--- a/sema/Visitor.d	Fri Apr 18 11:07:46 2008 +0200
+++ b/sema/Visitor.d	Fri Apr 18 11:46:00 2008 +0200
@@ -45,6 +45,8 @@
                 return visitDeclStmt(cast(DeclStmt)stmt);
             case StmtType.Exp:
                 return visitExpStmt(cast(ExpStmt)stmt);
+            case StmtType.If:
+                return visitIfStmt(cast(IfStmt)stmt);
             default:
                 throw new Exception("Unknown statement type");
         }
@@ -119,6 +121,17 @@
             return StmtT.init;
     }
 
+    StmtT visitIfStmt(IfStmt s)
+    {
+        visitExp(s.cond);
+        foreach (stmt; s.then)
+            visitStmt(stmt);
+        static if (is(StmtT == void))
+            return;
+        else
+            return StmtT.init;
+    }
+
     StmtT visitExpStmt(ExpStmt s)
     {
         visitExp(s.exp);