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Merge pull request #3609 from RobbieFerguson/patch-1

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Update Delegatecall Description in Docs
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chriseth 2018-04-06 16:39:54 +02:00 committed by GitHub
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docs/units-and-global-variables.rst
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@ -168,6 +168,13 @@ For more information, see the section on :ref:`address`.
to make safe Ether transfers, always check the return value of ``send``, use ``transfer`` or even better:
Use a pattern where the recipient withdraws the money.
.. note::
If storage variables are accessed via a low-level delegatecall, the storage layout of the two contracts
must align in order for the called contract to correctly access the storage variables of the calling contract by name.
This is of course not the case if storage pointers are passed as function arguments as in the case for
the high-level libraries.
.. note::
The use of ``callcode`` is discouraged and will be removed in the future.