5 ms·

The real deal, or is it yet another one of those Potemkin REPLs that append code to a temporary file, compile it and diff standard output?

rany_ 3y ago
Writes to a temporary file and compiles it: https://github.com/alexandru-dinu/igcc/blob/84f68c7056d0d99623e7f0c81cc7cb9bc2a0963a/libigcc/run.py#L186 https://github.com/alexandru-dinu/igcc/blob/84f68c7056d0d996...
- codeflo 3y ago
  The ethics discussion in the neighboring threads aside, this approach has some nasty surprises, and I think it's borderline deceptive that they aren't mentioned more prominently. It's not that rare that my REPL sessions e.g. in Node are > perform expensive computation ... result ... > transform result ... transformed result ... With this approach, the REPL slows down quadratically with session length, and any expensive command at the beginning is executed over and over again. Also, better don't do any file I/O and then continue the session unless you're prepared for the consequences.
  - deleted 3y ago
    [deleted]
  - dataflow 3y ago
    If it's re-executing commands, I agree, it is very deceptive. I had no idea until I read this thread, and this whole time I had been confused about how they were doing this. How does this even work when you have non-idempotent operations?
    - loeg 3y ago
      It doesn't.
guyrap 3y ago
Compiling diffs - but if the user experience is REPL-ish and it can help some people learn the _basics_ of the language, what's wrong with that? (Wrong as in "murdering puppies" wrong, not as in "here are the downsides of X" which I believe exist for every X.)
- pwdisswordfishc 3y ago
  The inefficiency of that process increases electricity usage, the carbon footprint, and therefore contributes to climate change. Which, eventually, murders puppies. Good enough for your arbitrary standard? I would have thought the fact that all preceding side effects will be re-executed each time a new line is written is bad enough, but whatever.
  - jack_pp 3y ago
    Penny wise, pound foolish. By this logic computer games are a genocide in which millions participate every second
    - d-lisp 3y ago
      The true question this types of discussion evoke to me is : Are we able to live ethically ? (Which leads to "What is ethics ?", which eventually leads to " Ethics is nonsensical".)
      - silon42 3y ago
        When my dad saw a queue of tourist cars on a weekend around half of the ring of the capital city he said that if this really causes global warming, this must be banned immediately.
        d-lisp 3y ago
        Well, if you ban tourism, you're on an efficient track of slowing global warming.

rany_ 3y ago

Writes to a temporary file and compiles it: https://github.com/alexandru-dinu/igcc/blob/84f68c7056d0d99623e7f0c81cc7cb9bc2a0963a/libigcc/run.py#L186 https://github.com/alexandru-dinu/igcc/blob/84f68c7056d0d996...

codeflo 3y ago
The ethics discussion in the neighboring threads aside, this approach has some nasty surprises, and I think it's borderline deceptive that they aren't mentioned more prominently. It's not that rare that my REPL sessions e.g. in Node are > perform expensive computation ... result ... > transform result ... transformed result ... With this approach, the REPL slows down quadratically with session length, and any expensive command at the beginning is executed over and over again. Also, better don't do any file I/O and then continue the session unless you're prepared for the consequences.
- deleted 3y ago
  [deleted]
- dataflow 3y ago
  If it's re-executing commands, I agree, it is very deceptive. I had no idea until I read this thread, and this whole time I had been confused about how they were doing this. How does this even work when you have non-idempotent operations?
  - loeg 3y ago
    It doesn't.

guyrap 3y ago

Compiling diffs - but if the user experience is REPL-ish and it can help some people learn the _basics_ of the language, what's wrong with that? (Wrong as in "murdering puppies" wrong, not as in "here are the downsides of X" which I believe exist for every X.)

pwdisswordfishc 3y ago
The inefficiency of that process increases electricity usage, the carbon footprint, and therefore contributes to climate change. Which, eventually, murders puppies. Good enough for your arbitrary standard? I would have thought the fact that all preceding side effects will be re-executed each time a new line is written is bad enough, but whatever.
- jack_pp 3y ago
  Penny wise, pound foolish. By this logic computer games are a genocide in which millions participate every second
  - d-lisp 3y ago
    The true question this types of discussion evoke to me is : Are we able to live ethically ? (Which leads to "What is ethics ?", which eventually leads to " Ethics is nonsensical".)
    - silon42 3y ago
      When my dad saw a queue of tourist cars on a weekend around half of the ring of the capital city he said that if this really causes global warming, this must be banned immediately.
      - d-lisp 3y ago
        Well, if you ban tourism, you're on an efficient track of slowing global warming.