Implicit multiplication involving a suffix operator

[christianp]

I keep writing $n`? $v, which currently gives a "missing operator" error. I should write $n`? * $v.

The expression n!x also has this problem.

So, the parser should insert an implicit multiplication symbol following a suffix operator.

[christianp]

There is an ambiguity, because ! can be a prefix or postfix operator, so a!b could be either (a!)*b or a*(!b).

[christianp]

I've decided to go with preferring the postfix version.

The equivalent problem with prefix operators still exists, but I had a look at how they're produced, and I think there are lots more potential ambiguities if I dig any deeper. At the moment, a prefix op token can only be produced following punctuation or a non-postfix op. Adding in implicit multiplication would lead to loads of ambiguities. For example, does a-b represent (a)-(b), or a * (-b)?