Re^2: log() and int() problem

[dave_the_m]

And internally floats are stored in the string-slot of a variable

No they're not. An xpvnv has separate slots for an int, a float and a string:

[davem@pigeon bleed]$ p -MDevel::Peek -e'$x=1; $x=2.2; $x = "three"; D
+ump $x'
SV = PVNV(0x1ae3150) at 0x1b021d0
  REFCNT = 1
  FLAGS = (POK,pPOK)
  IV = 1
  NV = 2.2
  PV = 0x1afb360 "three"\0
  CUR = 5
  LEN = 16

Dave.