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Clarify evaluation of arguments to require.
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@ -615,7 +615,13 @@ The following example shows how to use an error string together with ``revert``
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}
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}
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The two syntax options are equivalent, it's developer preference which to use.
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If you provide the reason string directly, then the two syntax options are equivalent, it is the developer's preference which one to use.
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.. note::
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The ``require`` function is evaluated just as any other function.
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This means that all arguments are evaluated before the function itself is executed.
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In particular, in ``require(condition, f())`` the function ``f`` is executed even if
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``condition`` is true.
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The provided string is :ref:`abi-encoded <ABI>` as if it were a call to a function ``Error(string)``.
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In the above example, ``revert("Not enough Ether provided.");`` returns the following hexadecimal as error return data:
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