DSL EXPRESSION:
1 *   2 ** 3


AST:
"block" [tt:block] [nt:StatementBlock]
    "*" [tt:op_star] [nt:BareBoolean]
        "*" [tt:op_star] [nt:Operator]
            "1" [tt:int_literal] [nt:int_literal]
            "**" [tt:op_pow] [nt:Operator]
                "2" [tt:int_literal] [nt:int_literal]
                "3" [tt:int_literal] [nt:int_literal]

