http://d.puremagic.com/issues/show_bug.cgi?id=6715

           Summary: Using a custom pow function for ^^
           Product: D
           Version: D2
          Platform: Other
        OS/Version: Linux
            Status: NEW
          Severity: enhancement
          Priority: P2
         Component: DMD
        AssignedTo: nobody@puremagic.com
        ReportedBy: siegelords_abode@yahoo.com


--- Comment #0 from siegelords_abode@yahoo.com 2011-09-22 11:46:57 PDT ---
I want to use a custom pow function (e.g. the one from the C standard library, or from Tango) instead of the one in std.math, but a^^b is rewritten into std.math.pow(a, b) which makes this difficult to accomplish. I can work around it by using a static method like so:

struct std
{
    struct math
    {
        static auto pow(real a, real b);
    }
}

But I'd rather not have to do that (it breaks std imports, for example). Can we have ^^ rewritten into a simple pow?

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siegelords_abode@yahoo.com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Platform|Other                       |All
         OS/Version|Linux                       |All


--- Comment #1 from siegelords_abode@yahoo.com 2012-04-04 16:01:30 PDT ---
An even better idea occurred to me today, now that UFCS has been introduced. Instead of my original proposal, why not do this:

a^^b

turns into

a.pow(b)

Due to the way properties are looked up this is safer than the original proposal (bad things won't happen if you have variables named 'pow' for example).

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bearophile_hugs@eml.cc changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |bearophile_hugs@eml.cc


--- Comment #2 from bearophile_hugs@eml.cc 2012-04-04 16:17:36 PDT ---
(In reply to comment #0)

> Can we have ^^ rewritten into a simple pow?

Note: I think that currently a^^b is optimized in some special cases by the compiler (like b = 2). A simple function call causes a loss of those handy optimizations.

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--- Comment #3 from siegelords_abode@yahoo.com 2012-12-29 08:08:04 PST ---
(In reply to comment #2)
> (In reply to comment #0)
> 
> > Can we have ^^ rewritten into a simple pow?
> 
> Note: I think that currently a^^b is optimized in some special cases by the compiler (like b = 2). A simple function call causes a loss of those handy optimizations.

I never asked for those optimizations to be disabled. I am solely talking about the cases when ^^ is rewritten as a function.

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