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Exceptions-and-errors.md
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1) We start actively discriminating between recoverable and non-recoverable errors when we discuss things.
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2) We mainly use asserts (particularly `doAssert`) when we are trying to detect non-recoverable errors in the code. Most APIs should be rather strict about their inputs.
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3) We bless the use of both exceptions and error codes for recoverable errors (the more appropriate is selected on a case-by-case basis). We make an active effort to document the recoverable errors of each API when we design it.
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4) We gradually introduce the helpers from my proposal to turn the documented APIs into compiler-checked specifications.
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