Index: libstdc++-v3/ChangeLog
===================================================================
--- libstdc++-v3/ChangeLog	(revision 250720)
+++ libstdc++-v3/ChangeLog	(working copy)
@@ -1,3 +1,34 @@
+2017-07-30  Daniel Kruegler  <daniel.kruegler@gmail.com>
+
+	PR libstdc++/79162
+    Implement LWG 2946, LWG 2758's resolution missed further corrections
+    * include/bits/basic_string.h (basic_string::compare): Add missing 
+    required noexcept specifications.
+    * include/bits/basic_string.h (basic_string): Introduce internal
+    _S_to_string_view and __sv_wrapper for implicit string_view conversion.
+    * include/bits/basic_string.h (basic_string::basic_string): Fix explicit
+    string_view conversion by implicit conversion using _S_to_string_view and
+    __sv_wrapper.
+    * include/bits/basic_string.h (basic_string): Introduce internal
+    basic_string(__sv_wrapper, Alloc) constructor.
+    * include/bits/basic_string.h (basic_string): Fix operator=(T) template
+    by operator=(const T&) template for uncopyable types (79162).
+    * include/bits/basic_string.h (basic_string::operator+=, 
+    basic_string::append, basic_string::assign, basic_string::insert,
+    basic_string::replace, basic_string::find, basic_string::rfind,
+    basic_string::find_first_of, basic_string::find_last_of, 
+    basic_string::find_first_not_of, basic_string::find_last_not_of,
+    basic_string::compare): Replace __sv_type argument by template const T& 
+    (LWG 2946) and correct documentation describing __sv_type argument.
+    * include/bits/basic_string.h (basic_string::find, basic_string::rfind,
+    basic_string::find_first_of, basic_string::find_last_of, 
+    basic_string::find_first_not_of, basic_string::find_last_not_of,
+    basic_string::compare): Replace unconditional noexcept specification by
+    conditional noexcept specification to partially balance the remove of 
+    noexcept by LWG 2946.
+	* testsuite/21_strings/basic_string/79162.cc: New.
+	* testsuite/21_strings/basic_string/lwg2946.cc: New.
+    
 2017-07-26  Jonathan Wakely  <jwakely@redhat.com>
 
 	* testsuite/27_io/basic_fstream/53984.cc: Fix test.