Restoring authorship annotation for Mikhail Borisov <borisov.mikhail@gmail.com>. Commit 1 of 2.

1 files changed, 182 insertions, 182 deletions

diff --git a/contrib/libs/cxxsupp/libcxx/include/istream b/contrib/libs/cxxsupp/libcxx/include/istream
index 6fb296f820..bf8c066dc6 100644
--- a/contrib/libs/cxxsupp/libcxx/include/istream
+++ b/contrib/libs/cxxsupp/libcxx/include/istream
@@ -359,16 +359,16 @@ __input_arithmetic(basic_istream<_CharT, _Traits>& __is, _Tp& __n) {
     if (__s)
     {
 #ifndef _LIBCPP_NO_EXCEPTIONS
-        try
-        {
+        try 
+        { 
 #endif // _LIBCPP_NO_EXCEPTIONS
             typedef istreambuf_iterator<_CharT, _Traits> _Ip;
             typedef num_get<_CharT, _Ip> _Fp;
             use_facet<_Fp>(__is.getloc()).get(_Ip(__is), _Ip(), __is, __state, __n);
 #ifndef _LIBCPP_NO_EXCEPTIONS
-        }
-        catch (...)
-        {
+        } 
+        catch (...) 
+        { 
             __state |= ios_base::badbit;
             __is.__setstate_nothrow(__state);
             if (__is.exceptions() & ios_base::badbit)
@@ -468,8 +468,8 @@ __input_arithmetic_with_numeric_limits(basic_istream<_CharT, _Traits>& __is, _Tp
     if (__s)
     {
 #ifndef _LIBCPP_NO_EXCEPTIONS
-        try
-        {
+        try 
+        { 
 #endif // _LIBCPP_NO_EXCEPTIONS
             typedef istreambuf_iterator<_CharT, _Traits> _Ip;
             typedef num_get<_CharT, _Ip> _Fp;
@@ -488,18 +488,18 @@ __input_arithmetic_with_numeric_limits(basic_istream<_CharT, _Traits>& __is, _Tp
             else
             {
                 __n = static_cast<_Tp>(__temp);
-            }
-#ifndef _LIBCPP_NO_EXCEPTIONS
+            } 
+#ifndef _LIBCPP_NO_EXCEPTIONS 
         }
-        catch (...)
-        {
+        catch (...) 
+        { 
             __state |= ios_base::badbit;
             __is.__setstate_nothrow(__state);
             if (__is.exceptions() & ios_base::badbit)
             {
                 throw;
             }
-        }
+        } 
 #endif // _LIBCPP_NO_EXCEPTIONS
         __is.setstate(__state);
     }
@@ -526,9 +526,9 @@ basic_istream<_CharT, _Traits>&
 __input_c_string(basic_istream<_CharT, _Traits>& __is, _CharT* __p, size_t __n)
 {
     ios_base::iostate __state = ios_base::goodbit;
-    typename basic_istream<_CharT, _Traits>::sentry __sen(__is);
-    if (__sen)
-    {
+    typename basic_istream<_CharT, _Traits>::sentry __sen(__is); 
+    if (__sen) 
+    { 
 #ifndef _LIBCPP_NO_EXCEPTIONS
         try
         {
@@ -554,9 +554,9 @@ __input_c_string(basic_istream<_CharT, _Traits>& __is, _CharT* __p, size_t __n)
             if (__s == __p)
                __state |= ios_base::failbit;
 #ifndef _LIBCPP_NO_EXCEPTIONS
-        }
-        catch (...)
-        {
+        } 
+        catch (...) 
+        { 
             __state |= ios_base::badbit;
             __is.__setstate_nothrow(__state);
             if (__is.exceptions() & ios_base::badbit)
@@ -635,9 +635,9 @@ basic_istream<_CharT, _Traits>&
 operator>>(basic_istream<_CharT, _Traits>& __is, _CharT& __c)
 {
     ios_base::iostate __state = ios_base::goodbit;
-    typename basic_istream<_CharT, _Traits>::sentry __sen(__is);
-    if (__sen)
-    {
+    typename basic_istream<_CharT, _Traits>::sentry __sen(__is); 
+    if (__sen) 
+    { 
 #ifndef _LIBCPP_NO_EXCEPTIONS
         try
         {
@@ -648,9 +648,9 @@ operator>>(basic_istream<_CharT, _Traits>& __is, _CharT& __c)
             else
                 __c = _Traits::to_char_type(__i);
 #ifndef _LIBCPP_NO_EXCEPTIONS
-        }
-        catch (...)
