Constants, Aliases
Chris Nicholson-Sauls
ibisbasenji at gmail.com
Thu Dec 14 21:02:39 PST 2006
Bill Baxter wrote:
> nazo wrote:
>> Expressions! Expressions! (/ ~.)/
>>
>> I think that the exchange of parameters of alias is necessary from:
>> alias (x*2) exp;
>> to:
>> alias exp=x*2;
>
> I'm all for that. Changing the order I mean, not necessarily aliases
> for expressions. Typedef too. They're all just saying symbol=value
> (where 'value' is a type). But probably it will never change. Alias is
> too closely connected to typedef, and typedef is too closely connected
> to C/C++ for Walter to change its syntax. End result: neither will change.
>
>> And I need alias arguments as syntax sugar like:
>> alias(alias i) exp=i*2;
>> same as:
>> template exp(alias i){
>> alias exp=i*2;
>> }
>
> Hmm, yeh not sure about that. Have to get everyone to swallow the
> expression alias idea first, which will be tough because they've all
> been brainwashed into thinking that #define is the 8th deadly sin. :-P
>
> --bb
Actually its the 9th deadly sin. The 8th would be copy constructors. That said, i'm
actually intrigued by the idea of a expression aliases. I can think of ways they might
well be useful -- and I think changing the syntax to "'alias' ident '=' expr ';'" for this
particular case wouldn't be too bad either. (If nothing else it would make it perfeclty
clear to a parser that this is an expression-alias rather than a symbol-alias.)
-- Chris Nicholson-Sauls
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