Stories
Slash Boxes
Comments
NOTE: use Perl; is on undef hiatus. You can read content, but you can't post it. More info will be forthcoming forthcomingly.

All the Perl that's Practical to Extract and Report

use Perl Log In

Log In

[ Create a new account ]

chromatic (983)

chromatic
  (email not shown publicly)
http://wgz.org/chromatic/

Blog Information [technorati.com] Profile for chr0matic [technorati.com]

Journal of chromatic (983)

Monday August 10, 2009
08:38 PM

Perl 6 Design Minutes for 15 July 2009

[ #39440 ]

The Perl 6 design team met by phone on 15 July 2009. Larry, Allison, Patrick, and chromatic attended.

Larry:

  • continuing to think about the semantics of use versus need
  • started splitting out the implementations thereof in STD
  • continued to chart how Captures versus Parcels behave
  • clarifying the interface to the trait mod routines
  • no extra, optional argument
  • any incoming Pair argument becomes a mandatory, named parameter
  • Pair smartmatch was too ambitious
  • depowered it slightly
  • it only works in the boolean sense
  • "if you call this method, does it return something that is true?"
  • matches with the truth of the Pair argument
  • you can interrogate an attribute to see if it's true or false; nothing beyond that
  • in reference to filetest operators... to see if a file is a particular size, you have to call the real method
  • removed the StatBuf type
  • now try to drive it off the IO abstraction
  • fixed the less than awesome error message from using the null pattern in STD
  • that straightens out a few related error messages
  • otherwise answering messages and playing traffic cop

Allison:

  • working on install tickets for Parrot
  • some is simple patch review
  • some is tracking down the source of problems
  • lots of just an accumulation of little bugs
  • I think Partcl now works
  • looking at Ruby next

Patrick:

  • curious to know if Partcl works on the platforms Andy Dougherty reported as problematic

Allison:

  • probably has the same issue with spaces in compiler/linker options

Patrick:

  • worked on the -G bugs which afflicted Rakudo
  • they seem to be gone now
  • lots of people helped there
  • very pleased with that
  • found a bug in Parrot's tracing runcore: caused a few problems
  • played with a patch to get rid of STRING comparisons in Parrot's isa
  • right now, Parrot does a lot of STRING comparisons
  • they're very expensive; creates a lot of STRINGs for that
  • my patch improves Rakudo's spectests by 11%
  • causes a problem with roles in Rakudo
  • will wait until Jonathan returns before applying it
  • found and fixed a bug in Parrot where it created PMCProxy objects for PIR classes
  • that was a result of the STRING comparisons
  • more work to unify PGE with S05
  • added the null and fail tokens
  • removed several deprecated builtins
  • otherwise doing bugfixes and responding to questions

c:

  • worked on Parrot GC problems
  • still working on pluggable runcores

Patrick:

  • for selecting candidates during MMD, the presence of a required named parameter is a filter
  • is the opposite true?
  • is the absence of a named parameter where a named argument is present also a filter?

Larry:

  • required named parameters count as constraints in signatures
  • if there's not a mandatory named parameter
  • if it's an ordinary named parameter
  • it's optional
  • it's not a constraint

Patrick:

  • if a named parameter is not present and you passed a name argument, it's going to fail anyway

Larry:

  • yes
  • it has to succeed in binding; that's the final test

Patrick:

  • would it short-circuit that in any way?

Larry:

  • we restructured the spec
  • we classified things by nominal typing
  • anything constrained is tighter than anything unconstrained
  • you can have strict, nominal typing without constraints
  • it'll report ambiguous resolution at compile time
  • constraints require runtime testing
  • constraints resolve in order of declaration
  • anything without a constraint can come afterward, as the default case
  • we hope it works out that way
  • seems closer to DWIMmy than what we had before
  • it generalizes by not being constrained or by being placed last
The Fine Print: The following comments are owned by whoever posted them. We are not responsible for them in any way.
 Full
 Abbreviated
 Hidden
More | Login | Reply
Loading... please wait.