[Patch, libstdc++/64239] Use std::swap instead of swap in regex

[Tim Shen <timshen@google.com>]

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Bootstrapped and tested. It could be also patched to 4.9 branch.

Thanks!


-- 
Regards,
Tim Shen

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commit dfe3a26759893849020a659b14fafe8b27e90dae
Author: timshen <timshen@google.com>
Date:   Tue Jan 6 19:30:27 2015 -0800

    	PR libstdc++/64239
    
    	* include/bits/regex.h (match_results<>::swap): Use std::swap
    	instead of swap.
    	* include/bits/regex_compiler.tcc (_Compiler<>::_M_quantifier):
    	Likewise.

diff --git a/libstdc++-v3/include/bits/regex.h b/libstdc++-v3/include/bits/regex.h
index 9b7ed8c..b520039 100644
--- a/libstdc++-v3/include/bits/regex.h
+++ b/libstdc++-v3/include/bits/regex.h
@@ -1864,7 +1864,7 @@ _GLIBCXX_BEGIN_NAMESPACE_CXX11
       swap(match_results& __that)
       {
 	_Base_type::swap(__that);
-	swap(_M_begin, __that._M_begin);
+	std::swap(_M_begin, __that._M_begin);
       }
       //@}
 
diff --git a/libstdc++-v3/include/bits/regex_compiler.tcc b/libstdc++-v3/include/bits/regex_compiler.tcc
index 57bafa3..33d7118 100644
--- a/libstdc++-v3/include/bits/regex_compiler.tcc
+++ b/libstdc++-v3/include/bits/regex_compiler.tcc
@@ -276,7 +276,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
 		{
 		  auto& __tmp = (*_M_nfa)[__stack.top()];
 		  __stack.pop();
-		  swap(__tmp._M_next, __tmp._M_alt);
+		  std::swap(__tmp._M_next, __tmp._M_alt);
 		}
 	    }
 	  _M_stack.push(__e);