iomode.rb in rio-0.3.8

- old
+ new

@@ -1,8 +1,8 @@
 #--
 # =============================================================================== 
-# Copyright (c) 2005, Christopher Kleckner
+# Copyright (c) 2005, 2006 Christopher Kleckner
 # All rights reserved
 #
 # This file is part of the Rio library for ruby.
 #
 # Rio is free software; you can redistribute it and/or modify
@@ -20,11 +20,11 @@
 # Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 # =============================================================================== 
 #++
 #
 # To create the documentation for Rio run the command
-#  rake rdoc
+#  ruby build_doc.rb
 # from the distribution directory. Then point your browser at the 'doc/rdoc' directory.
 #
 # Suggested Reading
 # * RIO::Doc::SYNOPSIS
 # * RIO::Doc::INTRO
@@ -56,11 +56,11 @@
         @mode = other.mode
       end
       
       def to_s() @mode.to_s end
 
-      abstract_method :primarily_read?, :primarily_write?, :allows_both?
+      abstract_method :primarily_read?, :primarily_write?, :allows_both?, :creates?
 
       def read_only?()
         allows_read? and !allows_write?
       end
       def write_only?()
@@ -82,9 +82,10 @@
       def primarily_write?() @mode[0,1] == 'w' or primarily_append? end
       def primarily_append?() @mode[0,1] == 'a' end
       def allows_both?()
         @mode[1,1] == '+'
       end
+      def creates?() primarily_append? || primarily_write? end
     end
     class Str < Base
       include StrMethods
     end
   end