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Message from discussion Syntax for user-defined infix operators
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Rod Pemberton  
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 More options Aug 27 2009, 4:40 am
Newsgroups: comp.lang.misc
From: "Rod Pemberton" <do_not_h...@nohavenot.cmm>
Date: Thu, 27 Aug 2009 04:40:24 -0400
Local: Thurs, Aug 27 2009 4:40 am
Subject: Re: Syntax for user-defined infix operators
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"Dmitry A. Kazakov" <mail...@dmitry-kazakov.de> wrote in message
news:zm5nrfntir2z$.212ivhpy3lmn.dlg@40tude.net...

> On Wed, 26 Aug 2009 20:20:31 GMT, bartc wrote:

> Once I designed a language close to what James proposes with regard to the
> operation dot. (The idea is somehow infectious (:-))

> In particular it has the operations "." and ":", which are used to extract
> substrings (and numeric slices as well). ":" takes the string prefix, "."
> does its suffix. For example:

>    "abcdef".3:2 = "cd"

> it works as follows:

>   ("abcdef".3) = "cdef"
>   "cdef":2 = "cd"

Heh!  You just reminded me of BASIC.  BASIC had/has three substring
operators, i.e., LEFT$, RIGHT$, MID$, and one operator for string
concatenation, +.  Even after years of C programming with the immensely
useful and powerful C string functions, I'm always amazed by how much those
four operations could do in BASIC.  Unfortunately, C needs a function to do
string concatenation, i.e., strcat()...

Rod Pemberton


 
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