Hello Again All!

I made a parser

I made a parser for ~ATH in addition to the interpreter. I might make the interpreter use the parser at some point in the future, or I might not. If I made the interpreter use the parser, the code for the interpreter would probably be a little cleaner, and possibly a little faster.

The parser is available from my github.

To use it, call tokenize on the text, and then read_all_from on the result of tokenize.

The output will be a list of lists

https://github.com/drocta/TILDE-ATH-Parser

(haven't updated lately because of other unrelated projects, and also other reasons that aren't necessary to describe)

Learn ~ATH turned 1 today!

yaaaay!

So I think that my explanations of things hasn't been very clear so far, and while I can't promise that they will improve, I do intend to teach programming in person at my school, which might help me to know how to make this tutorial better. Maybe, maybe not. 

May things go well!

I am so bad at updating. (and a side note)

I am still intending to update this.

but I am not good at time management.

I have like 2 hours of free time after school, (because of certain inefficiencies on my part) so that's my stupid excuse.

I am working on writing some responses to some requests for clarification, and then I will do the second part of the converter TO binary.

the print command can have the end of a loop in.

The contents of the print command can be executed.

so if you say:

import blah A; import bleh B; ~ATH(A){ ~ATH(B){ print heh } ~ATH(NULL){ print giant frogs alert; B.DIE(); } }  

it should print

"heh } ~ATH(NULL){ print giant frogs alert giant frogs alert"

this of course, is not particularly useful as far as I can tell, except possibly for quines, and possibly obfuscation. but really, is it possibly to write anything in ~ATH that isn't obfuscated?

speaking of not obfuscated, I have started working on adding a feature for user defined functions. I have it pretty much worked out how it will work, but I am not sure how I want to make the user DEFINE the functions. so I haven't been doing NOTHING with regards to this.

This blog still exists

Hi, I haven’t posted much here in quite some time.

So, is this blog abandoned? I wouldn’t say so. I intend to post more ~ATH content here at some point. I have other projects and obligations, which is why I’ve been not doing as much with it recently (”recently”: understatement of the year), but if anyone has any questions about drocta ~ATH, or would like to request that I do something in particular with it, I think I’ll probably respond within a reasonable amount of time.

Right now though I thought I would link to two blogs that I think you are likely to appreciate if you like this blog.

The first is @sbahjsic http://sbahjsic.tumblr.com/ which is for a programming language and assorted connected software meant to be, well, sbahjsic . like sweet bro and h---- jeff. (Warning though, that blog has some javascript alerts when you view it. Also it has moving parts which might be bad if you get nauseous easily or something? idk.) The blog theme there is a work of art to behold. This is likely to appeal because it is also a homestuck related programming language, and also it is great.

The second is @tilde-he which is where I post most of my non ~ATH related tumblr posts. This is somewhat likely to maybe appeal because it is by the same person as this blog (me).

Again, if you have any questions or comments about my version of ~ATH, or, really, any version that you can point out, feel free to send them, and I’ll try to respond within a reasonable amount of time.

Alright, cheers

I am aware that this will probably not get answered but for what its worth: Is it possible to access the 'variables' generated within the ~ATH code externally? I.e. if I import an alive object would it be possible to use the python code to test if that object is alive or not (and potentially change that)? I have taken a look at the code but am unsure if it is possible or even coded in that manner. Any response is appreciated but I will not mind and understand if this goes unanswered.

Hey,Assuming I understand what you mean by your question:Yes it would be possible to do that with not too much of a change to the code, but no the code wasn’t designed specifically to facilitate that.The way the code is written, the python function “evalScript” takes two arguments, the first of which is the text of the drocta ~ATH code to run, and the second is a drocta ~ATH object to give as input to the script.In this function, there is a python variable called ATHVars which stores a dictionary of variable names as the keys, and the values being the ~ATH object that is currently pointed to by the variable. If you want to have python do something with a ~ATH object that a particular ~ATH variable points to, you could use this dictionary in order to get that object.At the end of the “evalScript” function, it returns the ~ATH object stored in the return_obj variable. This can be set by sayinganyothervariable.DIE(theObjectYouWantToReturn);So, one way that might work to do what you are wanting to do, is in the ~ATH script you want to run, you would first take all the objects you want to check if they are alive at the end of the script, use BIFURCATE or SPLIT .... ah phooey I never actually put split in this version I guess? ok repeated use of BIFURCATE it is then I guess.Anyway, you would use BIFURCATE to get an object which is the combination of all the objects you are interested in, in whatever way you put them together, and then you make it so that that object is the one you return at the end.If you have one of the ~ATH objects in python, the way to check if it is alive or not is to check the theobjectinquestion.living attribute (see bif.py for this part if you want).

