Add previousValue to Logic
#385
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Description & Motivation
In testbenches, it can be useful to see the "previous" value of a signal before a clock edge when sampling something, e.g. for modelling hardware. This PR includes a
previousValueontoLogicthat shows the value of a signal before the most recentSimulator.tick.Related Issue(s)
N/A
Testing
Added new tests
Backwards-compatibility
No
Documentation
API docs yes