Add support for case conversion characters in regex substitutions.

Allow using Perl-like \l, \L, \u, \U and \E escape sequences in the
substitution string used with %rename("%(regex:/pattern/subst/)s").
This is useful for e.g. title casing all string after removing some prefix.

Closes #82

Examples/test-suite/csharp/rename_pcre_encoder_runme.cs

@@ -4,9 +4,12 @@ using rename_pcre_encoderNamespace;
 public class runme {
   static void Main() {
     SomeWidget w = new SomeWidget();
-    w.putBorderWidth(17);
-    if ( w.getBorderWidth() != 17 )
+    w.put_borderWidth(17);
+    if ( w.get_borderWidth() != 17 )
       throw new Exception(String.Format("Border with should be 17, not {0}",
-                                        w.getBorderWidth()));
+                                        w.get_borderWidth()));
+
+    if ( rename_pcre_encoder.StartINSAneAndUNSAvoryTraNSAtlanticRaNSAck() != 42 )
+      throw new Exception("Unexpected result of renamed function call");
   }
 }

Examples/test-suite/java/rename_pcre_encoder_runme.java

@@ -6,9 +6,11 @@ public class rename_pcre_encoder_runme {
   public static void main(String argv[])
   {
     SomeWidget w = new SomeWidget();
-    w.putBorderWidth(17);
-    if ( w.getBorderWidth() != 17 )
+    w.put_borderWidth(17);
+    if ( w.get_borderWidth() != 17 )
       throw new RuntimeException(String.format("Border with should be 17, not %d",
-                                               w.getBorderWidth()));
+                                               w.get_borderWidth()));
+    if ( rename_pcre_encoder.StartINSAneAndUNSAvoryTraNSAtlanticRaNSAck() != 42 )
+      throw new RuntimeException("Unexpected result of renamed function call");
   }
 }

Examples/test-suite/python/rename_pcre_encoder_runme.py

@@ -1,13 +1,16 @@
 from rename_pcre_encoder import *
 
 s = SomeWidget()
-s.putBorderWidth(3)
-if s.getBorderWidth() != 3:
-    raise RuntimeError("Border should be 3, not %d" % (s.getBorderWidth(),))
+s.put_borderWidth(3)
+if s.get_borderWidth() != 3:
+    raise RuntimeError("Border should be 3, not %d" % (s.get_borderWidth(),))
 
-s.putSize(4, 5)
+s.put_size(4, 5)
 a = AnotherWidget()
 a.DoSomething()
 
 evt = wxEVTSomeEvent()
 t   = xUnchangedName()
+
+if StartINSAneAndUNSAvoryTraNSAtlanticRaNSAck() != 42:
+    raise RuntimeError("Unexpected result of renamed function call")

Examples/test-suite/rename_pcre_encoder.i

@@ -3,9 +3,14 @@
 // strip the wx prefix from all identifiers except those starting with wxEVT
 %rename("%(regex:/wx(?!EVT)(.*)/\\1/)s") "";
 
-// Replace "Set" and "Get" prefixes with "put" and "get" respectively.
-%rename("%(regex:/^Set(.*)/put\\1/)s", %$isfunction) "";
-%rename("%(regex:/^Get(.*)/get\\1/)s", %$isfunction) "";
+// Change "{Set,Get}Foo" naming convention to "{put,get}_foo" one.
+%rename("%(regex:/^Set(.*)/put_\\l\\1/)s", %$isfunction) "";
+%rename("%(regex:/^Get(.*)/get_\\l\\1/)s", %$isfunction) "";
+
+// Make some words stand out (unfortunately we don't have "global" flag): we
+// use \U to capitalize the second capture group and then \E to preserve the
+// case of the rest.
+%rename("%(regex:/(.*?)(nsa)(.*?)\\2(.*?)\\2(.*?)\\2(.*)/\\1\\U\\2\\E\\3\\U\\2\\E\\4\\U\\2\\E\\5\\U\\2\\E\\6/)s") "";
 
 %inline %{
 
@@ -28,4 +33,6 @@ class wxEVTSomeEvent {
 class xUnchangedName {
 };
 
+inline int StartInsaneAndUnsavoryTransatlanticRansack() { return 42; }
+
 %}