You said “if I import an alive object“, which I’m not sure if might suggest that I haven’t explained how the “import” statement works in this clearly enough.

“import” is a bit of a misnomer here. For the most part, “import” is more of a way to declare new objects, not to import existing objects from a libraryIf I set aside a bunch of time to work on this more I would maybe add support for them actually being libraries?---Oh! If you want the python code to inspect (and possibly change) whether the object that a variable currently points to is alive or not while in the middle of the ~ATH script , a good way to do that would probably be to modify the part which it handles calling functions, and make it support calling functions which are written in python and included in a dictionary under some name, similar to how it uses the funCodes dictionary.

However, that might be kind of tricky to do if you uh, weren’t the one to write the code, because the code I wrote is rather messy? I started cleaning it up at one point by starting to write a parser instead of using the terrible regex that it currently uses, but I never finished writing the parser and integrating it into the interpreter. Bler...

I would like to do that at some point. Hmm...

Maybe I should schedule some time to do that? I have had more experience writing parsers and interpreters since then, so it shouldn’t be /that/ hard for me to clean some of this stuff up and add support for functions written in python.

I probably shouldn’t try working on that like, right now, because I have schoolwork I should be getting to, but, hm.

Hey, if you can, could you send me another ask in a few days to remind me to maybe schedule a day on which to write some stuff for this?

Anyway, thanks for asking. I’m happy to answer questions about this.

planned features and feedback.

I am planning two features to add.

one us user defined functions.

the second is, uh, it would let you make an object that would have itself as one of its components or one of the component of one of its components etc.?

the third one I am not sure if I think it is dumb yet, but I was thinking maybe functions being objects that you can bifurcate together to make functions.

which would allow for macros kind of?

which of these three features are good ideas, (as in, for each, it is a good idea)?

@ karkathateseveryonesposts

Anon in that ask was me, not rping as you say but what I meant from computer-exploding code is I was unsure if ~ATH was supposed to crash once running a code like Sollux's.  Also, there couldn't be a syntax error as the program crashes if I press enter with no code on it yet.

Ah! My apologies for my misunderstanding, I interpreted the reference to computer exploding scripts combined with your handle to [ justification for why I misinterpreted snipped for brevity].

You don’t type the script in when you run the program. You need to first save the script as a seperate file, and then when you run the interpreter, type in the filename.

The last bit of the interpreter says like

filename=raw_input() filelink=open(filename,'r') script=filelink.read(-1) result_obj=evalScript(script,NULL_obj) raw_input("press enter to close")

I probably should have made it more clearly ask for a file name instead of just having a prompt with no explanation.

(also, wow, this reminds me that this code was written in python 2.7 and not python 3. Maybe I should update it to use python 3? There’s also many other things about it that ought to be improved but it isn’t high on my priorities..)

My ~ATH keeps crashing whenever I run a non-computer exploding code, or if I press enter. Why is this?

Based on the username which recently followed this blog at the same time as I received this ask (which I won't say what it was because you asked this on anon, and haven't received permission), I'd guess that you may be running a different version of ~ATH than the one I document here :P

Unfortunately, I don't have a specification for the version you have.

If you have such a specification, or the executable for it, I'd be happy to take a look if you could send it to me, haha.

If on the off chance you are using the version I document here, then presumably you have a syntax error or something in your code?

ok, made some small commits...

(no features added, but cleaned up some code and added example programs)

yup.

it has the basis for how I am going to make functions if I make them, and cleaned up the code for BIFURCATEion, and removed some lines that were commented out.

if you want the new version it is on the github.

no real difference when it runs though.

(if something you wrote doesn't work with the new version, try using BIFFURCATE instead of BIFURCATE to use the old code. You probably won't need to, though. It works fine for me. and you probably haven't written anything in it anyway, because you kind of have to uh, want to, I guess)

How exactly would one go about downloading and running your ~ATH interpretation? Where can we download it and what is needed to run it?

“Hi! My interpreter is on my github account [here], along with a number of example files.

