alias restriction??!

[Steven Schveighoffer]

On 7/19/20 4:21 PM, Carl Sturtivant wrote:
> On Sunday, 19 July 2020 at 17:06:14 UTC, Paul Backus wrote:
>> Also, letting aliases refer to expressions essentially allows AST 
>> macros in through the back door. Consider the following example:
>>
>> [...]
> 
> Perhaps what's needed is something more that is less than allowing 
> aliases for expressions in the wide sense you suggest here.

I agree. Something not yet mentioned is that aliases provide direct 
access to the symbols for the purposes of looking at attributes -- 
something that a wrapper function doesn't provide.

The question is: how do you restrict it to explicit data items within a 
specific aggregate without parsing arbitrary expressions?

-Steve