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[WIP] [PoC] lib.enum: forward property accesses from enum view to base enum #1426

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[WIP] [PoC] lib.enum: forward property accesses from enum view to base enum #1426

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9 changes: 8 additions & 1 deletion amaranth/lib/enum.py
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Original file line number Diff line number Diff line change
@@ -1,8 +1,9 @@
import builtins
import enum as py_enum
import warnings
import operator

from ..hdl import Value, ValueCastable, Shape, ShapeCastable, Const, SyntaxWarning, Format
from ..hdl import Value, ValueCastable, Shape, ShapeCastable, Const, SyntaxWarning, Format, Array


__all__ = py_enum.__all__ + ["EnumView", "FlagView"]
Expand Down Expand Up @@ -309,6 +310,12 @@ def __ne__(self, other):
raise TypeError("an EnumView can only be compared to value or other EnumView of the same enum type")
return self.target != other.target

def __getattr__(self, name):
if (attr := getattr(self.enum, name, None)) and isinstance(attr, builtins.property):
return Array(attr.fget(self.enum(n))
for n in range(max(e.value for e in self.enum) + 1))[self.target]
raise AttributeError(f"{self!r} has no attribute {name!r}")

def __repr__(self):
return f"{type(self).__qualname__}({self.enum.__qualname__}, {self.target!r})"

Expand Down