[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/at.pass.cpp b/libcxx/test/std/containers/sequences/array/at.pass.cpp
index 27b326f..84a8d6f 100644
--- a/libcxx/test/std/containers/sequences/array/at.pass.cpp
+++ b/libcxx/test/std/containers/sequences/array/at.pass.cpp
@@ -56,6 +56,26 @@
catch (const std::out_of_range &) {}
#endif
}
+#ifndef TEST_HAS_NO_EXCEPTIONS
+ {
+ typedef double T;
+ typedef std::array<T, 0> C;
+ C c = {};
+ C const& cc = c;
+ try
+ {
+ TEST_IGNORE_NODISCARD c.at(0);
+ assert(false);
+ }
+ catch (const std::out_of_range &) {}
+ try
+ {
+ TEST_IGNORE_NODISCARD cc.at(0);
+ assert(false);
+ }
+ catch (const std::out_of_range &) {}
+ }
+#endif
{
typedef double T;
typedef std::array<T, 3> C;