[3.1.0] Continue building up validation functions

- Remove incorrect parsing of value aliases
- Implement most allowed and value alias checks
- Add assertIsBool, assertIsArray and assertIsLookup to ValidatorAtom
- Publish string types in VarParser

git-svn-id: http://htmlpurifier.org/svnroot/htmlpurifier/trunk@1647 48356398-32a2-884e-a903-53898d9a118a

library/HTMLPurifier/VarParser.php

@@ -24,6 +24,17 @@ class HTMLPurifier_VarParser
         'mixed'     => true
     );
     
+    /**
+     * Lookup table of types that are string, and can have aliases or
+     * allowed value lists.
+     */
+    static public $stringTypes = array(
+        'string'    => true,
+        'istring'   => true,
+        'text'      => true,
+        'itext'     => true,
+    );
+    
     /**
      * Validate a variable according to type. Throws
      * HTMLPurifier_VarParserException if invalid.