Re: [perl6/specs] ff11f1: define %%; clarify that % is not quantmod

[Carl Mäsak]

Martin ():
 5. And pretty please could we have infix:%(Str,Capture) as an alias for
 sprintf? (Not that I'm normally a Python fan, but that feature has a
 particularly wholesome appeal about it.)

There's no problem adding this to either your user code or to CORE
today. All the prerequisites are there.

But I doubt it'll end up in CORE, and here's why:

* We have sprintf and .fmt already, and they cover that ecological niche.
* More importantly, infix:% is taken already in mainline Perl 6, by
a mathematical operator, no less. Perl operators in general and Perl 6
operators in particular have been about not mixing meanings of
operators, and if it's a math operator it cannot also be a string
formatting one -- for pretty strong philosophical reasons.

But, again, there's nothing to prevent you from defining a multi
infix:% in your code today, or even package it in a module and make
it re-usable.

// Carl

Re: [perl6/specs] ff11f1: define %%; clarify that % is not quantmod

[Martin D Kealey]

Out of curiosity, I followed this and read through Str.

When I got to the section on sprintf, I found a few things I think need
attention.

1. There isn't any description what the flags do, in particular 'v', which
seems to be a P6 enhancement.

2. Not mentioned are 'hh' (native char), 'j' (native maxint_t) and 'l'
(applied to 's' and 'c', native wchar_t).

3. Logically the 'p' conversion applied to an Object should return the
object identity (.id or whatever that's called now), though applied to
non-objects it should probably still throw an exception.

4. In keeping with named parameters, it seems to me that the 'index' should
be extended to allow a name rather than just an integer. Obviously that
would need the name to be disambiguated by some punctuation such as  or
«».

5. And pretty please could we have infix:%(Str,Capture) as an alias for
sprintf? (Not that I'm normally a Python fan, but that feature has a
particularly wholesome appeal about it.)

-Martin

On Sun, 25 Sep 2011, nore...@github.com wrote:
 Date: Sun, 25 Sep 2011 17:33:22 -0700
 From: nore...@github.com
 To: perl6-language@perl.org
 Subject: [perl6/specs] ff11f1: define %%; clarify that % is not quantmod

   Branch: refs/heads/master
   Home:   https://github.com/perl6/specs

   Commit: ff11f19331bf30327cf729a0f5c9c349caa231c7
   
 https://github.com/perl6/specs/commit/ff11f19331bf30327cf729a0f5c9c349caa231c7
   Author: Larry Wall la...@wall.org
   Date:   2011-09-25 (Sun, 25 Sep 2011)

   Changed paths:
 M S05-regex.pod

   Log Message:
   ---
   define %%; clarify that % is not quantmod

 ingy++ requested a method of stopping optionally after the separator,
 so that's now %% (with some notion of evenly divisible in some kind
 of loose sense).  (Note, if you want to require the separator at the
 end, don't use this construct, just use [x ',']* or such.

 sorear++ requested clarification: % (and %%) are not really quantifier
 modifiers; they modify a quantified atom to insert requirements
 between each iteration of that quantified atom.  Hence any quantifier
 may still take an additional control quantmod in addition to a separator.


   Commit: 6d7f9f1ad5f42fe3e14d44a10834cda869643cc7
   
 https://github.com/perl6/specs/commit/6d7f9f1ad5f42fe3e14d44a10834cda869643cc7
   Author: Larry Wall la...@wall.org
   Date:   2011-09-25 (Sun, 25 Sep 2011)

   Changed paths:
 M S32-setting-library/IO.pod
   M S32-setting-library/Str.pod

   Log Message:
   ---
   Merge branch 'master' of github.com:perl6/specs


 Compare: https://github.com/perl6/specs/compare/d7b5637...6d7f9f1

[perl6/specs] ff11f1: define %%; clarify that % is not quantmod

[noreply]

  Branch: refs/heads/master
  Home:   https://github.com/perl6/specs

  Commit: ff11f19331bf30327cf729a0f5c9c349caa231c7
  
https://github.com/perl6/specs/commit/ff11f19331bf30327cf729a0f5c9c349caa231c7
  Author: Larry Wall la...@wall.org
  Date:   2011-09-25 (Sun, 25 Sep 2011)

  Changed paths:
M S05-regex.pod

  Log Message:
  ---
  define %%; clarify that % is not quantmod

ingy++ requested a method of stopping optionally after the separator,
so that's now %% (with some notion of evenly divisible in some kind
of loose sense).  (Note, if you want to require the separator at the
end, don't use this construct, just use [x ',']* or such.

sorear++ requested clarification: % (and %%) are not really quantifier
modifiers; they modify a quantified atom to insert requirements
between each iteration of that quantified atom.  Hence any quantifier
may still take an additional control quantmod in addition to a separator.


  Commit: 6d7f9f1ad5f42fe3e14d44a10834cda869643cc7
  
https://github.com/perl6/specs/commit/6d7f9f1ad5f42fe3e14d44a10834cda869643cc7
  Author: Larry Wall la...@wall.org
  Date:   2011-09-25 (Sun, 25 Sep 2011)

  Changed paths:
M S32-setting-library/IO.pod
  M S32-setting-library/Str.pod

  Log Message:
  ---
  Merge branch 'master' of github.com:perl6/specs


Compare: https://github.com/perl6/specs/compare/d7b5637...6d7f9f1