I guess the "lexer hack" probably has something to do with the lexer refering back to the symbol table to disambiguate things like typecast and function calls?

I guess the "lexer hack" probably has something to do with the lexer refering back to the symbol table to disambiguate things like typecast and function calls? Ie T(x) and f(x). Certainly there are other ambiguities that this particular hack may not resolve?