4 ms·

Can't build it on Debian, getting: /usr/include/features.h:374:25: fatal error: sys/cdefs.h: No such file or directory # include <sys/cdefs.h> (I

by S4M 11y ago

Can't build it on Debian, getting: /usr/include/features.h:374:25: fatal error: sys/cdefs.h: No such file or directory # include <sys/cdefs.h> (I installed uuidcdef, for what it's worth). Also I don't understand the code for the operator and, isn't it gonna return #t whenever x is null?

striking 11y ago
Builds just fine on Arch Linux. Maybe this article might help you: http://askubuntu.com/questions/470796/fatal-error-sys-cdefs-h-no-such-file-or-directory/ http://askubuntu.com/questions/470796/fatal-error-sys-cdefs-...
- S4M 11y ago
  Yep, it works, thanks for pointing it!
gjm11 11y ago
Yes, it is. But x isn't one of the operands -- it's a list of all the operands. And (and) should evaluate to #t for the same reason as (+) should evaluate to 0 and (*) should evaluate to 1. (And also why 0! = 1.)
- S4M 11y ago
  Ha got it, thanks! But what's e then?
  - kazinator 11y ago
    The environment object which eval needs to resolve variable references. This operator is defining a function which interprets and operator calls.