> Now could not we have 3?
>         3
>         do 1 (ie no preference) but transform the code from _ into := 
> automatically.
> It would be really great in fact

That would be the magic solution :-)

The problem is that it would not be clear how to parse a_1. Is it the
assignment of 1 to a or the access of the variable a_1?

I don't like the proposal of requiring a delimiter before and after an
underscore assignment: (1) there is existing code where this is not
the case, (2) it complicates the scanning significantly, the same
token represents different things depending on context and an extended
lookahead is required to parse it, and (3) it allows that people
continue to use crappy underscore assignments, there will be a mess
forever.

Lukas

-- 
Lukas Renggli
http://www.lukas-renggli.ch

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