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01:20:07 <ttmrichter> Makign a subroutine-threaded Forth in ARM is a pain.
01:20:34 <ttmrichter> Because there's no real "call" instruction as such.  You have to do it manually by pushing the link register, then calling through it.
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01:32:47 <xyh> I mean: when you type ``1 2 + .'' to the interpreter, the interpreter does NOT read them one by one, but compiles them to a function of which the function-body is ``1 2 + .'', and call the function.
01:32:57 <xyh> I think this is called incremental-compile in other languages (such as Ocaml and some Scheme implementations), it is to let the interpreter works as a compiler but looks like an interpreter.
01:33:04 <xyh> this is wished, for in this kind implementation, one does not have to handle some key words such as "if" & "then" twice, once for "if" & "then" inside function definitions, once for "if" & "then" outside function definitions.
01:33:38 <xyh> subroutine threaded has what special features ? I ll be back in two hours and view the channel log :)
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01:33:58 <ttmrichter> Subroutine threading is where a word consists of a series of call instructions.
01:34:03 <ttmrichter> That's pretty much it.
01:36:37 <tangentstorm> i remember seeing something that worked that way, xyh
01:37:15 <tangentstorm> it was a modern forth dialect that supported closures.
01:37:40 <tangentstorm> or at least anonymous functions.
01:40:40 <ttmrichter> Yes.  Closure-like things are made easier if you do subroutine threading.
01:41:15 <ttmrichter> If you give words like <[ and ]> in those scenarios, you can make them do pretty much what xyh was describing quite easily.
01:41:33 <tangentstorm> i believe it, but i don't understand how the threading mode has anything to do with what he's talking about.
01:41:33 <ttmrichter> You make a subroutine, store it somewhere, and push its address on the stack.
01:41:56 <ttmrichter> Well, he seems to want to make EVERYTHING act as if it's implicitly in closures.
01:42:05 <ttmrichter> If I'm understanding him correctly.
01:42:20 <DGASAU> Basically, all modern CL and Scheme implementations perform compilation without calling it some special term.
01:45:19 <ttmrichter> Oh, Asau is going to start on his "why Forth is evil because it raped his mother" routine again I see.
01:45:23 <ttmrichter> Please, do continue.
01:45:36 <ttmrichter> That routine never gets tiresome.
02:00:39 <tangentstorm> i think the language i was thinking of is http://web.archive.org/web/20140630082850/http://aerosuidae.net/raven.html but i'm not sure because the site is down and the cache isn't complete.
02:01:23 <ttmrichter> Factor has that facility as well, but that's not really a Forth dialect.
02:02:55 <tangentstorm> maybe it's not raven. i'm not sure.
02:03:47 <tangentstorm> pretty sure it was someone who'd written several different forth-like languages. 
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05:36:53 <xyh> ttmrichter: I ll go to re-study the thread-techs, for now all I used is indirect-thread.
05:36:59 <xyh> tangentstorm: about the language you mentioned, anonymous function support is in its TODO-list. closure is for lexical-scope of name-binding, I have supported anonymous function and lexical-scope, but I use "simple direct-graph-processing" instead of closure. "simple direct-graph-processing" is just list with circles, when I need a name-binding, I just make one more circle in the list.
05:37:31 <xyh> I am trying to implement the thing that I mentioned above now. it is ``the right thing'' :) the whole system will be able to get rid of interpreter-semantic, it makes the structure of the system more clear.
05:37:56 <xyh> every function that not only takes arguments from the Argument-stack, but also from the inputed string following that function, should be rewrite. for example "the begin of comment" used to be implemented as a function, now it should be treated specially.
05:39:53 <xyh> and nested function definition must be supported :)
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05:40:59 <DGASAU> ISTR that person who implemented that "raven" stuff.
05:42:32 <DGASAU> xyh: next step is to invent separation of syntax and semantic phases. :)
05:44:53 <xyh> DGASAU: ``separation of syntax and semantic phases'' ? is it a sarcasm ?
05:44:57 <DGASAU> IIRC, the person who implemented "raven" wasn't actually "implementor of many Forth interpreters", it was his diploma or even course project.
05:45:40 <DGASAU> xyh: yes, closer to that.
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