4 ms·

what does (the ....) do?

• ska80 2y ago
  > what does (the ....) do? Specifies the type of the form. In this example, it tells the CL compiler that the returned `(+ x y)` is a `fixnum`.
  • ArtixFox 2y ago
    Oh thank you!!
• ska80 2y ago
  You can also get the same result by declaring the function's type: * (declaim (ftype (function (fixnum fixnum) fixnum) fx-add)) (FX-ADD) * (defun fx-add (x y) (declare (optimize (speed 3) (safety 0) (debug 0))) (+ x y)) FX-ADD * (disassemble 'fx-add) ; disassembly for FX-ADD ; Size: 6 bytes. Origin: #x552C81A6 ; FX-ADD ; 6: 4801FA ADD RDX, RDI ; 9: C9 LEAVE ; A: F8 CLC ; B: C3 RET NIL