
+  alignas(_impl::max(alignof(T), alignof(swift::Error))) char buffer[_impl::max(sizeof(T), sizeof(swift::Error))];
   bool has_val;
 };
 

test/Interop/SwiftToCxx/functions/swift-expected-execution.cpp

@@ -9,6 +9,7 @@
 // RUN: %target-run %t/swift-expected-execution | %FileCheck %s
 
 // REQUIRES: executable_test
+// UNSUPPORTED: OS=windows-msvc
 
 #include <cstdio>
 #include "functions.h"