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Clarify `pure`.

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chriseth 2021-11-08 13:22:23 +01:00
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commit aa4d3cabf1
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docs/contracts/functions.rst
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@ -222,6 +222,9 @@ Pure Functions
-------------- --------------
Functions can be declared ``pure`` in which case they promise not to read from or modify the state. Functions can be declared ``pure`` in which case they promise not to read from or modify the state.
In particular, it should be possible to evaluate a ``pure`` function at compile-time given
only its inputs and ``msg.data``, but without any knowledge of the current blockchain state.
This means that reading from ``immutable`` variables can be a non-pure operation.
.. note:: .. note::
If the compiler's EVM target is Byzantium or newer (default) the opcode ``STATICCALL`` is used, If the compiler's EVM target is Byzantium or newer (default) the opcode ``STATICCALL`` is used,