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That's right. But I prefer to decorate each error as it comes back from the callee, writing what I was trying to do that failed. This gives a human readable tra
by dullgiulio 9y ago
That's right. But I prefer to decorate each error as it comes back from the callee, writing what I was trying to do that failed. This gives a human readable trace of the problem, and also a unique signature for the error itself.
- masklinn 9y ago> But I prefer to decorate each error as it comes back from the callee That's trivially feasible and still shorter than the Go version: a <- decorate (squareRoot x) b <- decorate (log a) c <- decorate (log b) Outside of the do context, your return value is just that, a value, you can manipulate it using the language's regular tooling. And you can decorate the do context itself if you want the same decoration for all calls in the block.