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From: "REH" <bogus@nowhere.net>
Newsgroups: comp.lang.ada,comp.lang.c++,comp.realtime,comp.software-eng
Subject: Re: [OT] Re: Teaching new tricks to an old dog (C++ -->Ada)
Date: Fri, 11 Mar 2005 15:21:32 -0500
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Date: 2005-03-11T15:21:32-05:00
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"Dr. Adrian Wrigley" <amtw@linuxchip.demon.co.uk.uk.uk> wrote in message
news:pan.2005.03.11.20.06.33.572481@linuxchip.demon.co.uk.uk.uk...
> >>> * subprograms inside subprograms.  I think it would be great for use
> >>> with the STL (i.e., using a local function with std::foreach)
> >>
> >> Agree strongly.
> >
> > This will be part of the next standard, I hope. Still i do not believe
it to
> > be esential for use.
>
> It is sometimes handy to use the C preprocessor for local functions
>
That would not work in the example above, i.e., for use as the operation
given to STL algorithms.  Besides, inline is better for "quick" functions
than the preprocessor.

The closest thing I've seen in C++ is a locally define class with operator
() defines, but:

1) All the compilers I have used usually choke on this, especially with
optimization turned on (I don't know what the standard actually says about
doing this, though).

2) To access variables from "outer scopes" you would have to send them in
through the constructor.