[libc++] Fix PR35491 - std::array of zero-size doesn't work with non-default constructible types.
Summary:
This patch fixes llvm.org/PR35491 and LWG2157 (https://cplusplus.github.io/LWG/issue2157)
The fix attempts to maintain ABI compatibility by replacing the array with a instance of `aligned_storage`.
Reviewers: mclow.lists, EricWF
Reviewed By: EricWF
Subscribers: lichray, cfe-commits
Differential Revision: https://reviews.llvm.org/D41223
llvm-svn: 324526
diff --git a/libcxx/test/std/containers/sequences/array/begin.pass.cpp b/libcxx/test/std/containers/sequences/array/begin.pass.cpp
index b12ffc8..282a947 100644
--- a/libcxx/test/std/containers/sequences/array/begin.pass.cpp
+++ b/libcxx/test/std/containers/sequences/array/begin.pass.cpp
@@ -18,6 +18,7 @@
// Disable the missing braces warning for this reason.
#include "disable_missing_braces_warning.h"
+
int main()
{
{
@@ -31,4 +32,13 @@
*i = 5.5;
assert(c[0] == 5.5);
}
+ {
+ struct NoDefault {
+ NoDefault(int) {}
+ };
+ typedef NoDefault T;
+ typedef std::array<T, 0> C;
+ C c = {};
+ assert(c.begin() == c.end());
+ }
}