Re: [boost] Tuple library accepted

From: John Max Skaller (skaller_at_[hidden])
Date: 2001-06-29 23:26:21

Peter Dimov wrote:

> > This gets rid of the compile time overhead completely,
> > allows a reasonable limit on the size of tuples,
> > allows important optimisations, and may be mandatory
> > for generalising certain other library components
> > efficiently.
> 
> This would probably be a step in the right direction, but the more important
> issue is how do you get from the function call expression
> 
> f(x, y, z, 5)
> 
> a tuple containing the arguments.
> 
> Writing 10,000 operator()'s doesn't feel right. :-)

        Step 1: you ban operator, [comma], either

                a) completely (prefered)
                b) inside brackets

        Step 2: you define , as tuple constructor:

        x,y,z  -- a triple
OR

        (x,y,z) -- if you only banned , inside brackets

Now:

        f (x,y,z)

is precisely

        f (t)

where t == (x,y,z)

See Felix. This is exactly what I do. It is also exactly
what SML does.

Note: there is no tuple with one element!

-- 
John (Max) Skaller, mailto:skaller_at_[hidden] 
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