Re: silly question: prefix vs postfix ops

Alex Colvin <alexc@TheWorld.com>
Wed, 5 Mar 2008 22:02:05 +0000 (UTC)

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[3 earlier articles]
Re: silly question: prefix vs postfix ops gah@ugcs.caltech.edu (glen herrmannsfeldt) (2008-03-03)
Re: silly question: prefix vs postfix ops haberg_20080207@math.su.se (Hans Aberg) (2008-03-03)
Re: silly question: prefix vs postfix ops marcov@stack.nl (Marco van de Voort) (2008-03-03)
Re: silly question: prefix vs postfix ops gah@ugcs.caltech.edu (glen herrmannsfeldt) (2008-03-04)
Re: silly question: prefix vs postfix ops dot@dotat.at (Tony Finch) (2008-03-04)
Re: silly question: prefix vs postfix ops rpboland@gmail.com (Ralph Boland) (2008-03-04)
Re: silly question: prefix vs postfix ops alexc@TheWorld.com (Alex Colvin) (2008-03-05)
Re: silly question: prefix vs postfix ops DrDiettrich1@aol.com (Hans-Peter Diettrich) (2008-03-06)
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From: Alex Colvin <alexc@TheWorld.com>
Newsgroups: comp.compilers
Date: Wed, 5 Mar 2008 22:02:05 +0000 (UTC)
Organization: The World : www.TheWorld.com : Since 1989
References: 08-03-012 08-03-015
Keywords: syntax, design
Posted-Date: 05 Mar 2008 21:05:12 EST

>Why not, you could have array indexing prefix or infix. In mathematics
>indices are placed before, above, below, inside... where it pleases the
>writer.


For example,


In C*, data-parallel C, parallel data is indexed on the left by virtual
processor number.
[p]n /* parallel n */


Ordinary C arrays are indexed on the right as usual. Parallel arrays can
sport both,


[p]a[i] /* parallel a[i] */


As to whether array indexing is prefix or postfix, remember that in C,
indexing is commutative
a[i] == i[a]


--
mac the naof


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