LineageOS/android_external_libcxx
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Implement LWG 2672.

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git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@284314 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Eric Fiselier
2016-10-15 23:05:04 +00:00
parent 620a9a5ecf
commit 25dc5bdb88
3 changed files with 48 additions and 7 deletions
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22
src/experimental/filesystem/operations.cpp
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@@ -472,13 +472,25 @@ bool __fs_is_empty(const path& p, std::error_code *ec)
std::error_code m_ec;
struct ::stat pst;
auto st = detail::posix_stat(p, pst, &m_ec);
if (is_directory(st))
return directory_iterator(p) == directory_iterator{};
if (m_ec) {
set_or_throw(m_ec, ec, "is_empty", p);
return false;
}
else if (!is_directory(st) && !is_regular_file(st)) {
m_ec = make_error_code(errc::not_supported);
set_or_throw(m_ec, ec, "is_empty");
return false;
}
else if (is_directory(st)) {
auto it = ec ? directory_iterator(p, *ec) : directory_iterator(p);
if (ec && *ec)
return false;
return it == directory_iterator{};
}
else if (is_regular_file(st))
return static_cast<std::uintmax_t>(pst.st_size) == 0;
// else
set_or_throw(m_ec, ec, "is_empty", p);
return false;
_LIBCPP_UNREACHABLE();
}