Re: Spell checking identifiers

From	gah4@u.washington.edu
Newsgroups	comp.compilers
Subject	Re: Spell checking identifiers
Date	2020-06-23 16:51 -0700
Organization	Compilers Central
Message-ID	<20-06-012@comp.compilers> (permalink)
References	<20-06-010@comp.compilers> <20-06-011@comp.compilers>

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On Tuesday, June 23, 2020 at 12:59:35 PM UTC-7, Johann 'Myrkraverk' Oskarsson wrote:

(snip)

> This clang blog specifically mentions Levenshtein,

> http://blog.llvm.org/2010/04/amazing-feats-of-clang-error-recovery.html#spell_checker

> and it looks like what people do is to go through the entire symbol
> table and compute it against the individual erroneous identifier.

> I thought that'd be a bit on the expensive side,

With either constant weighting or character dependent weighting
it is easy to do with dynamic programming. The time is then O(m n)
where m and n are the two lengths.

It seems most obvious to do only variable that are in the appropriate
scope to be misspelled, but I suspect catching variables used out
of scope is also worth doing.  Well, in the latter case, you could
hope that they at least spell them the same.

I think you should turn it off for one character names, though,
even though I suspect those are more likely. Too many false
positives!

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Spell checking identifiers Johann 'Myrkraverk' Oskarsson <johann@myrkraverk.invalid> - 2020-06-24 01:38 +0800
  Re: Spell checking identifiers Johann 'Myrkraverk' Oskarsson <johann@myrkraverk.invalid> - 2020-06-24 03:56 +0800
    Re: Spell checking identifiers gah4@u.washington.edu - 2020-06-23 16:51 -0700
      Re: Spell checking identifiers Johann 'Myrkraverk' Oskarsson <johann@myrkraverk.invalid> - 2020-06-25 22:33 +0800
  Re: Spell checking identifiers "Derek M. Jones" <derek@_NOSPAM_knosof.co.uk.invalid> - 2020-06-24 11:02 +0100
    Re: Spell checking identifiers gah4@u.washington.edu - 2020-06-24 18:28 -0700
      Re: Spell checking identifiers mac <acolvin@efunct.com> - 2020-07-09 16:07 +0000
        Re: Spell checking identifiers Thomas Koenig <tkoenig@netcologne.de> - 2020-07-10 07:12 +0000
          Re: Spell checking identifiers gah4@u.washington.edu - 2020-07-10 13:17 -0700
  Re: Spell checking identifiers Kaz Kylheku <937-053-0959@kylheku.com> - 2020-06-24 18:12 +0000
    Re: Spell checking identifiers Thomas Koenig <tkoenig@netcologne.de> - 2020-06-24 20:08 +0000
      Re: Spell checking identifiers Johann 'Myrkraverk' Oskarsson <johann@myrkraverk.invalid> - 2020-06-25 21:44 +0800
  Re: Spell checking identifiers gautier_niouzes@hotmail.com - 2020-06-24 13:08 -0700

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