Added unicode support to dot metacharacter - it now matches _any_ unicode character (almost)

postfixNode.go

@@ -26,6 +26,7 @@ type postfixNode struct {
 	contents  []rune // Contents of the node - the length of this would only be >1 if the node represents a character class
 	startReps int    // Minimum number of times the node should be repeated - used with numeric specifiers
 	endReps   int    // Maximum number of times the node should be repeated - used with numeric specifiers
+	isDot     bool   // Whether or not the current node represents a 'dot' metacharacter
 }
 
 // Creates a new escaped node - the given character is assumed to have been preceded by a backslash
@@ -105,9 +106,22 @@ func newPostfixNode(contents ...rune) postfixNode {
 	return to_return
 }
 
+// Creates and returns a postfixNode representing the 'dot' metacharacter.
+func newPostfixDotNode() postfixNode {
+	toReturn := postfixNode{}
+	toReturn.startReps = 1
+	toReturn.endReps = 1
+	toReturn.nodetype = CHARACTER
+	toReturn.isDot = true
+	toReturn.contents = []rune{ANY_CHAR}
+	return toReturn
+}
+
 // Creates a character node, regardless of the contents
 func newPostfixCharNode(contents ...rune) postfixNode {
 	toReturn := postfixNode{}
+	toReturn.startReps = 1
+	toReturn.endReps = 1
 	toReturn.nodetype = CHARACTER
 	toReturn.contents = append(toReturn.contents, contents...)
 	return toReturn