I am trying to make programming language in Java and need to create a parser, I have made a Lexer and that works pretty well but I just can't seem to understand how to parse the tokens! I would like to not use any generators like ANTLR as I prefer to make things myself but if someone could please point me in the correct direction of how a parser actually processes information and builds an AST?

P.S. The reason I haven't added any of the languages syntax is because I want that to be customisable!

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