19 lines
738 B
Plaintext
19 lines
738 B
Plaintext
|
Currently, a RevertableProperty's Properties always both HasInfo. This
|
||
|
|
means that if a Property NoInfo is updated to be a RevertableProperty, and
|
||
|
|
someplace called ensureProperty on it, that will refuse to compile.
|
||
|
|
|
||
|
|
The workaround is generally to export the original NoInfo property under
|
||
|
|
a different name, so it can still be used with ensureProperty.
|
||
|
|
|
||
|
|
This could be fixed:
|
||
|
|
|
||
|
|
data RevertableProperty i1 i2 where
|
||
|
|
RProp :: Property i1 -> Property i2 -> RevertableProperty i1 i2
|
||
|
|
|
||
|
|
However, needing to write "RevertableProperty HasInfo NoInfo" is quite
|
||
|
|
a mouthful!
|
||
|
|
|
||
|
|
Since only 2 places in the propellor source code currently need to deal
|
||
|
|
with this, it doesn't currently seem worth making the change, unless a less
|
||
|
|
intrusive way can be found.
|