Implicit casts with generic arrays

I've looked into cutting back on the implicit casts to text, which 
exposed the following little gem.

The expressions

'abc' || 34
34 || 'abc'

would no longer work, with the following error message:

ERROR:  22P02: array value must start with "{" or dimension information

That's because the best matches are now respectively

anyarray || anyelement
anyelement || anyarray

Now either this is just too bad and users of a system with reduced casts 
to text will have to live with this odd error message, or coercing any 
old unknown constant to anyarray isn't such a good idea.

Comments?

-- 
Peter Eisentraut
http://developer.postgresql.org/~petere/