-        {
+        } 
+        catch (...) 
+        { 
             __state |= ios_base::badbit;
             __is.__setstate_nothrow(__state);
             if (__is.exceptions() & ios_base::badbit)
@@ -686,38 +686,38 @@ basic_istream<_CharT, _Traits>::operator>>(basic_streambuf<char_type, traits_typ
 {
     ios_base::iostate __state = ios_base::goodbit;
     __gc_ = 0;
-    sentry __s(*this, true);
-    if (__s)
-    {
-        if (__sb)
+    sentry __s(*this, true); 
+    if (__s) 
+    { 
+        if (__sb) 
         {
-#ifndef _LIBCPP_NO_EXCEPTIONS
-            try
+#ifndef _LIBCPP_NO_EXCEPTIONS 
+            try 
             {
-#endif // _LIBCPP_NO_EXCEPTIONS
-                while (true)
+#endif // _LIBCPP_NO_EXCEPTIONS 
+                while (true) 
                 {
-                    typename traits_type::int_type __i = this->rdbuf()->sgetc();
-                    if (traits_type::eq_int_type(__i, _Traits::eof()))
+                    typename traits_type::int_type __i = this->rdbuf()->sgetc(); 
+                    if (traits_type::eq_int_type(__i, _Traits::eof())) 
                     {
                        __state |= ios_base::eofbit;
-                       break;
+                       break; 
                     }
-                    if (traits_type::eq_int_type(
-                            __sb->sputc(traits_type::to_char_type(__i)),
-                            traits_type::eof()))
-                        break;
-                    ++__gc_;
-                    this->rdbuf()->sbumpc();
-                }
-                if (__gc_ == 0)
+                    if (traits_type::eq_int_type( 
+                            __sb->sputc(traits_type::to_char_type(__i)), 
+                            traits_type::eof())) 
+                        break; 
+                    ++__gc_; 
+                    this->rdbuf()->sbumpc(); 
+                } 
+                if (__gc_ == 0) 
                    __state |= ios_base::failbit;
 #ifndef _LIBCPP_NO_EXCEPTIONS
-            }
-            catch (...)
-            {
+            } 
+            catch (...) 
+            { 
                 __state |= ios_base::badbit;
-                if (__gc_ == 0)
+                if (__gc_ == 0) 
                     __state |= ios_base::failbit;
 
                 this->__setstate_nothrow(__state);
@@ -725,11 +725,11 @@ basic_istream<_CharT, _Traits>::operator>>(basic_streambuf<char_type, traits_typ
                 {
                     throw;
                 }
-            }
+            } 
 #endif // _LIBCPP_NO_EXCEPTIONS
-        }
-        else
-        {
+        } 
+        else 
+        { 
             __state |= ios_base::failbit;
         }
         this->setstate(__state);
@@ -744,9 +744,9 @@ basic_istream<_CharT, _Traits>::get()
     ios_base::iostate __state = ios_base::goodbit;
     __gc_ = 0;
     int_type __r = traits_type::eof();
-    sentry __s(*this, true);
-    if (__s)
-    {
+    sentry __s(*this, true); 
+    if (__s) 
+    { 
 #ifndef _LIBCPP_NO_EXCEPTIONS
         try
         {
@@ -757,9 +757,9 @@ basic_istream<_CharT, _Traits>::get()
             else
                 __gc_ = 1;
 #ifndef _LIBCPP_NO_EXCEPTIONS
-        }
-        catch (...)
-        {
+        } 
+        catch (...) 
+        { 
             this->__setstate_nothrow(this->rdstate() | ios_base::badbit);
             if (this->exceptions() & ios_base::badbit)
             {
@@ -778,10 +778,10 @@ basic_istream<_CharT, _Traits>::get(char_type* __s, streamsize __n, char_type __
 {
     ios_base::iostate __state = ios_base::goodbit;
     __gc_ = 0;
-    sentry __sen(*this, true);
-    if (__sen)
-    {
-        if (__n > 0)
+    sentry __sen(*this, true); 
+    if (__sen) 
+    { 
+        if (__n > 0) 
         {
 #ifndef _LIBCPP_NO_EXCEPTIONS
             try
@@ -805,22 +805,22 @@ basic_istream<_CharT, _Traits>::get(char_type* __s, streamsize __n, char_type __
                 if (__gc_ == 0)
                    __state |= ios_base::failbit;
 #ifndef _LIBCPP_NO_EXCEPTIONS
-            }
+            } 
             catch (...)
