2.1-beta1: Compiler: Keywords in variable names shoulden't be forbidden

[skruppy]

Reproduce

According to http://forums.invenzzia.org/index.php/topic,326.0.html , keywords in variable names should be allowed. Example templates which should compile without problems are:

<opt:if test="$new">

<foo name="$basic@lte" />

<foo name="$item.lte" />

Result

The examples above throw an exception while evaluating the expression during compile time. All those exception lead to problems related to keywords in variable names.

Expected

The examples above should compile without exceptions like in version 2.0.

Workaround

Rename your variables e.g. appending an "Item" ("$new" becomes "$newItem" and so on)