First work on using a Lexesis lexer in the regex parser

src/re.cpp

@@ -158,9 +158,6 @@ namespace lxs {
                 case ']':
                 case '?':
                 case '.':
-                case '\'':
-                case '"':
-                case '-':
                     break;
                 case 'n':
                     c = '\n'; break;

src/regexLexer.lxs

@@ -0,0 +1,38 @@
+CHAR_CLASS = \[^?\]?-?([^]-]-[^]-]|[^]-])+-?\]|\[^?(-|\]|\]-)\]
+
+#All the escape sequences
+TAB = \\t
+NEWLINE = \\n
+CARRIAGE_RETURN = \\r
+BACKSPACE = \\b
+SPACE = \\s|\s
+BELL = \\a
+FORMFEED = \\f
+VTAB = \\v
+
+BACKSLASH = \\\\
+ESCAPED_STAR = \\\*
+ESCAPED_PLUS = \\\+
+ESCAPED_PIPE = \\\|
+ESCAPED_LPAREN = \\\(
+ESCAPED_RPAREN = \\\)
+ESCAPED_LBRACKET = \\\[
+ESCAPED_RBRACKET = \\\]
+ESCAPED_QUESTIONMARK = \\\?
+ESCAPED_DOT = \\\.
+
+# The special chars
+DOT = \.
+STAR = \*
+PLUS = \+
+QUESTIONMARK = \?
+PIPE = \|
+LPAREN = \(
+RPAREN = \)
+
+# Anything other than these is valid
+# It cannot be ] or [, since those should be handled by CHAR_CLASS
+# If it is a \, it is an invalid escape sequence
+CHAR = [^][\]
+
+ERROR = .