X-Git-Url: http://nitlanguage.org

diff --git a/lib/parser_base.nit b/lib/parser_base.nit
index 234b733..b623137 100644
--- a/lib/parser_base.nit
+++ b/lib/parser_base.nit
@@ -11,6 +11,8 @@
 # Simple base for hand-made parsers of all kinds
 module parser_base
 
+import serialization
+
 # Basic facilities for common parser operations on String sources
 class StringProcessor
 	# Source document to parse
@@ -101,16 +103,21 @@ class StringProcessor
 
 	# Ignores any printable character until a whitespace is encountered
 	protected fun ignore_until_whitespace: Int do
-		while not src[pos].is_whitespace do pos += 1
+		while src.length > pos and not src[pos].is_whitespace do pos += 1
 		return pos
 	end
 
 	# Returns the current location as a `Location` object
 	protected fun hot_location: Location do return new Location(line, line_offset)
+
+	# Is `pos` at the end of the source?
+	protected fun eof: Bool do return pos >= src.length
 end
 
 # Information about the location of an entity in a source document
 class Location
+	serialize
+
 	# Line in which the element is described
 	var line: Int
 	# Offset in the line at which the element is positioned