.. can never be matched as ..

[Walter Milner]

My grammar includes:
TOKEN : { < CONSTANT : (["0"-"9"])+ > }
TOKEN : { < VARIABLE : ["x"-"z"] > }
TOKEN : { < TERM : <CONSTANT> | <VARIABLE> > }
but I get warning Regular expression choice : CONSTANT can never be matched as : TERM
Why not?
How come
12
would not be a term, since it is a constant?
Aplogies for my lack of a brain

[bblla...@gmail.com]

Considering the order of token definitions, the token TERM will never match anything, because it was already matched by the CONSTANT/VARIABLE definitions itself.

If you want to use tokens only within other tokens, use the following definition:

<#MY_TOKEN_PART: "bla">
<MY_TOKEN: <MY_TOKEN_PART> "blu">

Hope that helps.