Issue 4550: Avoid "using namespace std;" in included files (Take 2)

lily/side-position-interface.cc

Index: lily/side-position-interface.cc
diff --git a/lily/side-position-interface.cc b/lily/side-position-interface.cc
index 762d9ade3506989627df89e80a2eb99f2476037d..d540b12bff6e472a1491b32d78386bea8a45dfa5 100644
--- a/lily/side-position-interface.cc
+++ b/lily/side-position-interface.cc
@@ -24,7 +24,6 @@
 #include <set>
 #include <map>
 
-using namespace std;
 
 #include "accidental-interface.hh"
 #include "accidental-placement.hh"
@@ -49,6 +48,10 @@ using namespace std;
 #include "warn.hh"
 #include "unpure-pure-container.hh"
 
+using std::set;
+using std::string;
+using std::vector;
+
 void
 Side_position_interface::add_support (Grob *me, Grob *e)
 {
@@ -357,7 +360,7 @@ Side_position_interface::aligned_side (Grob *me, Axis a, bool pure, int start, i
     total_off = minimum_space * dir;
 
   if (current_off)
-    total_off = dir * max (dir * total_off,
+    total_off = dir * std::max (dir * total_off,
                            dir * (*current_off));
 
   /* FIXME: 1000 should relate to paper size.  */
@@ -416,7 +419,7 @@ Side_position_interface::aligned_side (Grob *me, Axis a, bool pure, int start, i
           Real diff = (dir * staff_extent[dir] + staff_padding
                        - dir * total_off
                        + dir * (staff_position - parent_position));
-          total_off += dir * max (diff, 0.0);
+          total_off += dir * std::max (diff, 0.0);
         }
     }
   return scm_from_double (total_off);