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PR libstdc++/83025 fix constraints for path overloads in <fstream> 

PR libstdc++/83025
	* include/std/fstream (basic_filebuf::_If_path): Move to
	namespace-scope and rename to _If_fs_path.
	(basic_filebuf::open): Use new name.
	(basic_ifstream(_Path, ios::openmode))
	(basic_ifstream::open(_Path, ios::openmode))
	(basic_ofstream(_Path, ios::openmode))
	(basic_ofstream::open(_Path, ios::openmode))
	(basic_fstream(_Path, ios::openmode))
	(basic_fstream::open(_Path, ios::openmode)): Use _If_fs_path.
	* testsuite/27_io/basic_filebuf/open/char/path.cc: Test with filename
	as non-const char*.
	* testsuite/27_io/basic_fstream/cons/char/path.cc: Likewise.
	* testsuite/27_io/basic_fstream/open/char/path.cc: Likewise.
	* testsuite/27_io/basic_ifstream/cons/char/path.cc: Likewise.
	* testsuite/27_io/basic_ifstream/open/char/path.cc: Likewise.
	* testsuite/27_io/basic_ofstream/cons/char/path.cc: Likewise.
	* testsuite/27_io/basic_ofstream/open/char/path.cc: Likewise.

From-SVN: r254871
This commit is contained in:
Jonathan Wakely 2017-11-17 14:07:58 +00:00 committed by Jonathan Wakely
parent 610f66a3d1
commit 96e0367ead
9 changed files with 91 additions and 26 deletions
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22
libstdc++-v3/ChangeLog
View File

@ -1,3 +1,25 @@
2017-11-17 Jonathan Wakely <jwakely@redhat.com>
PR libstdc++/83025
* include/std/fstream (basic_filebuf::_If_path): Move to
namespace-scope and rename to _If_fs_path.
(basic_filebuf::open): Use new name.
(basic_ifstream(_Path, ios::openmode))
(basic_ifstream::open(_Path, ios::openmode))
(basic_ofstream(_Path, ios::openmode))
(basic_ofstream::open(_Path, ios::openmode))
(basic_fstream(_Path, ios::openmode))
(basic_fstream::open(_Path, ios::openmode)): Use _If_fs_path.
* testsuite/27_io/basic_filebuf/open/char/path.cc: Test with filename
as non-const char*.
* testsuite/27_io/basic_fstream/cons/char/path.cc: Likewise.
* testsuite/27_io/basic_fstream/open/char/path.cc: Likewise.
* testsuite/27_io/basic_ifstream/cons/char/path.cc: Likewise.
* testsuite/27_io/basic_ifstream/open/char/path.cc: Likewise.
* testsuite/27_io/basic_ofstream/cons/char/path.cc: Likewise.
* testsuite/27_io/basic_ofstream/open/char/path.cc: Likewise.
2017-11-17 Marc Glisse <marc.glisse@inria.fr>
* include/bits/vector.tcc (vector::_M_realloc_insert): Cache old

34
libstdc++-v3/include/std/fstream
View File

@ -48,6 +48,14 @@ namespace std _GLIBCXX_VISIBILITY(default)
{
_GLIBCXX_BEGIN_NAMESPACE_VERSION
#if __cplusplus >= 201703L
// Enable if _Path is a filesystem::path or experimental::filesystem::path
template<typename _Path, typename _Result = _Path, typename _Path2
= decltype(std::declval<_Path&>().make_preferred().filename())>
using _If_fs_path = enable_if_t<is_same_v<_Path, _Path2>, _Result>;
#endif // C++17
// [27.8.1.1] template class basic_filebuf
/**
* @brief The actual work of input and output (for files).
@ -216,12 +224,6 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
}
}
#if __cplusplus >= 201703L
template<typename _Path, typename _Result = _Path, typename _Path2
= decltype(std::declval<_Path&>().make_preferred().native())>
using _If_path = enable_if_t<is_same_v<_Path, _Path2>, _Result>;
#endif // C++17
public:
// Constructors/destructor:
/**
@ -321,7 +323,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
* @return @c this on success, NULL on failure
*/
template<typename _Path>
_If_path<_Path, __filebuf_type*>
_If_fs_path<_Path, __filebuf_type*>
open(const _Path& __s, ios_base::openmode __mode)
{ return open(__s.c_str(), __mode); }
#endif // C++17
@ -540,8 +542,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
*
* @c ios_base::in is automatically included in @a __mode.
*/
template<typename _Path, typename = _Require<
is_constructible<__filebuf_type, const _Path&, ios_base::openmode>>>
template<typename _Path, typename _Require = _If_fs_path<_Path>>
basic_ifstream(const _Path& __s,
ios_base::openmode __mode = ios_base::in)
: basic_ifstream(__s.c_str(), __mode)
@ -661,9 +662,8 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
* fails, @c failbit is set in the stream's error state.
*/
template<typename _Path>
auto
_If_fs_path<_Path, void>
open(const _Path& __s, ios_base::openmode __mode = ios_base::in)
-> decltype((void)_M_filebuf.open(__s, __mode))
{ open(__s.c_str(), __mode); }
#endif // C++17
#endif // C++11
@ -768,8 +768,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
*
* @c ios_base::out is automatically included in @a __mode.
*/
template<typename _Path, typename = _Require<
is_constructible<__filebuf_type, const _Path&, ios_base::openmode>>>
template<typename _Path, typename _Require = _If_fs_path<_Path>>
basic_ofstream(const _Path& __s,
ios_base::openmode __mode = ios_base::out)
: basic_ofstream(__s.c_str(), __mode)
@ -889,9 +888,8 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
* function fails, @c failbit is set in the stream's error state.
*/
template<typename _Path>
auto
_If_fs_path<_Path, void>
open(const _Path& __s, ios_base::openmode __mode = ios_base::out)
-> decltype((void)_M_filebuf.open(__s, __mode))
{ open(__s.c_str(), __mode); }
#endif // C++17
#endif // C++11
@ -992,8 +990,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
* @param __s filesystem::path specifying the filename.
* @param __mode Open file in specified mode (see std::ios_base).
*/
template<typename _Path, typename = _Require<
is_constructible<__filebuf_type, const _Path&, ios_base::openmode>>>
template<typename _Path, typename _Require = _If_fs_path<_Path>>
basic_fstream(const _Path& __s,
ios_base::openmode __mode = ios_base::in | ios_base::out)
: basic_fstream(__s.c_str(), __mode)
@ -1115,10 +1112,9 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
* function fails, @c failbit is set in the stream's error state.
*/
template<typename _Path>
auto
_If_fs_path<_Path, void>
open(const _Path& __s,
ios_base::openmode __mode = ios_base::in | ios_base::out)
-> decltype((void)_M_filebuf.open(__s, __mode))
{ open(__s.c_str(), __mode); }
#endif // C++17
#endif // C++11

10
libstdc++-v3/testsuite/27_io/basic_filebuf/open/char/path.cc
View File

@ -24,7 +24,8 @@
#include <filesystem>
#include <testsuite_hooks.h>
const std::filesystem::path filename = "filebuf_members-1.tst";
char cstr[] = "filebuf_members-1.tst";
const std::filesystem::path filename = cstr;
void
test01()
@ -34,6 +35,13 @@ test01()
VERIFY( fb.is_open() );
}
void
test02() // compile-only
{
std::filebuf fb;
fb.open(cstr, std::ios::in); // PR libstdc++/83025
}
int
main()
{

6
libstdc++-v3/testsuite/27_io/basic_fstream/cons/char/path.cc
View File

@ -40,10 +40,14 @@ test02()
VERIFY( f.is_open() );
}
using std::is_constructible_v;
// PR libstdc++/83025
static_assert(is_constructible_v<std::fstream, char*>);
static_assert(is_constructible_v<std::fstream, char*, std::ios::openmode>);
int
main()
{
test01();
test02();
return 0;
}

11
libstdc++-v3/testsuite/27_io/basic_fstream/open/char/path.cc
View File

@ -24,7 +24,8 @@
#include <filesystem>
#include <testsuite_hooks.h>
const std::filesystem::path filename = "ofstream_members-1.tst";
char cstr[] = "filebuf_members-1.tst";
const std::filesystem::path filename = cstr;
void
test01()
@ -42,6 +43,14 @@ test02()
VERIFY( f.is_open() );
}
void
test03() // compile-only
{
std::fstream f;
f.open(cstr); // PR libstdc++/83025
f.open(cstr, std::ios::in|std::ios::out); // PR libstdc++/83025
}
int
main()
{

6
libstdc++-v3/testsuite/27_io/basic_ifstream/cons/char/path.cc
View File

@ -40,10 +40,14 @@ test02()
VERIFY( f.is_open() );
}
using std::is_constructible_v;
// PR libstdc++/83025
static_assert(is_constructible_v<std::fstream, char*>);
static_assert(is_constructible_v<std::fstream, char*, std::ios::openmode>);
int
main()
{
test01();
test02();
return 0;
}

11
libstdc++-v3/testsuite/27_io/basic_ifstream/open/char/path.cc
View File

@ -24,7 +24,8 @@
#include <filesystem>
#include <testsuite_hooks.h>
const std::filesystem::path filename = "ifstream_members-1.tst";
char cstr[] = "filebuf_members-1.tst";
const std::filesystem::path filename = cstr;
void
test01()
@ -42,6 +43,14 @@ test02()
VERIFY( f.is_open() );
}
void
test03() // compile-only
{
std::ifstream f;
f.open(cstr); // PR libstdc++/83025
f.open(cstr, std::ios::in); // PR libstdc++/83025
}
int
main()
{

5
libstdc++-v3/testsuite/27_io/basic_ofstream/cons/char/path.cc
View File

@ -40,6 +40,11 @@ test02()
VERIFY( f.is_open() );
}
using std::is_constructible_v;
// PR libstdc++/83025
static_assert(is_constructible_v<std::fstream, char*>);
static_assert(is_constructible_v<std::fstream, char*, std::ios::openmode>);
int
main()
{

12
libstdc++-v3/testsuite/27_io/basic_ofstream/open/char/path.cc
View File

@ -24,7 +24,8 @@
#include <filesystem>
#include <testsuite_hooks.h>
const std::filesystem::path filename = "ofstream_members-1.tst";
char cstr[] = "filebuf_members-1.tst";
const std::filesystem::path filename = cstr;
void
test01()
@ -42,10 +43,17 @@ test02()
VERIFY( f.is_open() );
}
void
test03() // compile-only
{
std::ofstream f;
f.open(cstr); // PR libstdc++/83025
f.open(cstr, std::ios::out); // PR libstdc++/83025
}
int
main()
{
test01();
test02();
return 0;
}