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Merge pull request #5435 from fulldecent/patch-9

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Define how inheritance affects storage
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chriseth 2018-11-26 14:46:01 +01:00 committed by GitHub
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@ -15,6 +15,10 @@ Statically-sized variables (everything except mapping and dynamically-sized arra
- If an elementary type does not fit the remaining part of a storage slot, it is moved to the next storage slot.
- Structs and array data always start a new slot and occupy whole slots (but items inside a struct or array are packed tightly according to these rules).
For contracts that use inheritance, the ordering of state variables is determined by the
C3-linearized order of contracts starting with the most base-ward contract. If allowed
by the above rules, state variables from different contracts do share the same storage slot.
.. warning::
When using elements that are smaller than 32 bytes, your contract's gas usage may be higher.
This is because the EVM operates on 32 bytes at a time. Therefore, if the element is smaller