-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hi Enoch,
What about the following (real) session log > forward: foo ok > : bar foo ; ok > bar found only forward declaration. > : foo ." Hey" ; ok > bar Hey ok > ? It declares a forward symbol named foo which is used in bar. There is a runtime check, whether foo has been redefined or not. If it hasn't, the first error message is printed (when calling bar). If foo got re-defined (or defined, depends on the view point) it will be called. Furthermore the forwardly declared call to foo in bar will be replaced with the newly defined foo so the runtime check will occur only once. And it will erase the flash only once for every occurance of foo (there is a !i operation) Another example? > forward: foo ok > : bar foo ; ok > : baz foo ; ok > bar found only forward declaration. > : foo ." I'm number 1" ; ok > bar I'm number 1 ok > : foo ." I'm number 2" ; ok > baz I'm number 2 ok > bar I'm number 1 ok > baz I'm number 2 ok > The definition of forward: is small (5 lines of forth code), but digs very deep into internals and is by no means portable to other systems. Most of the forward:code can be used to implement late binding, with potentially heavy runtime costs (unless a special wordlist is used). Matthias -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.11 (GNU/Linux) Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/ iEYEARECAAYFAlLmr4kACgkQ9bEHdGEMFjPH4gCfTg0HBwHNwdx1X5a8LvzsJbRU 1bAAoOM5Ogur4YqdmwB8cnvFBS29owgN =XrpT -----END PGP SIGNATURE----- ------------------------------------------------------------------------------ CenturyLink Cloud: The Leader in Enterprise Cloud Services. Learn Why More Businesses Are Choosing CenturyLink Cloud For Critical Workloads, Development Environments & Everything In Between. Get a Quote or Start a Free Trial Today. http://pubads.g.doubleclick.net/gampad/clk?id=119420431&iu=/4140/ostg.clktrk _______________________________________________ Amforth-devel mailing list for http://amforth.sf.net/ Amforth-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/amforth-devel
