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Merge pull request #7658 from ethereum/inlineAssemblyDocs

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Document variable name restrictions for declarations in inline assembly.
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chriseth 2019-11-07 14:54:59 +01:00 committed by GitHub
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9
docs/060-breaking-changes.rst
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@ -28,6 +28,13 @@ This section lists purely syntactic changes that do not affect the behavior of e
* New reserved keywords: ``virtual``.
* The names of variables declared in inline assembly may no longer end in ``_slot`` or ``_offset``.
* Variable declarations in inline assembly may no longer shadow any declaration outside the inline assembly block.
If the name contains a dot, its prefix up to the dot may not conflict with any declaration outside the inline
assembly block.
Semantic Only Changes
=====================
@ -72,6 +79,8 @@ This section gives detailed instructions on how to update prior code for every b
parameters like so: ``@return value The return value.``. You can mix named and un-named return parameters
documentation so long as the notices are in the order they appear in the tuple return type.
* Choose unique identifiers for variable declarations in inline assembly that do not conflict with declartions outside the inline assembly block.
New Features
============

6
docs/assembly.rst
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@ -439,6 +439,12 @@ for the variable and automatically removed again when the end of the block
is reached. You need to provide an initial value for the variable which can
be just ``0``, but it can also be a complex functional-style expression.
Since 0.6.0 the name of a declared variable may not end in ``_offset`` or ``_slot``
and it may not shadow any declaration visible in the scope of the inline assembly block
(including variable, contract and function declarations). Similarly, if the name of a declared
variable contains a dot ``.``, the prefix up to the ``.`` may not conflict with any
declaration visible in the scope of the inline assembly block.
.. code::
pragma solidity >=0.4.16 <0.7.0;