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PR libstdc++/91012 fixfilesystem_error::what() string

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When I refactored the filesystem_error code I changed it to only use the
constructor parameter in the what() string, instead of the string
returned by system_error::what(). That meant it no longer included the
description of the error_code that system_error adds. This restores the
previous behaivour, as encouraged by the standard ("Implementations
should include the system_error::what() string and the pathnames of
path1 and path2 in the native format in the returned string").

	PR libstdc++/91012
	* src/c++17/fs_path.cc (filesystem_error::_Impl): Use a string_view
	for the what_arg parameters.
	(filesystem_error::filesystem_error): Pass system_error::what() to
	the _Impl constructor.
	* testsuite/27_io/filesystem/filesystem_error/cons.cc: Ensure that
	filesystem_error::what() contains system_error::what().

From-SVN: r272739
This commit is contained in:
Jonathan Wakely 2019-06-27 10:42:39 +01:00 • committed by Jonathan Wakely
parent 4c4be718fb
commit e11c487111
3 changed files with 24 additions and 13 deletions
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10
libstdc++-v3/ChangeLog
View file

@ -1,3 +1,13 @@
2019-06-27 Jonathan Wakely <jwakely@redhat.com>
PR libstdc++/91012
* src/c++17/fs_path.cc (filesystem_error::_Impl): Use a string_view
for the what_arg parameters.
(filesystem_error::filesystem_error): Pass system_error::what() to
the _Impl constructor.
* testsuite/27_io/filesystem/filesystem_error/cons.cc: Ensure that
filesystem_error::what() contains system_error::what().
2019-06-26 Jonathan Wakely <jwakely@redhat.com>
* include/std/charconv (chars_format): Define bitmask type.

14
libstdc++-v3/src/c++17/fs_path.cc
View file

@ -1928,20 +1928,20 @@ fs::hash_value(const path& p) noexcept
struct fs::filesystem_error::_Impl
{
_Impl(const string& what_arg, const path& p1, const path& p2)
_Impl(string_view what_arg, const path& p1, const path& p2)
: path1(p1), path2(p2), what(make_what(what_arg, &p1, &p2))
{ }
_Impl(const string& what_arg, const path& p1)
_Impl(string_view what_arg, const path& p1)
: path1(p1), path2(), what(make_what(what_arg, &p1, nullptr))
{ }
_Impl(const string& what_arg)
_Impl(string_view what_arg)
: what(make_what(what_arg, nullptr, nullptr))
{ }
static std::string
make_what(const std::string& s, const path* p1, const path* p2)
make_what(string_view s, const path* p1, const path* p2)
{
const std::string pstr1 = p1 ? p1->u8string() : std::string{};
const std::string pstr2 = p2 ? p2->u8string() : std::string{};
@ -1977,20 +1977,20 @@ template class std::__shared_ptr<const fs::filesystem_error::_Impl>;
fs::filesystem_error::
filesystem_error(const string& what_arg, error_code ec)
: system_error(ec, what_arg),
_M_impl(std::__make_shared<_Impl>(what_arg))
_M_impl(std::__make_shared<_Impl>(system_error::what()))
{ }
fs::filesystem_error::
filesystem_error(const string& what_arg, const path& p1, error_code ec)
: system_error(ec, what_arg),
_M_impl(std::__make_shared<_Impl>(what_arg, p1))
_M_impl(std::__make_shared<_Impl>(system_error::what(), p1))
{ }
fs::filesystem_error::
filesystem_error(const string& what_arg, const path& p1, const path& p2,
error_code ec)
: system_error(ec, what_arg),
_M_impl(std::__make_shared<_Impl>(what_arg, p1, p2))
_M_impl(std::__make_shared<_Impl>(system_error::what(), p1, p2))
{ }
fs::filesystem_error::~filesystem_error() = default;

13
libstdc++-v3/testsuite/27_io/filesystem/filesystem_error/cons.cc
View file

@ -36,9 +36,10 @@ test01()
const std::error_code ec = make_error_code(std::errc::is_a_directory);
const std::filesystem::path p1 = "test/path/one";
const std::filesystem::path p2 = "/test/path/two";
std::system_error syserr(ec, str);
const filesystem_error e1(str, ec);
VERIFY( contains(e1.what(), str) );
VERIFY( contains(e1.what(), syserr.what()) );
VERIFY( !contains(e1.what(), "[]") ); // no "empty path" in the string
VERIFY( e1.path1().empty() );
VERIFY( e1.path2().empty() );
@ -47,7 +48,7 @@ test01()
const filesystem_error e2(str, p1, ec);
VERIFY( e2.path1() == p1 );
VERIFY( e2.path2().empty() );
VERIFY( contains(e2.what(), str) );
VERIFY( contains(e2.what(), syserr.what()) );
VERIFY( contains(e2.what(), p1.string()) );
VERIFY( !contains(e2.what(), "[]") );
VERIFY( e2.code() == ec );
@ -55,7 +56,7 @@ test01()
const filesystem_error e3(str, std::filesystem::path{}, ec);
VERIFY( e3.path1().empty() );
VERIFY( e3.path2().empty() );
VERIFY( contains(e3.what(), str) );
VERIFY( contains(e3.what(), syserr.what()) );
VERIFY( contains(e3.what(), "[]") );
VERIFY( !contains(e3.what(), "[] []") );
VERIFY( e3.code() == ec );
@ -63,7 +64,7 @@ test01()
const filesystem_error e4(str, p1, p2, ec);
VERIFY( e4.path1() == p1 );
VERIFY( e4.path2() == p2 );
VERIFY( contains(e4.what(), str) );
VERIFY( contains(e4.what(), syserr.what()) );
VERIFY( contains(e4.what(), p1.string()) );
VERIFY( contains(e4.what(), p2.string()) );
VERIFY( !contains(e4.what(), "[]") );
@ -72,7 +73,7 @@ test01()
const filesystem_error e5(str, p1, std::filesystem::path{}, ec);
VERIFY( e5.path1() == p1 );
VERIFY( e5.path2().empty() );
VERIFY( contains(e5.what(), str) );
VERIFY( contains(e5.what(), syserr.what()) );
VERIFY( contains(e5.what(), p1.string()) );
VERIFY( contains(e5.what(), "[]") );
VERIFY( e5.code() == ec );
@ -80,7 +81,7 @@ test01()
const filesystem_error e6(str, std::filesystem::path{}, p2, ec);
VERIFY( e6.path1().empty() );
VERIFY( e6.path2() == p2 );
VERIFY( contains(e6.what(), str) );
VERIFY( contains(e6.what(), syserr.what()) );
VERIFY( contains(e6.what(), "[]") );
VERIFY( contains(e6.what(), p2.string()) );
VERIFY( e6.code() == ec );