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*To*: Pitman@YALE.ARPA, T-DISCUSSION-TRANSCRIPT@MIT-MC.ARPA*Subject*: STRING->INTEGER*From*: Jonathan Rees <Rees@YALE.ARPA>*Date*: Tue ,12 Apr 83 23:35:00 EDT

[This message failed to get through to MC when it was originally sent.] This is a hairy problem. Looking at the agony Common Lisp is going through trying to provide a general solution to this problem is enough to convince me not to address it. It has some routine which parses numbers, and it takes about ten optional arguments. What should happen if there's no number there? How does one find out at what position the parse completed? What if the number is terminated by something other than end-of-string? What about decimal points and radix prefixes? etc. I don't like installing half-solutions to complicated problems unless it really seems essential to provide the feature, and in this case it doesn't. It seems like there is some problem here but I haven't yet seen a very satisfactory solution. There is an internal system routine (STRING->INTEGER string radix) which may do the conversion you want. I'm not sure how it addresses the above problems, and of course its being unreleased means it's risky to depend on it. Maybe I can be convinced that it should be released. (Note that fixnums are an implementation hack, not really part of the language, so the manual and I avoid talking about them.) -------

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