Various rules to keep in mind
Abraham's Rules (source: Wikipedia)
The rules apply to class implementations (components) in the presence of exceptions; they are as follows:
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The strong guarantee: that the operation has either completed successfully or thrown an exception, leaving the program state exactly as it was before the operation started.
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The basic guarantee: that the invariants of the component are preserved, and no resources are leaked. Often referred to as the weak guarantee, because following an exception the system is left in a safe but unknown state.
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The no-throw guarantee: that the operation will not throw an exception.
Clarke's Three Laws (source: Wikipedia)
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When a distinguished but elderly scientist states that something is possible, he is almost certainly right; when he states that something is impossible, he is probably wrong.
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The only way of discovering the limits of the possible is to venture a little way past them into the impossible.
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Any sufficiently advanced technology is indistinguishable from magic.
