On Sun, Aug 29, 2010 at 8:55 PM, Pascal J. Bourguignon <pjb@informatimago.com> wrote:

;;;   In function MAKE-KEYWORD, checking types of arguments SYM.
What does this note mean?

That means a possibly expensive type check for SYM was inserted at the beginning of the function. In this case it is possibly ensuring that SYM has the right type for STRING
 
I hope that in addition to checking the types of the arguments, it
also generates the code to do the required computations... ;-)

Sure :-) I thought the warning is important because of the expensiveness of the checks, which may slow down critical functions.

Juanjo

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