constexpr test ID*

Author: vinay-deshmukh

libcxx/test/support/min_allocator.h

@@ -194,7 +194,11 @@ class min_pointer<const void, ID> {
 
 template <class ID>
 class min_pointer<void, ID> {
+  #ifdef TEST_IS_CONSTANT_EVALUATED
+  ID* ptr_;
+  #else
   void* ptr_;
+  #endif
 
 public:
   min_pointer() TEST_NOEXCEPT = default;