             {
                 __state |= ios_base::badbit;
                 this->__setstate_nothrow(__state);
                 if (this->exceptions() & ios_base::badbit)
                 {
-                    if (__n > 0)
-                        *__s = char_type();
+                    if (__n > 0) 
+                        *__s = char_type(); 
                     throw;
-                }
+                } 
             }
 #endif
         }
         else
-        {
+        { 
             __state |= ios_base::failbit;
         }
 
@@ -840,41 +840,41 @@ basic_istream<_CharT, _Traits>::get(basic_streambuf<char_type, traits_type>& __s
 {
     ios_base::iostate __state = ios_base::goodbit;
     __gc_ = 0;
-    sentry __sen(*this, true);
-    if (__sen)
-    {
-#ifndef _LIBCPP_NO_EXCEPTIONS
-        try
+    sentry __sen(*this, true); 
+    if (__sen) 
+    { 
+#ifndef _LIBCPP_NO_EXCEPTIONS 
+        try 
         {
 #endif // _LIBCPP_NO_EXCEPTIONS
-            while (true)
+            while (true) 
             {
-                typename traits_type::int_type __i = this->rdbuf()->sgetc();
-                if (traits_type::eq_int_type(__i, traits_type::eof()))
+                typename traits_type::int_type __i = this->rdbuf()->sgetc(); 
+                if (traits_type::eq_int_type(__i, traits_type::eof())) 
                 {
                    __state |= ios_base::eofbit;
-                   break;
+                   break; 
                 }
-                char_type __ch = traits_type::to_char_type(__i);
-                if (traits_type::eq(__ch, __dlm))
-                    break;
-                if (traits_type::eq_int_type(__sb.sputc(__ch), traits_type::eof()))
-                    break;
-                ++__gc_;
-                this->rdbuf()->sbumpc();
-            }
+                char_type __ch = traits_type::to_char_type(__i); 
+                if (traits_type::eq(__ch, __dlm)) 
+                    break; 
+                if (traits_type::eq_int_type(__sb.sputc(__ch), traits_type::eof())) 
+                    break; 
+                ++__gc_; 
+                this->rdbuf()->sbumpc(); 
+            } 
 #ifndef _LIBCPP_NO_EXCEPTIONS
-        }
-        catch (...)
-        {
+        } 
+        catch (...) 
+        { 
             __state |= ios_base::badbit;
             // according to the spec, exceptions here are caught but not rethrown
-        }
+        } 
 #endif // _LIBCPP_NO_EXCEPTIONS
-        if (__gc_ == 0)
+        if (__gc_ == 0) 
            __state |= ios_base::failbit;
         this->setstate(__state);
-    }
+    } 
     return *this;
 }
 
@@ -888,8 +888,8 @@ basic_istream<_CharT, _Traits>::getline(char_type* __s, streamsize __n, char_typ
     if (__sen)
     {
 #ifndef _LIBCPP_NO_EXCEPTIONS
-        try
-        {
+        try 
+        { 
 #endif // _LIBCPP_NO_EXCEPTIONS
             while (true)
             {
@@ -916,20 +916,20 @@ basic_istream<_CharT, _Traits>::getline(char_type* __s, streamsize __n, char_typ
                 ++__gc_;
             }
 #ifndef _LIBCPP_NO_EXCEPTIONS
-        }
-        catch (...)
-        {
+        } 
+        catch (...) 
+        { 
             __state |= ios_base::badbit;
             this->__setstate_nothrow(__state);
             if (this->exceptions() & ios_base::badbit)
             {
-                if (__n > 0)
-                    *__s = char_type();
+                if (__n > 0) 
+                    *__s = char_type(); 
                 if (__gc_ == 0)
                     __state |= ios_base::failbit;
                 throw;
             }
-        }
+        } 
 #endif // _LIBCPP_NO_EXCEPTIONS
     }
     if (__n > 0)
@@ -950,8 +950,8 @@ basic_istream<_CharT, _Traits>::ignore(streamsize __n, int_type __dlm)
     if (__sen)
     {
 #ifndef _LIBCPP_NO_EXCEPTIONS
-        try
-        {
+        try 
+        { 
 #endif // _LIBCPP_NO_EXCEPTIONS
             if (__n == numeric_limits<streamsize>::max())
             {
@@ -984,16 +984,16 @@ basic_istream<_CharT, _Traits>::ignore(streamsize __n, int_type __dlm)
                 }
             }
 #ifndef _LIBCPP_NO_EXCEPTIONS
-        }
-        catch (...)
