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Merge pull request #3992 from davesque/improve-abi-spec

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A couple of ABI spec improvements
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chriseth 2018-05-02 15:50:10 +02:00 committed by GitHub
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docs/abi-spec.rst
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@ -77,7 +77,7 @@ of them inside parentheses, separated by commas:
- ``(T1,T2,...,Tn)``: tuple consisting of the types ``T1``, ..., ``Tn``, ``n >= 0``
It is possible to form tuples of tuples, arrays of tuples and so on.
It is possible to form tuples of tuples, arrays of tuples and so on. It is also possible to form zero-tuples (where ``n == 0``).
.. note::
Solidity supports all the types presented above with the same names with the exception of tuples. The ABI tuple type is utilised for encoding Solidity ``structs``.
@ -117,7 +117,7 @@ on the type of ``X`` being
- ``(T1,...,Tk)`` for ``k >= 0`` and any types ``T1``, ..., ``Tk``
``enc(X) = head(X(1)) ... head(X(k-1)) tail(X(0)) ... tail(X(k-1))``
``enc(X) = head(X(1)) ... head(X(k)) tail(X(1)) ... tail(X(k))``
where ``X(i)`` is the ``ith`` component of the value, and
``head`` and ``tail`` are defined for ``Ti`` being a static type as
@ -126,7 +126,7 @@ on the type of ``X`` being
and as
``head(X(i)) = enc(len(head(X(0)) ... head(X(k-1)) tail(X(0)) ... tail(X(i-1))))``
``head(X(i)) = enc(len( head(X(1)) ... head(X(k)) tail(X(1)) ... tail(X(i-1)) ))``
``tail(X(i)) = enc(X(i))``
otherwise, i.e. if ``Ti`` is a dynamic type.
@ -137,7 +137,7 @@ on the type of ``X`` being
- ``T[k]`` for any ``T`` and ``k``:
``enc(X) = enc((X[0], ..., X[k-1]))``
``enc(X) = enc((X[1], ..., X[k]))``
i.e. it is encoded as if it were a tuple with ``k`` elements
of the same type.