@@ -14,9 +14,9 @@
 class LexException : Exception
 {
 	const LexPosition pos;
 
-	this( const LexPosition pos, string msg, string file="", int line=0, Throwable next=null )
+	this( const LexPosition pos, string msg, string file=null, size_t line=0, Throwable next=null )
 		{ super(sprintf!"[%s] %s"(pos, msg), file, line, next); this.pos = pos; }
 };
 
 /// Represents a position in a source code