-        {
+        } 
+        catch (...) 
+        { 
             __state |= ios_base::badbit;
             this->__setstate_nothrow(__state);
             if (this->exceptions() & ios_base::badbit)
             {
                 throw;
             }
-        }
+        } 
 #endif // _LIBCPP_NO_EXCEPTIONS
         this->setstate(__state);
     }
@@ -1011,23 +1011,23 @@ basic_istream<_CharT, _Traits>::peek()
     if (__sen)
     {
 #ifndef _LIBCPP_NO_EXCEPTIONS
-        try
-        {
+        try 
+        { 
 #endif // _LIBCPP_NO_EXCEPTIONS
             __r = this->rdbuf()->sgetc();
             if (traits_type::eq_int_type(__r, traits_type::eof()))
                 __state |= ios_base::eofbit;
 #ifndef _LIBCPP_NO_EXCEPTIONS
-        }
-        catch (...)
-        {
+        } 
+        catch (...) 
+        { 
             __state |= ios_base::badbit;
             this->__setstate_nothrow(__state);
             if (this->exceptions() & ios_base::badbit)
             {
                 throw;
             }
-        }
+        } 
 #endif // _LIBCPP_NO_EXCEPTIONS
         this->setstate(__state);
     }
@@ -1044,23 +1044,23 @@ basic_istream<_CharT, _Traits>::read(char_type* __s, streamsize __n)
     if (__sen)
     {
 #ifndef _LIBCPP_NO_EXCEPTIONS
-        try
-        {
+        try 
+        { 
 #endif // _LIBCPP_NO_EXCEPTIONS
             __gc_ = this->rdbuf()->sgetn(__s, __n);
             if (__gc_ != __n)
                 __state |= ios_base::failbit | ios_base::eofbit;
 #ifndef _LIBCPP_NO_EXCEPTIONS
-        }
-        catch (...)
-        {
+        } 
+        catch (...) 
+        { 
             __state |= ios_base::badbit;
             this->__setstate_nothrow(__state);
             if (this->exceptions() & ios_base::badbit)
             {
                 throw;
             }
-        }
+        } 
 #endif // _LIBCPP_NO_EXCEPTIONS
     }
     else
@@ -1081,8 +1081,8 @@ basic_istream<_CharT, _Traits>::readsome(char_type* __s, streamsize __n)
     if (__sen)
     {
 #ifndef _LIBCPP_NO_EXCEPTIONS
-        try
-        {
+        try 
+        { 
 #endif // _LIBCPP_NO_EXCEPTIONS
             streamsize __c = this->rdbuf()->in_avail();
             switch (__c)
@@ -1100,16 +1100,16 @@ basic_istream<_CharT, _Traits>::readsome(char_type* __s, streamsize __n)
                 break;
             }
 #ifndef _LIBCPP_NO_EXCEPTIONS
-        }
-        catch (...)
-        {
+        } 
+        catch (...) 
+        { 
             __state |= ios_base::badbit;
             this->__setstate_nothrow(__state);
             if (this->exceptions() & ios_base::badbit)
             {
                 throw;
             }
-        }
+        } 
 #endif // _LIBCPP_NO_EXCEPTIONS
     }
     else
@@ -1131,22 +1131,22 @@ basic_istream<_CharT, _Traits>::putback(char_type __c)
     if (__sen)
     {
 #ifndef _LIBCPP_NO_EXCEPTIONS
-        try
-        {
+        try 
+        { 
 #endif // _LIBCPP_NO_EXCEPTIONS
             if (this->rdbuf() == nullptr || this->rdbuf()->sputbackc(__c) == traits_type::eof())
                 __state |= ios_base::badbit;
 #ifndef _LIBCPP_NO_EXCEPTIONS
-        }
-        catch (...)
-        {
+        } 
+        catch (...) 
