DSL EXPRESSION:
1  =~ 2  =~ 3


AST:
"block" [tt:block] [nt:StatementBlock]
    "=~" [tt:op_eqtilde] [nt:BareBoolean]
        "=~" [tt:op_eqtilde] [nt:Operator]
            "=~" [tt:op_eqtilde] [nt:Operator]
                "1" [tt:int_literal] [nt:int_literal]
                "2" [tt:int_literal] [nt:int_literal]
            "3" [tt:int_literal] [nt:int_literal]

