Re: box? on address

2017-02-10 Thread Joh-Tob Schäg
Hi Regenaxer, I realize that there is no probkem with the evaluation of 'circ?. Could 'later be (miss)used to cause some havick when it writes back data? What about timer triggered code? Am 10.02.2017 22:40 schrieb "Alexander Burger" : > Hi Joh-Tob, > > > Doesn't 'circ? also set the gc bit? > > W

Re: box? on address

2017-02-10 Thread Alexander Burger
Hi Joh-Tob, > Doesn't 'circ? also set the gc bit? Well observed!! That't true, but it is the "other" mark bit. While gc uses the bit in the CDR or (X CDR) 1 # Set mark bit uses 'circ' the one in the CAR of the cell or (A) 1 # Mark > Could it be possible that 'circ? evaluates a term w

Re: box? on address

2017-02-10 Thread Joh-Tob Schäg
Doesn't 'circ? also set the gc bit? Could it be possible that 'circ? evaluates a term which accesses something with a changed pointer? Am 10.02.2017 18:12 schrieb "Alexander Burger" : > H Danilo, > > > Please take a quick look at [path "@doc64/structures"] and > > source code of `car' and `val'. >

Re: box? on address

2017-02-10 Thread Alexander Burger
H Danilo, > Please take a quick look at [path "@doc64/structures"] and > source code of `car' and `val'. > > I am not sure what will happen if GC bit is 1. This is a good question. The interpreter would crash with a bus error. Fortunately this won't happen because this bit is guaranteed to be se

Re: box? on address

2017-02-10 Thread pd
Hi Danilo Isn't [doc 'car] clear enough? > clear as an unmuddied lake ;-) doc should be read because reading it makes guessing innecesary ;-) > > Please take a quick look at [path "@doc64/structures"] and > source code of `car' and `val'. > > I am not sure what will happen if GC bit is 1. >

Re: box? on address

2017-02-10 Thread Danilo Kordic
A few more examples: : [setq S1 "A"] -> "A" : (box? S1) -> NIL : (name S1 "") -> "NIL" # ?! : S1 -> "NIL" : (name NIL) -> NIL # ?! : (name 'S1) -> "S1" : [setq B1 [box 'val]] -> $177002116445201 : (val B1) -> val : (name B1) -> NIL : (name S1 B1) -> $177002116444132 : (name S1) -> NIL : (box? S

Re: box? on address

2017-02-09 Thread pd
On Thu, Feb 9, 2017 at 6:13 PM, Christopher Howard wrote: > Hi, I was just trying to understand... > > : (box? (box (4 5 6))) > -> $384375304 > : (box? $384375304) > -> NIL > : (car $384375304) > -> 4 > > Shouldn't (box? $384375304) be non-NIL? > As Danilo said box? evaluates its arguments and t

Re: box? on address

2017-02-09 Thread Mike Pechkin
hi, Lets talk about ​​t ransient ​s​ ymbols ​ from this two links: http://software-lab.de/doc/ref.html#transient http://pastebin.com/AsuveCFY ​ On Thu, Feb 9, 2017 at 7:13 PM, Christopher Howard wrote: > Hi, I was just trying to understand... > > : (box? (box (4 5 6))) > -> $384375304 > : (box

Re: box? on address

2017-02-09 Thread Danilo Kordic
`box?' evaluates it's argument. In this case it is `lst' ``(4 5 6)''. BTW I didn't know `print'ed box can be `read' back. For example ``$0'' does have a name, but `print'ed one does not. It makes no sense to me. On 2/9/17, Christopher Howard wrote: > Hi, I was just trying to understand... > >

box? on address

2017-02-09 Thread Christopher Howard
Hi, I was just trying to understand... : (box? (box (4 5 6))) -> $384375304 : (box? $384375304) -> NIL : (car $384375304) -> 4 Shouldn't (box? $384375304) be non-NIL? -- Christopher Howard, Computer Assistant Alaska Satellite Internet 3239 La Ree Way, Fairbanks, AK 99709 907-451-0088 or 888-396