To run it, you need to have python 2.7 installed. (Other versions of python 2 may also work. I don’t think it quite works in python 3, but running it through a python 2 to python3 converter should probably give you a working python 3 version)

You can get python 2 at https://www.python.org/downloads/ .

The current version of python 2 is 2.7.13 . Currently that python download page has a link directly to the download on it. (If anyone is reading this post much later than January 1 2016 and the page has changed in the meantime, feel free to send me an ask asking where the current download link for python 2 is).

Once you have python 2 installed, download the interpreter from my github, https://github.com/drocta/TILDE-ATH . There should be a green button labeled “Clone or download”. If you click this, one of the options it will give will be “download ZIP” . Choose this option to download a .zip file of all the files for drocta ~ATH.

Unzip these files into a folder somewhere. Put the .~ATH files that you want to run in the same folder. Use python2 to run the python file interp_2.py . The program will then expect you to type in the filename of the .~ATH file you want to run and then press enter once. It will then load and run the ~ATH program. When it has finished running the program, it will say "press enter to close" . (this is so you can see the output of your ~ATH program before it closes, in case you run it in certain ways.). When you press enter, the python program will finish.

More details on how to run interp_2.py, in case you don’t know how to:(I am assuming you are on windows. if this is not the case, please send me another ask. It should work fine on other OSs, but these instructions for how to run interp_2.py with python might be slightly different)once python 2 is installed, if you open the command line, navigate to the folder with interp_2.py, and type “python interp_2.py” (without spaces), it should run it. Alternatively you can double click on the interp_2.py, it will probably work.One potential problem you might have is if you have python3 installed as well as python2. In this case you have to make sure you run it with the right version of python. If you are using the command line,“C:\Python27\python.exe interp_2.py” instead of “python interp_2.py” should probably work.

If any of this is unclear or you want any more help with this, please do not hesitate to send another ask.

I’m very pleased that this is still interesting for people, and am happy to help!

Is drocta ~ATH case- and whitespace-sensitive? For instance, would "BIFURCATE 2NULL[JUNK,BLAH];" do the same thing as "bifurcate 2NULL [JUNK, BLAH];"? Also, is there a difference between calling .DIE() on an object and setting it to NULL? Your tutorials seem to be written as if there were a difference. And finally, I'm still unsure about what "BIFURCATE [CMP0,ZEROCHAR]D;" and "D.DIE();" are supposed to do in regards to interpreting the user-inputted character.

drocta ~ATH is case sensitive in most cases, and white space sensitive in some cases. line breaks/new lines are not neccessary for example.

if I said "bifurcate 2NUL[JUNK,BLAH]; that would by a typo on my part. It should be BIFURCATE.

if people want I could make it not case sensitive, but currently it is.

there is a VERY IMPORTANT (if subtle) difference between setting a variable to null and calling .DIE on an object.

in drocta ~ATH, there are variables and objects. Every variable "points to" or "references" an object. The object that a variable points to does not necessarily stay the same. if you have some variable "C", and then you say BIFURCATE SOMETHING[C,JUNK];

instead of pointing to what it was pointing to before, it points to the left half of whatever SOMETHING is pointing to.

This doesn't make the object no longer exist however. It might be that no variables point to it anymore, but it still is stored in memory.

More than one variable can point to a given object.

If variable A and B both initially point to the same object, and then you change A so that it points to a different object, B will still point to the object that they were pointing to at first.

so if A and B both point to some object (which is initially alive), and then A is made to point to the object initially pointed to by NULL (which is initially dead), then A will point to an object that is dead, but B will still point to an object that is alive.

In contrast, if D and F are pointing to the same object, which is initially alive, and one says "D.DIE();", the object that D points to will die (become dead). D and F still point to the same object, but this object is now dead. So both D and F point to a dead object.

about the user input part:

BIFURCATE [CMP0,ZEROCHAR]D;D.DIE();

determines some object, temporarily pointed to by D, which has the object pointed to by CMP0 as its left half, and the object pointed to by ZEROCHAR as its right half. It then kills this object.

the purpose of this, is so that if one has some character object (from the input statement), and wants to know if it is '0', then one can determine the object that has the object pointed to by CMP0 as the left half, and the object that you want to test as the right half. If the object you are testing IS '0', then the object that you get should be the same one that you killed, so it should be dead. If it is not '0' but rather, say, 'z' or just some object that doesn't have a corresponding character, it will result in some other object, which has not been killed, so it is still alive.

I hope I cleared up some of your questions.