* testsuite/util/testsuite_allocator.h (PointerBase::operator[]): Add.

From-SVN: r227661

libstdc++-v3/ChangeLog

 2015-09-10  Jonathan Wakely  <jwakely@redhat.com>
 
+	* testsuite/util/testsuite_allocator.h (PointerBase::operator[]): Add.
+
 	* testsuite/21_strings/basic_string/operators/char/1.cc: Verify the
 	string contents.
 

libstdc++-v3/testsuite/util/testsuite_allocator.h

@@ -575,6 +575,7 @@ namespace __gnu_test
 
       T& operator*() const { return *value; }
       T* operator->() const { return value; }
+      T& operator[](difference_type n) const { return value[n]; }
 
       Derived& operator++() { ++value; return derived(); }
       Derived operator++(int) { Derived tmp(derived()); ++value; return tmp; }