Sorry, I really meant underscore. Anyway, tilda is indeed discussed
as a possible concatenation operator.
It makes indeed sense to use the same sign for the unary
conversion to string and the binary concatenation. Also
the underscore was less than ideal because it is used for
identifiers. So that meant that it had to be surrounded by
There are very long threads in p6l about operators in general
and concatenation in particular. Indeed, the status of
underscore as concatenation character is contested and
tilda seems the main contendant but that does not
seem a done thing.