https://issues.dlang.org/show_bug.cgi?id=9591

b2.temp@gmx.com changed:

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                 CC|                            |b2.temp@gmx.com

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https://issues.dlang.org/show_bug.cgi?id=9591

b2.temp@gmx.com changed:

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             Status|NEW                         |RESOLVED
         Resolution|---                         |WONTFIX

--- Comment #1 from b2.temp@gmx.com ---
std.typetuple doesn't exist anymore and the idea had never been expressed in a pull request.

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https://issues.dlang.org/show_bug.cgi?id=9591

Steven Schveighoffer <schveiguy@yahoo.com> changed:

           What    |Removed                     |Added
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             Status|RESOLVED                    |REOPENED
                 CC|                            |schveiguy@yahoo.com
         Resolution|WONTFIX                     |---

--- Comment #2 from Steven Schveighoffer <schveiguy@yahoo.com> ---
std.typetuple was moved to std.meta, so the request is still valid.

We have ApplyLeft and ApplyRight, which take a template as the first parameter, and combined with staticMap, could work as long as the parameters are reversed (the template comes last). Having something that applies a single parameter (or even multipe ones) to a list of templates would be useful as well, and is difficult to do directly.

However, I don't think we need a specific function, a helper like this would work:

template ApplyWith(Args...)
{
   alias ApplyWith = ApplyLeft!(Args[$-1], Args[0 .. $-1]);
}

alias T = staticMap!(ApplyLeft!(ApplyWith, string), leftJustify, center,
rightJustify);

void main()
{
   foreach(f; T)
      writeln(f("hello", 20));
}

It's not perfect. The resulting T isn't a tuple of instantiated templates, it's a tuple of ApplyLeft aliases, awaiting instantiation.

But a helper like the above would be useful. Is there an "Instantiate" template that could be used in place of ApplyLeft inside the ApplyWith template? That might be more proper.

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https://issues.dlang.org/show_bug.cgi?id=9591

--- Comment #3 from Steven Schveighoffer <schveiguy@yahoo.com> ---
(In reply to Steven Schveighoffer from comment #2)
> Is there an "Instantiate"
> template that could be used in place of ApplyLeft inside the ApplyWith
> template? That might be more proper.

There is, it's just private: https://github.com/dlang/phobos/blob/master/std/meta.d#L1670

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https://issues.dlang.org/show_bug.cgi?id=9591

Steven Schveighoffer <schveiguy@yahoo.com> changed:

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           Keywords|                            |pull

--- Comment #4 from Steven Schveighoffer <schveiguy@yahoo.com> ---
PR: https://github.com/dlang/phobos/pull/5738

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https://issues.dlang.org/show_bug.cgi?id=9591

--- Comment #5 from Steven Schveighoffer <schveiguy@yahoo.com> ---
As David Nadlinger pointed out, this can already be solved with Instantiate and ApplyRight. I added a PR to make Instantiate public, and add the solution to this issue as a documented unit test.

https://github.com/dlang/phobos/pull/5739

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https://issues.dlang.org/show_bug.cgi?id=9591

--- Comment #6 from github-bugzilla@puremagic.com ---
Commits pushed to master at https://github.com/dlang/phobos

https://github.com/dlang/phobos/commit/f3cec8bdd38529848c5c1bed1f5a2a9817e07203
Fix issue 9591 - Allow Instantiate template to be public, give example
of how Instantiate + ApplyRight can be used to solve the problem.

https://github.com/dlang/phobos/commit/efae08503d9a83d6abdf29270e4c363c393e53de Merge pull request #5739 from schveiguy/fix9591

Fix issue 9591 - Allow Instantiate template to be public

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https://issues.dlang.org/show_bug.cgi?id=9591

--- Comment #7 from github-bugzilla@puremagic.com ---
Commits pushed to stable at https://github.com/dlang/phobos

https://github.com/dlang/phobos/commit/f3cec8bdd38529848c5c1bed1f5a2a9817e07203 Fix issue 9591 - Allow Instantiate template to be public, give example

https://github.com/dlang/phobos/commit/efae08503d9a83d6abdf29270e4c363c393e53de Merge pull request #5739 from schveiguy/fix9591

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https://issues.dlang.org/show_bug.cgi?id=9591

Basile-z <b2.temp@gmx.com> changed:

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