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Documentation.
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docs/yul.rst
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docs/yul.rst
@ -885,13 +885,6 @@ the ``dup`` and ``swap`` instructions as well as ``jump`` instructions, labels a
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| gaslimit() | | F | block gas limit of the current block |
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+-------------------------+-----+---+-----------------------------------------------------------------+
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There are three additional functions, ``datasize(x)``, ``dataoffset(x)`` and ``datacopy(t, f, l)``,
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which are used to access other parts of a Yul object.
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``datasize`` and ``dataoffset`` can only take string literals (the names of other objects)
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as arguments and return the size and offset in the data area, respectively.
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For the EVM, the ``datacopy`` function is equivalent to ``codecopy``.
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.. _yul-call-return-area:
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.. note::
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@ -903,6 +896,32 @@ For the EVM, the ``datacopy`` function is equivalent to ``codecopy``.
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The remaining bytes will retain their values as of before the call. If the call fails (it returns ``0``),
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nothing is written to that area, but you can still retrieve the failure data using ``returndatacopy``.
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In some internal dialects, there are additional functions:
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datasize, dataoffset, datacopy
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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The functions ``datasize(x)``, ``dataoffset(x)`` and ``datacopy(t, f, l)``,
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are used to access other parts of a Yul object.
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``datasize`` and ``dataoffset`` can only take string literals (the names of other objects)
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as arguments and return the size and offset in the data area, respectively.
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For the EVM, the ``datacopy`` function is equivalent to ``codecopy``.
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setimmutable, loadimmutable
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^^^^^^^^^^^^^^^^^^^^^^^^^^^
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The functions ``setimmutable("name", value)`` and ``loadimmutable("name")`` are
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used for the immutable mechanism in Solidity and do not nicely map to pur Yul.
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The function ``setimmutable`` assumes that the runtime code of a contract
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is currently copied to memory at offsot zero. The call to ``setimmutable("name", value)``
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will store ``value`` at all points in memory that contain a call to
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``loadimmutable("name")``.
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.. _yul-object:
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Specification of Yul Object
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