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ABI documentation clarifications

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Mathias Baumann 2019-08-06 17:17:34 +02:00
parent 4182033264
commit 7234e59e07
1 changed files with 6 additions and 6 deletions
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docs/abi-spec.rst
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@ -141,19 +141,19 @@ on the type of ``X`` being
``enc(X) = head(X(1)) ... head(X(k)) tail(X(1)) ... tail(X(k))`` ``enc(X) = head(X(1)) ... head(X(k)) tail(X(1)) ... tail(X(k))``
where ``X = (X(1), ..., X(k))`` and where ``X = (X(1), ..., X(k))`` and
``head`` and ``tail`` are defined for ``Ti`` being a static type as ``head`` and ``tail`` are defined for ``Ti`` as follows:
if ``Ti`` is static:
``head(X(i)) = enc(X(i))`` and ``tail(X(i)) = ""`` (the empty string) ``head(X(i)) = enc(X(i))`` and ``tail(X(i)) = ""`` (the empty string)
and as otherwise, i.e. if ``Ti`` is dynamic:
``head(X(i)) = enc(len( head(X(1)) ... head(X(k)) tail(X(1)) ... 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))`` ``tail(X(i)) = enc(X(i))``
otherwise, i.e. if ``Ti`` is a dynamic type.
Note that in the dynamic case, ``head(X(i))`` is well-defined since the lengths of Note that in the dynamic case, ``head(X(i))`` is well-defined since the lengths of
the head parts only depend on the types and not the values. Its value is the offset the head parts only depend on the types and not the values. The value of ``head(X(i))`` is the offset
of the beginning of ``tail(X(i))`` relative to the start of ``enc(X)``. of the beginning of ``tail(X(i))`` relative to the start of ``enc(X)``.
- ``T[k]`` for any ``T`` and ``k``: - ``T[k]`` for any ``T`` and ``k``: