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[libc++] Apply _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION only in cl…
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…asses that we have instantiated externally

To make sure all member functions that require it are marked `_LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION` I compared the output of `objdump --syms lib/libc++.1.0.dylib` before and after, ignoring addresses.

Reviewed By: #libc, ldionne

Spies: Mordante, libcxx-commits, ldionne, arichardson, mstorsjo

Differential Revision: https://reviews.llvm.org/D150896
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@philnik777
philnik777 committed May 23, 2023
1 parent d91f65e commit b3c9150
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Showing 11 changed files with 281 additions and 214 deletions.
23 changes: 12 additions & 11 deletions libcxx/include/__config
View file
Expand Up @@ -594,7 +594,10 @@ typedef __char32_t char32_t;

# endif // defined(_LIBCPP_OBJECT_FORMAT_COFF)

# if __has_attribute(exclude_from_explicit_instantiation)
// _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION is used on member functions of explicitly instantiated
// classes that we don't want to make part of the ABI to opt those methods out of the explicit instantiation
// and avoid exporting them from the dylib or relying on their definition being in the dylib.
# if __has_attribute(__exclude_from_explicit_instantiation__)
# define _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION __attribute__((__exclude_from_explicit_instantiation__))
# else
// Try to approximate the effect of exclude_from_explicit_instantiation
Expand All @@ -620,9 +623,6 @@ typedef __char32_t char32_t;
// all functions or giving internal linkage to all functions. Both these (previous) solutions
// suffer from drawbacks that lead notably to code bloat.
//
// Note that we use _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION to ensure that we don't depend
// on _LIBCPP_HIDE_FROM_ABI methods of classes explicitly instantiated in the dynamic library.
//
// Also note that the _LIBCPP_HIDE_FROM_ABI_VIRTUAL macro should be used on virtual functions
// instead of _LIBCPP_HIDE_FROM_ABI. That macro does not use an ABI tag. Indeed, the mangled
// name of a virtual function is part of its ABI, since some architectures like arm64e can sign
Expand All @@ -637,25 +637,26 @@ typedef __char32_t char32_t;
// use compression mangling instead, see https://github.com/itanium-cxx-abi/cxx-abi/issues/70.
# ifndef _LIBCPP_NO_ABI_TAG
# define _LIBCPP_HIDE_FROM_ABI \
_LIBCPP_HIDDEN _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION \
__attribute__((__abi_tag__(_LIBCPP_TOSTRING(_LIBCPP_VERSIONED_IDENTIFIER))))
_LIBCPP_HIDDEN __attribute__((__abi_tag__(_LIBCPP_TOSTRING(_LIBCPP_VERSIONED_IDENTIFIER))))
# else
# define _LIBCPP_HIDE_FROM_ABI _LIBCPP_HIDDEN _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION
# define _LIBCPP_HIDE_FROM_ABI _LIBCPP_HIDDEN
# endif
# define _LIBCPP_HIDE_FROM_ABI_VIRTUAL _LIBCPP_HIDDEN _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION
# define _LIBCPP_HIDE_FROM_ABI_VIRTUAL _LIBCPP_HIDDEN

// This macro provides a HIDE_FROM_ABI equivalent that can be applied to extern
// "C" function, as those lack mangling.
# define _LIBCPP_HIDE_FROM_ABI_C _LIBCPP_HIDDEN _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION
# define _LIBCPP_HIDE_FROM_ABI_C _LIBCPP_HIDDEN

// _LIBCPP_HIDE_FROM_ABI_AFTER_V1 also avoids relying on the symbols in ABIv1. Functions marked with this macro are
// only preserved in the dylib to avoid ABI breaks.
# ifdef _LIBCPP_BUILDING_LIBRARY
# if _LIBCPP_ABI_VERSION > 1
# define _LIBCPP_HIDE_FROM_ABI_AFTER_V1 _LIBCPP_HIDE_FROM_ABI
# define _LIBCPP_HIDE_FROM_ABI_AFTER_V1 _LIBCPP_HIDE_FROM_ABI _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION
# else
# define _LIBCPP_HIDE_FROM_ABI_AFTER_V1
# endif
# else
# define _LIBCPP_HIDE_FROM_ABI_AFTER_V1 _LIBCPP_HIDE_FROM_ABI
# define _LIBCPP_HIDE_FROM_ABI_AFTER_V1 _LIBCPP_HIDE_FROM_ABI _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION
# endif

// Just so we can migrate to the new macros gradually.
Expand Down
12 changes: 6 additions & 6 deletions libcxx/include/__locale
View file
Expand Up @@ -212,11 +212,11 @@ public:
typedef _CharT char_type;
typedef basic_string<char_type> string_type;

_LIBCPP_INLINE_VISIBILITY
_LIBCPP_HIDE_FROM_ABI _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION
explicit collate(size_t __refs = 0)
: locale::facet(__refs) {}

_LIBCPP_INLINE_VISIBILITY
_LIBCPP_HIDE_FROM_ABI _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION
int compare(const char_type* __lo1, const char_type* __hi1,
const char_type* __lo2, const char_type* __hi2) const
{
Expand All @@ -225,14 +225,14 @@ public:

// FIXME(EricWF): The _LIBCPP_ALWAYS_INLINE is needed on Windows to work
// around a dllimport bug that expects an external instantiation.
_LIBCPP_INLINE_VISIBILITY
_LIBCPP_HIDE_FROM_ABI _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION
_LIBCPP_ALWAYS_INLINE
string_type transform(const char_type* __lo, const char_type* __hi) const
{
return do_transform(__lo, __hi);
}

_LIBCPP_INLINE_VISIBILITY
_LIBCPP_HIDE_FROM_ABI _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION
long hash(const char_type* __lo, const char_type* __hi) const
{
return do_hash(__lo, __hi);
Expand Down Expand Up @@ -1434,10 +1434,10 @@ class _LIBCPP_TEMPLATE_VIS codecvt_byname
: public codecvt<_InternT, _ExternT, _StateT>
{
public:
_LIBCPP_INLINE_VISIBILITY
_LIBCPP_HIDE_FROM_ABI _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION
explicit codecvt_byname(const char* __nm, size_t __refs = 0)
: codecvt<_InternT, _ExternT, _StateT>(__nm, __refs) {}
_LIBCPP_INLINE_VISIBILITY
_LIBCPP_HIDE_FROM_ABI _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION
explicit codecvt_byname(const string& __nm, size_t __refs = 0)
: codecvt<_InternT, _ExternT, _StateT>(__nm.c_str(), __refs) {}
protected:
Expand Down
64 changes: 32 additions & 32 deletions libcxx/include/fstream
View file
Expand Up @@ -231,31 +231,31 @@ public:
~basic_filebuf() override;

// 27.9.1.3 Assign/swap:
_LIBCPP_INLINE_VISIBILITY
_LIBCPP_HIDE_FROM_ABI _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION
basic_filebuf& operator=(basic_filebuf&& __rhs);
void swap(basic_filebuf& __rhs);

// 27.9.1.4 Members:
_LIBCPP_INLINE_VISIBILITY
_LIBCPP_HIDE_FROM_ABI _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION
bool is_open() const;
basic_filebuf* open(const char* __s, ios_base::openmode __mode);
#ifdef _LIBCPP_HAS_OPEN_WITH_WCHAR
basic_filebuf* open(const wchar_t* __s, ios_base::openmode __mode);
#endif
_LIBCPP_INLINE_VISIBILITY
_LIBCPP_HIDE_FROM_ABI _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION
basic_filebuf* open(const string& __s, ios_base::openmode __mode);

#if _LIBCPP_STD_VER >= 17 && !defined(_LIBCPP_HAS_NO_FILESYSTEM_LIBRARY)
_LIBCPP_AVAILABILITY_FILESYSTEM _LIBCPP_INLINE_VISIBILITY
_LIBCPP_AVAILABILITY_FILESYSTEM _LIBCPP_HIDE_FROM_ABI _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION
basic_filebuf* open(const _VSTD_FS::path& __p, ios_base::openmode __mode) {
return open(__p.c_str(), __mode);
}
#endif
_LIBCPP_INLINE_VISIBILITY
_LIBCPP_HIDE_FROM_ABI _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION
basic_filebuf* __open(int __fd, ios_base::openmode __mode);
basic_filebuf* close();

_LIBCPP_INLINE_VISIBILITY
_LIBCPP_HIDE_FROM_ABI _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION
inline static const char*
__make_mdstring(ios_base::openmode __mode) _NOEXCEPT;

Expand Down Expand Up @@ -1158,48 +1158,48 @@ public:
typedef typename traits_type::pos_type pos_type;
typedef typename traits_type::off_type off_type;

_LIBCPP_INLINE_VISIBILITY
_LIBCPP_HIDE_FROM_ABI _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION
basic_ifstream();
_LIBCPP_INLINE_VISIBILITY
_LIBCPP_HIDE_FROM_ABI _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION
explicit basic_ifstream(const char* __s, ios_base::openmode __mode = ios_base::in);
#ifdef _LIBCPP_HAS_OPEN_WITH_WCHAR
_LIBCPP_INLINE_VISIBILITY
_LIBCPP_HIDE_FROM_ABI _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION
explicit basic_ifstream(const wchar_t* __s, ios_base::openmode __mode = ios_base::in);
#endif
_LIBCPP_INLINE_VISIBILITY
_LIBCPP_HIDE_FROM_ABI _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION
explicit basic_ifstream(const string& __s, ios_base::openmode __mode = ios_base::in);
#if _LIBCPP_STD_VER >= 17 && !defined(_LIBCPP_HAS_NO_FILESYSTEM_LIBRARY)
_LIBCPP_AVAILABILITY_FILESYSTEM _LIBCPP_INLINE_VISIBILITY
_LIBCPP_AVAILABILITY_FILESYSTEM _LIBCPP_HIDE_FROM_ABI _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION
explicit basic_ifstream(const filesystem::path& __p, ios_base::openmode __mode = ios_base::in)
: basic_ifstream(__p.c_str(), __mode) {}
#endif // _LIBCPP_STD_VER >= 17
_LIBCPP_INLINE_VISIBILITY
_LIBCPP_HIDE_FROM_ABI _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION
basic_ifstream(basic_ifstream&& __rhs);
_LIBCPP_INLINE_VISIBILITY
_LIBCPP_HIDE_FROM_ABI _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION
basic_ifstream& operator=(basic_ifstream&& __rhs);
_LIBCPP_INLINE_VISIBILITY
_LIBCPP_HIDE_FROM_ABI _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION
void swap(basic_ifstream& __rhs);

_LIBCPP_INLINE_VISIBILITY
_LIBCPP_HIDE_FROM_ABI _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION
basic_filebuf<char_type, traits_type>* rdbuf() const;
_LIBCPP_INLINE_VISIBILITY
_LIBCPP_HIDE_FROM_ABI _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION
bool is_open() const;
void open(const char* __s, ios_base::openmode __mode = ios_base::in);
#ifdef _LIBCPP_HAS_OPEN_WITH_WCHAR
void open(const wchar_t* __s, ios_base::openmode __mode = ios_base::in);
#endif
void open(const string& __s, ios_base::openmode __mode = ios_base::in);
#if _LIBCPP_STD_VER >= 17 && !defined(_LIBCPP_HAS_NO_FILESYSTEM_LIBRARY)
_LIBCPP_AVAILABILITY_FILESYSTEM _LIBCPP_INLINE_VISIBILITY
_LIBCPP_AVAILABILITY_FILESYSTEM _LIBCPP_HIDE_FROM_ABI _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION
void open(const filesystem::path& __p,
ios_base::openmode __mode = ios_base::in) {
return open(__p.c_str(), __mode);
}
#endif // _LIBCPP_STD_VER >= 17

_LIBCPP_INLINE_VISIBILITY
_LIBCPP_HIDE_FROM_ABI _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION
void __open(int __fd, ios_base::openmode __mode);
_LIBCPP_INLINE_VISIBILITY
_LIBCPP_HIDE_FROM_ABI _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION
void close();

private:
Expand Down Expand Up @@ -1358,33 +1358,33 @@ public:
typedef typename traits_type::pos_type pos_type;
typedef typename traits_type::off_type off_type;

_LIBCPP_INLINE_VISIBILITY
_LIBCPP_HIDE_FROM_ABI _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION
basic_ofstream();
_LIBCPP_INLINE_VISIBILITY
_LIBCPP_HIDE_FROM_ABI _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION
explicit basic_ofstream(const char* __s, ios_base::openmode __mode = ios_base::out);
#ifdef _LIBCPP_HAS_OPEN_WITH_WCHAR
_LIBCPP_INLINE_VISIBILITY
_LIBCPP_HIDE_FROM_ABI _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION
explicit basic_ofstream(const wchar_t* __s, ios_base::openmode __mode = ios_base::out);
#endif
_LIBCPP_INLINE_VISIBILITY
_LIBCPP_HIDE_FROM_ABI _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION
explicit basic_ofstream(const string& __s, ios_base::openmode __mode = ios_base::out);

#if _LIBCPP_STD_VER >= 17 && !defined(_LIBCPP_HAS_NO_FILESYSTEM_LIBRARY)
_LIBCPP_AVAILABILITY_FILESYSTEM _LIBCPP_INLINE_VISIBILITY
_LIBCPP_AVAILABILITY_FILESYSTEM _LIBCPP_HIDE_FROM_ABI _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION
explicit basic_ofstream(const filesystem::path& __p, ios_base::openmode __mode = ios_base::out)
: basic_ofstream(__p.c_str(), __mode) {}
#endif // _LIBCPP_STD_VER >= 17

_LIBCPP_INLINE_VISIBILITY
_LIBCPP_HIDE_FROM_ABI _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION
basic_ofstream(basic_ofstream&& __rhs);
_LIBCPP_INLINE_VISIBILITY
_LIBCPP_HIDE_FROM_ABI _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION
basic_ofstream& operator=(basic_ofstream&& __rhs);
_LIBCPP_INLINE_VISIBILITY
_LIBCPP_HIDE_FROM_ABI _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION
void swap(basic_ofstream& __rhs);

_LIBCPP_INLINE_VISIBILITY
_LIBCPP_HIDE_FROM_ABI _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION
basic_filebuf<char_type, traits_type>* rdbuf() const;
_LIBCPP_INLINE_VISIBILITY
_LIBCPP_HIDE_FROM_ABI _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION
bool is_open() const;
void open(const char* __s, ios_base::openmode __mode = ios_base::out);
#ifdef _LIBCPP_HAS_OPEN_WITH_WCHAR
Expand All @@ -1393,14 +1393,14 @@ public:
void open(const string& __s, ios_base::openmode __mode = ios_base::out);

#if _LIBCPP_STD_VER >= 17 && !defined(_LIBCPP_HAS_NO_FILESYSTEM_LIBRARY)
_LIBCPP_AVAILABILITY_FILESYSTEM _LIBCPP_INLINE_VISIBILITY
_LIBCPP_AVAILABILITY_FILESYSTEM _LIBCPP_HIDE_FROM_ABI _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION
void open(const filesystem::path& __p, ios_base::openmode __mode = ios_base::out)
{ return open(__p.c_str(), __mode); }
#endif // _LIBCPP_STD_VER >= 17

_LIBCPP_INLINE_VISIBILITY
_LIBCPP_HIDE_FROM_ABI _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION
void __open(int __fd, ios_base::openmode __mode);
_LIBCPP_INLINE_VISIBILITY
_LIBCPP_HIDE_FROM_ABI _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION
void close();

private:
Expand Down
71 changes: 43 additions & 28 deletions libcxx/include/ios
View file
Expand Up @@ -625,70 +625,85 @@ public:
#ifdef _LIBCPP_CXX03_LANG
// Preserve the ability to compare with literal 0,
// and implicitly convert to bool, but not implicitly convert to int.
_LIBCPP_INLINE_VISIBILITY
_LIBCPP_HIDE_FROM_ABI _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION
operator void*() const {return fail() ? nullptr : (void*)this;}
#else
_LIBCPP_INLINE_VISIBILITY
_LIBCPP_HIDE_FROM_ABI _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION
explicit operator bool() const {return !fail();}
#endif

_LIBCPP_INLINE_VISIBILITY bool operator!() const {return fail();}
_LIBCPP_INLINE_VISIBILITY iostate rdstate() const {return ios_base::rdstate();}
_LIBCPP_INLINE_VISIBILITY void clear(iostate __state = goodbit) {ios_base::clear(__state);}
_LIBCPP_INLINE_VISIBILITY void setstate(iostate __state) {ios_base::setstate(__state);}
_LIBCPP_INLINE_VISIBILITY bool good() const {return ios_base::good();}
_LIBCPP_INLINE_VISIBILITY bool eof() const {return ios_base::eof();}
_LIBCPP_INLINE_VISIBILITY bool fail() const {return ios_base::fail();}
_LIBCPP_INLINE_VISIBILITY bool bad() const {return ios_base::bad();}
_LIBCPP_HIDE_FROM_ABI _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION bool operator!() const { return fail(); }

_LIBCPP_HIDE_FROM_ABI _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION iostate rdstate() const {
return ios_base::rdstate();
}

_LIBCPP_HIDE_FROM_ABI _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION void clear(iostate __state = goodbit) {
ios_base::clear(__state);
}

_LIBCPP_HIDE_FROM_ABI _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION void setstate(iostate __state) {
ios_base::setstate(__state);
}

_LIBCPP_HIDE_FROM_ABI _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION bool good() const { return ios_base::good(); }
_LIBCPP_HIDE_FROM_ABI _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION bool eof() const { return ios_base::eof(); }
_LIBCPP_HIDE_FROM_ABI _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION bool fail() const { return ios_base::fail(); }
_LIBCPP_HIDE_FROM_ABI _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION bool bad() const { return ios_base::bad(); }

_LIBCPP_INLINE_VISIBILITY iostate exceptions() const {return ios_base::exceptions();}
_LIBCPP_INLINE_VISIBILITY void exceptions(iostate __iostate) {ios_base::exceptions(__iostate);}
_LIBCPP_HIDE_FROM_ABI _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION iostate exceptions() const {
return ios_base::exceptions();
}

_LIBCPP_HIDE_FROM_ABI _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION void exceptions(iostate __iostate) {
ios_base::exceptions(__iostate);
}

// 27.5.4.1 Constructor/destructor:
_LIBCPP_INLINE_VISIBILITY
_LIBCPP_HIDE_FROM_ABI _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION
explicit basic_ios(basic_streambuf<char_type,traits_type>* __sb);
~basic_ios() override;

// 27.5.4.2 Members:
_LIBCPP_INLINE_VISIBILITY
_LIBCPP_HIDE_FROM_ABI _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION
basic_ostream<char_type, traits_type>* tie() const;
_LIBCPP_INLINE_VISIBILITY
_LIBCPP_HIDE_FROM_ABI _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION
basic_ostream<char_type, traits_type>* tie(basic_ostream<char_type, traits_type>* __tiestr);

_LIBCPP_INLINE_VISIBILITY
_LIBCPP_HIDE_FROM_ABI _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION
basic_streambuf<char_type, traits_type>* rdbuf() const;
_LIBCPP_INLINE_VISIBILITY
_LIBCPP_HIDE_FROM_ABI _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION
basic_streambuf<char_type, traits_type>* rdbuf(basic_streambuf<char_type, traits_type>* __sb);

basic_ios& copyfmt(const basic_ios& __rhs);

_LIBCPP_INLINE_VISIBILITY
_LIBCPP_HIDE_FROM_ABI _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION
char_type fill() const;
_LIBCPP_INLINE_VISIBILITY
_LIBCPP_HIDE_FROM_ABI _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION
char_type fill(char_type __ch);

_LIBCPP_INLINE_VISIBILITY
_LIBCPP_HIDE_FROM_ABI _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION
locale imbue(const locale& __loc);

_LIBCPP_INLINE_VISIBILITY
_LIBCPP_HIDE_FROM_ABI _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION
char narrow(char_type __c, char __dfault) const;
_LIBCPP_INLINE_VISIBILITY
_LIBCPP_HIDE_FROM_ABI _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION
char_type widen(char __c) const;

protected:
_LIBCPP_INLINE_VISIBILITY
_LIBCPP_HIDE_FROM_ABI _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION
basic_ios() {// purposefully does no initialization
}
_LIBCPP_INLINE_VISIBILITY
_LIBCPP_HIDE_FROM_ABI _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION
void init(basic_streambuf<char_type, traits_type>* __sb);

_LIBCPP_INLINE_VISIBILITY
_LIBCPP_HIDE_FROM_ABI _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION
void move(basic_ios& __rhs);
_LIBCPP_INLINE_VISIBILITY
_LIBCPP_HIDE_FROM_ABI _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION
void move(basic_ios&& __rhs) {move(__rhs);}
_LIBCPP_INLINE_VISIBILITY
_LIBCPP_HIDE_FROM_ABI _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION
void swap(basic_ios& __rhs) _NOEXCEPT;
_LIBCPP_INLINE_VISIBILITY
_LIBCPP_HIDE_FROM_ABI _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION
void set_rdbuf(basic_streambuf<char_type, traits_type>* __sb);
private:
basic_ostream<char_type, traits_type>* __tie_;
Expand Down

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