Today in tricky diff scenarios: when do you want the inner delimiter to match, and when do you want the outer delimiter to match?
In these examples, lisp looks better with the outer paren matched, whereas rust looks better with the inner brace.
miniblog.
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I haven't used resumable exceptions much at all. I keep coming across scenarios where I wish the current language had them.
Most recent example: writing a tree-walking interpreter with a step counter. I'd love to throw ScriptExceededLimit with an option of resuming.