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Merge pull request #11636 from ethereum/docs-clarify-struct-members-omitted-by-getters

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[Docs] Clarify that non-byte array struct members are omitted by getters
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chriseth 2021-07-08 15:39:31 +02:00 committed by GitHub
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docs/contracts/visibility-and-getters.rst
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@ -188,16 +188,24 @@ The next example is more complex:
uint a; uint a;
bytes3 b; bytes3 b;
mapping (uint => uint) map; mapping (uint => uint) map;
uint[3] c;
uint[] d;
bytes e;
} }
mapping (uint => mapping(bool => Data[])) public data; mapping (uint => mapping(bool => Data[])) public data;
} }
It generates a function of the following form. The mapping in the struct is omitted It generates a function of the following form. The mapping and arrays (with the
because there is no good way to provide the key for the mapping: exception of byte arrays) in the struct are omitted because there is no good way
to select individual struct members or provide a key for the mapping:
.. code-block:: solidity .. code-block:: solidity
function data(uint arg1, bool arg2, uint arg3) public returns (uint a, bytes3 b) { function data(uint arg1, bool arg2, uint arg3)
public
returns (uint a, bytes3 b, bytes memory e)
{
a = data[arg1][arg2][arg3].a; a = data[arg1][arg2][arg3].a;
b = data[arg1][arg2][arg3].b; b = data[arg1][arg2][arg3].b;
e = data[arg1][arg2][arg3].e;
} }