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Implement RFC 46: Change Shape.cast(range(1)) to unsigned(0).

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Wanda 2024-02-03 03:13:51 +01:00 • committed by Catherine
parent 1fe7bd010f
commit 089213e19f
3 changed files with 12 additions and 4 deletions
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docs/changes.rst
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@ -36,9 +36,11 @@ Implemented RFCs
.. _RFC 17: https://amaranth-lang.org/rfcs/0017-remove-log2-int.html
.. _RFC 39: https://amaranth-lang.org/rfcs/0039-empty-case.html
.. _RFC 46: https://amaranth-lang.org/rfcs/0046-shape-range-1.html
* `RFC 17`_: Remove ``log2_int``
* `RFC 39`_: Change semantics of no-argument ``m.Case()``
* `RFC 46`_: Change ``Shape.cast(range(1))`` to ``unsigned(0)``
Language changes
@ -52,6 +54,7 @@ Language changes
* Changed: ``Value.matches()`` with no patterns is ``Const(0)`` instead of ``Const(1)``. (`RFC 39`_)
* Changed: ``Signal(range(stop), reset=stop)`` warning has been changed into a hard error and made to trigger on any out-of range value.
* Changed: ``Signal(range(0))`` is now valid without a warning.
* Changed: ``Shape.cast(range(1))`` is now ``unsigned(0)``. (`RFC 46`_)
* Deprecated: :func:`amaranth.utils.log2_int`. (`RFC 17`_)
* Removed: (deprecated in 0.4) :meth:`Const.normalize`. (`RFC 5`_)
* Removed: (deprecated in 0.4) :class:`Repl`. (`RFC 10`_)