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by TeMPOraL
4259 days ago
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Restarts are feature of Common Lisp, for which SLIME only draws a powerful interface. Your ability to return a value/retry a call from a given stack frame is just a bunch of default restarts of your CL implementation. What is really awesome is that you can add your own restarts to the interactive debugger. Or have them execute automatically. I recommend those who are not familiar with conditions/restarts to read up a bit on them. This is something like exception handling, but an order of magnitude more powerful. |
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Almost. Restarts and value/retry on a stack frame are mostly unrelated - Restarts are only the UI for implementation specific features. Common Lisp provides no feature to retry an arbitrary stack frame. This is all implementation specific functionality provided by SOME implementations.