This is what sets you apart from the rest. You refuse to accept the fact that you don't know something and that you should learn.

What you are trying to do is an impossibility. It's called ambiguity for a reason, as it can be parsed many ways. Take a course in automata theory. Find a copy of Hopcraft and Ullman's, Formal Language and Automata theory. Prolly munged the title a little, but no matter, they didn't write many books. Anyway, look on the part of left normal form, right normal forms, and ambiguity. The fact you can have multiple parse trees for a "complex expression" using that char, the pipe symbol, is BAD, because it can have multiple valid and invalid meanings, AS WAS TOLD TO YOU BEFORE.

It, as was told to me by a great professor, language and automata theory, has been already studied quite thoroughly, to the point that there's not much new to learn. Not only are you saying the og poster is wrong, not that I am wrong, but established computer scientists in the field, is wrong. You are not outsmarting anyone.

Once you boasted how you've written how much more code you've written than me. That may be, but quite frankly, you've learned nothing from it. Either a. you are a genuine troll or b. you have a learning or social deficiency that you have yet to admit or c, you have an ego the size of kansas.

Update: p.s. computer science is BASED on math. A programming language, which needs to be parsed and interpreted by a math machine, not being mathematical, using mathematical theory (language theory) is a backwards statement