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1 point by almkglor 6103 days ago | link | parent

Looks interesting. Haven't yet grokked the how-to-use, but then I'm supposed to be working right now, not hacking ^^.

Some nitpicks:

1. scaffold.arc / inst-entity1 uses global variables. Is this deliberate? Why?

2. Personally I would recommend using the following interface to inst-entity1:

  (def inst-entity1 (temname scaffold scaff rinf)
    ...)
  (mac inst-entity (temname scaff . rinf)
    `(inst-entity1 ,temname ,scaff ',scaff ',rinf))
However, I'm not 100% sure why you're using global variables in inst-entity1 in the first place - is there some special reason?

3. docstrings would be nice ^^.

4. The actual code seems to use addtemscaff (not addscaff) and rname (not ename). Or am I looking at the wrong code?

Edit:

5. You seem to be storing the code added by addtemscaff as lists of expressions. Why not store them in a function? That way we can capture variables into an environment instead of forcing the user to always use globals.

6. The (each v tablist.scaffold ...) could probably be transformed to (ontable k v scaffold ...)



1 point by drcode 6103 days ago | link

> 1. scaffold.arc / inst-entity1 uses global variables. Is this deliberate? Why?

The arc eval doesn't seem to support local environments or passing of environments, so this is the only way to pass in anaphoric variables I could find on my first pass. This function could probably be rewritten without eval and with proper scoped anaphoric variables, but given what is happening in the code this requires serious macro-fu. I do sort of know what I'm doing here- The evals and global vars don't make me feel good either... I will clean this up eventually, but won't complain if someone else figures out how to do it first :)

> 2. Personally I would recommend using the following interface to inst-entity1:

  (def inst-entity1 (temname scaffold scaff rinf)
    ...)
  (mac inst-entity (temname scaff . rinf)
    `(inst-entity1 ,temname ,scaff ',scaff ',rinf))
Yeah, you're probably right here... my brain is hurting right now... once it's doing better I will look into it...

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1 point by almkglor 6103 days ago | link

> requires serious macro-fu

True, that's what it looks like. It seems nearer to a macro-defining-macrosystem rather than plain macros, actually. Should be a challenge ^^.

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1 point by treef 6103 days ago | link

Its not always good to have macros writing macros one has to maintain it :)

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1 point by almkglor 6103 days ago | link

Yes, but at least I don't have to write the macro directly, ne? ^^

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1 point by drcode 6103 days ago | link

> 5. You seem to be storing the code added by addtemscaff as lists of expressions. Why not store them in a function? That way we can capture variables into an environment instead of forcing the user to always use globals.

I am planning on adding a command for debugging scaffolds, where the instances of the scaffold are instantiated and pretty-printed to make writing scaffolds less uber-meta. Having functions would prevent this- But you are right that using functions might be the Right Thing. I'll give it some thought.

> 6. The (each v tablist.scaffold ...) could probably be transformed to (ontable k v scaffold ...)

Yes I think you're right. This is definetely "release early, release often" type code, so there's lots of room for improvement.

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1 point by almkglor 6103 days ago | link

> a command for debugging scaffolds, where the instances of the scaffold are instantiated and pretty-printed ... Having functions would prevent this

Looks like we should really be solving the correct problem: make function code pretty-printable ^^. Yes, I think I'll solve this using attachments again... ^^ Go attachments! http://arclanguage.com/item?id=3698

Edit: Which reminds me, I haven't actully grokked this scaffolding thing at all yet. I'll be home in maybe 3-4 hours, hopefully I can get the weekend for this, unless I do something stupid, like track down where the girl I'm trying to see is hiding ^^.

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1 point by drcode 6103 days ago | link

Numbers 1, 2, 4, 5, and 6 are now resolved. (#6 is resolved because my new code makes ontable impossible :-)

I used your advice to store functions- Used properly, this will not affect the debug code I had in mind afterall.

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1 point by drcode 6103 days ago | link

#4 is fixed now.

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