Design guidelines for parser and lexer?

What you should really do is write a grammar for your language. Once you have that, the boundary is easy.

A good litmus test for deciding if something should be done by a parser or lexer is to ask yourself a question.

I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.