+        { 
             __state |= ios_base::badbit;
             this->__setstate_nothrow(__state);
             if (this->exceptions() & ios_base::badbit)
             {
                 throw;
             }
-        }
+        } 
 #endif // _LIBCPP_NO_EXCEPTIONS
     }
     else
@@ -1168,22 +1168,22 @@ basic_istream<_CharT, _Traits>::unget()
     if (__sen)
     {
 #ifndef _LIBCPP_NO_EXCEPTIONS
-        try
-        {
+        try 
+        { 
 #endif // _LIBCPP_NO_EXCEPTIONS
             if (this->rdbuf() == nullptr || this->rdbuf()->sungetc() == traits_type::eof())
                 __state |= ios_base::badbit;
 #ifndef _LIBCPP_NO_EXCEPTIONS
-        }
-        catch (...)
-        {
+        } 
+        catch (...) 
+        { 
             __state |= ios_base::badbit;
             this->__setstate_nothrow(__state);
             if (this->exceptions() & ios_base::badbit)
             {
                 throw;
             }
-        }
+        } 
 #endif // _LIBCPP_NO_EXCEPTIONS
     }
     else
@@ -1204,8 +1204,8 @@ basic_istream<_CharT, _Traits>::sync()
     if (__sen)
     {
 #ifndef _LIBCPP_NO_EXCEPTIONS
-        try
-        {
+        try 
+        { 
 #endif // _LIBCPP_NO_EXCEPTIONS
             if (this->rdbuf() == nullptr)
                 return -1;
@@ -1215,16 +1215,16 @@ basic_istream<_CharT, _Traits>::sync()
                 return -1;
             }
 #ifndef _LIBCPP_NO_EXCEPTIONS
-        }
-        catch (...)
-        {
+        } 
+        catch (...) 
+        { 
             __state |= ios_base::badbit;
             this->__setstate_nothrow(__state);
             if (this->exceptions() & ios_base::badbit)
             {
                 throw;
             }
-        }
+        } 
 #endif // _LIBCPP_NO_EXCEPTIONS
         this->setstate(__state);
     }
@@ -1241,21 +1241,21 @@ basic_istream<_CharT, _Traits>::tellg()
     if (__sen)
     {
 #ifndef _LIBCPP_NO_EXCEPTIONS
-        try
-        {
+        try 
+        { 
 #endif // _LIBCPP_NO_EXCEPTIONS
-        __r = this->rdbuf()->pubseekoff(0, ios_base::cur, ios_base::in);
+        __r = this->rdbuf()->pubseekoff(0, ios_base::cur, ios_base::in); 
 #ifndef _LIBCPP_NO_EXCEPTIONS
-        }
-        catch (...)
-        {
+        } 
+        catch (...) 
+        { 
             __state |= ios_base::badbit;
             this->__setstate_nothrow(__state);
             if (this->exceptions() & ios_base::badbit)
             {
                 throw;
             }
-        }
+        } 
 #endif // _LIBCPP_NO_EXCEPTIONS
         this->setstate(__state);
     }
@@ -1272,22 +1272,22 @@ basic_istream<_CharT, _Traits>::seekg(pos_type __pos)
     if (__sen)
     {
 #ifndef _LIBCPP_NO_EXCEPTIONS
-        try
-        {
+        try 
+        { 
 #endif // _LIBCPP_NO_EXCEPTIONS
             if (this->rdbuf()->pubseekpos(__pos, ios_base::in) == pos_type(-1))
                 __state |= ios_base::failbit;
 #ifndef _LIBCPP_NO_EXCEPTIONS
-        }
-        catch (...)
-        {
+        } 
+        catch (...) 
+        { 
             __state |= ios_base::badbit;
             this->__setstate_nothrow(__state);
             if (this->exceptions() & ios_base::badbit)
             {
                 throw;
             }
-        }
+        } 
 #endif // _LIBCPP_NO_EXCEPTIONS
         this->setstate(__state);
     }
@@ -1304,22 +1304,22 @@ basic_istream<_CharT, _Traits>::seekg(off_type __off, ios_base::seekdir __dir)
     if (__sen)
     {
 #ifndef _LIBCPP_NO_EXCEPTIONS
-        try
-        {
+        try 
+        { 
 #endif // _LIBCPP_NO_EXCEPTIONS
             if (this->rdbuf()->pubseekoff(__off, __dir, ios_base::in) == pos_type(-1))
                 __state |= ios_base::failbit;
 #ifndef _LIBCPP_NO_EXCEPTIONS
-        }
-        catch (...)
-        {
+        } 
+        catch (...) 
