Re: [boost] Interest for a perl6-like-junctions-class?

From: Andy Little (andy_at_[hidden])
Date: 2005-08-06 14:06:25

"David Abrahams" <dave_at_[hidden]> wrote in message 
news:u64ujvtre.fsf_at_boost-consulting.com...
> "Andy Little" <andy_at_[hidden]> writes:
>
>> The use of the dummy expression |frobnicates| is a poor substitute
>> for a user defined operator.
>
> Best we can do today.  And it's not bad, once you understand how the
> library works.  Just like in Boost.Lambda  a+b doesn't add anything:
> it builds a function object.  Just like in Boost.Spirit the operators
> are used for parsing.

The  inbuilt operator you choose to subvert  influences how the expression is 
evaluated of course:

#define OP1  |frobnicates|
#define OP2 *frobnicates*

int a=0,b=0;
double c=0.,d=0.;
a+c OP1 b+d;
a+c OP2 b+d;

regards
Andy Little