On Thu, Dec 30, 2010 at 07:04:11AM -0600, Larry Evans wrote:
> On 12/29/10 22:40, Daryoush Mehrtash wrote:
> > Why do people put ";" in do {}, or "," in data fields, at the
> > beginning of the line?
> > --
> It reflects the parse tree better by putting the
> combining operators (e.g. ';' and ',') at the left
> and their operands (or combined subtrees) indented
> to the right.
I will take this opportunity to mention again a related pet peeve of
mine that I originally griped about ages ago:
http://www.mail-archive.com/[email protected]/msg02231.html
Even nowadays, Haddock deliberately generates the following layout for
long function types:
openTempFile
:: FilePath
-> String
-> IO (FilePath, Handle)
The layout draws special attention to the first argument type, whereas
the other argument types are indistinguishable from the return
type. The following is much clearer:
openTempFile ::
FilePath ->
String ->
IO (FilePath, Handle)
(Possibly with the arrows aligned.)
I can't understand how the "arrows first" convention still lingers so
strongly when it is (to me) so obviously wrong and misleading. Please,
folks, at least pay a thought to what different indentation and line
continuation styles express before adopting one.
Lauri
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