+        { 
             __state |= ios_base::badbit;
             this->__setstate_nothrow(__state);
             if (this->exceptions() & ios_base::badbit)
             {
                 throw;
             }
-        }
+        } 
 #endif // _LIBCPP_NO_EXCEPTIONS
         this->setstate(__state);
     }
@@ -1335,8 +1335,8 @@ ws(basic_istream<_CharT, _Traits>& __is)
     if (__sen)
     {
 #ifndef _LIBCPP_NO_EXCEPTIONS
-        try
-        {
+        try 
+        { 
 #endif // _LIBCPP_NO_EXCEPTIONS
             const ctype<_CharT>& __ct = use_facet<ctype<_CharT> >(__is.getloc());
             while (true)
@@ -1352,16 +1352,16 @@ ws(basic_istream<_CharT, _Traits>& __is)
                 __is.rdbuf()->sbumpc();
             }
 #ifndef _LIBCPP_NO_EXCEPTIONS
-        }
-        catch (...)
-        {
+        } 
+        catch (...) 
+        { 
             __state |= ios_base::badbit;
             __is.__setstate_nothrow(__state);
             if (__is.exceptions() & ios_base::badbit)
             {
                 throw;
             }
-        }
+        } 
 #endif // _LIBCPP_NO_EXCEPTIONS
         __is.setstate(__state);
     }
@@ -1445,9 +1445,9 @@ operator>>(basic_istream<_CharT, _Traits>& __is,
            basic_string<_CharT, _Traits, _Allocator>& __str)
 {
     ios_base::iostate __state = ios_base::goodbit;
-    typename basic_istream<_CharT, _Traits>::sentry __sen(__is);
-    if (__sen)
-    {
+    typename basic_istream<_CharT, _Traits>::sentry __sen(__is); 
+    if (__sen) 
+    { 
 #ifndef _LIBCPP_NO_EXCEPTIONS
         try
         {
@@ -1479,9 +1479,9 @@ operator>>(basic_istream<_CharT, _Traits>& __is,
             if (__c == 0)
                __state |= ios_base::failbit;
 #ifndef _LIBCPP_NO_EXCEPTIONS
-        }
-        catch (...)
-        {
+        } 
+        catch (...) 
+        { 
             __state |= ios_base::badbit;
             __is.__setstate_nothrow(__state);
             if (__is.exceptions() & ios_base::badbit)
@@ -1501,9 +1501,9 @@ getline(basic_istream<_CharT, _Traits>& __is,
         basic_string<_CharT, _Traits, _Allocator>& __str, _CharT __dlm)
 {
     ios_base::iostate __state = ios_base::goodbit;
-    typename basic_istream<_CharT, _Traits>::sentry __sen(__is, true);
-    if (__sen)
-    {
+    typename basic_istream<_CharT, _Traits>::sentry __sen(__is, true); 
+    if (__sen) 
+    { 
 #ifndef _LIBCPP_NO_EXCEPTIONS
         try
         {
@@ -1532,9 +1532,9 @@ getline(basic_istream<_CharT, _Traits>& __is,
             if (__extr == 0)
                __state |= ios_base::failbit;
 #ifndef _LIBCPP_NO_EXCEPTIONS
-        }
-        catch (...)
-        {
+        } 
+        catch (...) 
+        { 
             __state |= ios_base::badbit;
             __is.__setstate_nothrow(__state);
             if (__is.exceptions() & ios_base::badbit)
@@ -1580,9 +1580,9 @@ basic_istream<_CharT, _Traits>&
 operator>>(basic_istream<_CharT, _Traits>& __is, bitset<_Size>& __x)
 {
     ios_base::iostate __state = ios_base::goodbit;
-    typename basic_istream<_CharT, _Traits>::sentry __sen(__is);
-    if (__sen)
-    {
+    typename basic_istream<_CharT, _Traits>::sentry __sen(__is); 
+    if (__sen) 
+    { 
 #ifndef _LIBCPP_NO_EXCEPTIONS
         try
         {
@@ -1611,9 +1611,9 @@ operator>>(basic_istream<_CharT, _Traits>& __is, bitset<_Size>& __x)
             if (_Size > 0 && __c == 0)
                __state |= ios_base::failbit;
 #ifndef _LIBCPP_NO_EXCEPTIONS
-        }
-        catch (...)
-        {
+        } 
+        catch (...) 
+        { 
             __state |= ios_base::badbit;
             __is.__setstate_nothrow(__state);
             if (__is.exceptions() & ios_base::badbit)