> On Sep 9, 2020, at 11:29 AM, Brian Goetz <[email protected]> wrote: > > Gavin points out another corner case here: when the LHS is the `null` literal: > > if (null instanceof String s) { ... } > > Since this is also in the "stupid question" category, it is reasonable to > outlaw it, at least when there's a pattern on the RHS.
One thing to be careful of with "stupid question" errors is that sometimes stupid questions can be useful for experimentation. For example, it's nice that I can go to jshell and see what 'null instance String' does without getting my hand slapped. (I don't think there's a bright line between stupid questions that should be disallowed and those that should are useful. It's a judgement call.)
