Re: [boost] Re: Tuples Library Formal Review

From: Rainer Deyke (root_at_[hidden])
Date: 2001-06-23 11:41:24

----- Original Message -----
From: "Beman Dawes" <bdawes_at_[hidden]>
To: <boost_at_[hidden]>; <boost_at_[hidden]>
Sent: Saturday, June 23, 2001 8:11 AM
Subject: Re: [boost] Re: Tuples Library Formal Review

> So the rule actually seems something like:
>
>     For by-value indexes such as selecting an element in a container, use
0
> as the base.  Examples: std::vector or std::string.
>
>     For by-name ordinals such as naming operands, arguments, or structure
> members, use 1 as the base.  Examples: std::pair.first, std::bind1st.
>
> On that basis, bind( f, _1, _2 ) seems the correct choice.  It might be
> worth mentioning the above rules in the rationale.

Not really.  In the English language, "first" (also spelled "1st") denotes
the element that has no predecessor.  Zero-based indexing does not change
that.  So zero is the first elements, one is the second elements, etc..
'_1' is the number one, i.e. the second element.

--
Rainer Deyke (root_at_[hidden])
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"In ihren Reihen zu stehen heisst unter Feinden zu kaempfen" - Abigor