fix test failures with older clang versions

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@337658 91177308-0d34-0410-b5e6-96231b3b80d8

test/std/experimental/filesystem/class.directory_entry/directory_entry.cons/default_const.pass.cpp

@@ -0,0 +1,32 @@
+//===----------------------------------------------------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is dual licensed under the MIT and the University of Illinois Open
+// Source Licenses. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+// UNSUPPORTED: c++98, c++03
+// XFAIL: apple-clang-7, clang-3.7, clang-3.8
+
+// <experimental/filesystem>
+
+// class directory_entry
+
+//          directory_entry() noexcept = default;
+
+#include "filesystem_include.hpp"
+#include <type_traits>
+#include <cassert>
+
+int main() {
+  using namespace fs;
+  // Default
+  {
+    static_assert(std::is_nothrow_default_constructible<directory_entry>::value,
+                  "directory_entry must have a nothrow default constructor");
+    const directory_entry e;
+    assert(e.path() == path());
+  }
+}

test/std/experimental/filesystem/class.directory_entry/directory_entry.obs/file_size.pass.cpp

@@ -30,7 +30,7 @@ TEST_SUITE(directory_entry_obs_testsuite)
 TEST_CASE(signatures) {
   using namespace fs;
   {
-    const fs::directory_entry e;
+    const fs::directory_entry e = {};
     std::error_code ec;
     static_assert(std::is_same<decltype(e.file_size()), uintmax_t>::value, "");
     static_assert(std::is_same<decltype(e.file_size(ec)), uintmax_t>::value,

test/std/experimental/filesystem/class.directory_entry/directory_entry.obs/file_type_obs.pass.cpp

@@ -32,7 +32,7 @@ TEST_CASE(file_dne) {
 
 TEST_CASE(signatures) {
   using namespace fs;
-  const directory_entry e;
+  const directory_entry e = {};
   std::error_code ec;
 #define TEST_FUNC(name)                                                        \
   static_assert(std::is_same<decltype(e.name()), bool>::value,                 \

test/std/experimental/filesystem/class.directory_entry/directory_entry.obs/hard_link_count.pass.cpp

@@ -28,7 +28,7 @@ TEST_SUITE(directory_entry_obs_testsuite)
 TEST_CASE(signatures) {
   using namespace fs;
   {
-    const fs::directory_entry e;
+    const directory_entry e = {};
     std::error_code ec;
     static_assert(std::is_same<decltype(e.hard_link_count()), uintmax_t>::value, "");
     static_assert(std::is_same<decltype(e.hard_link_count(ec)), uintmax_t>::value,

test/std/experimental/filesystem/class.directory_entry/directory_entry.obs/last_write_time.pass.cpp

@@ -28,7 +28,7 @@ TEST_SUITE(directory_entry_obs_testsuite)
 TEST_CASE(signatures) {
   using namespace fs;
   {
-    const fs::directory_entry e;
+    const fs::directory_entry e = {};
     std::error_code ec;
     static_assert(std::is_same<decltype(e.last_write_time()), file_time_type>::value,
                   "");