Create additional simpler constructors to decrease verbosity of simple control blocks

[mkorbel1]

The default implementation for If, Iff, etc. take lists of Conditionals as inputs, which can be excessively verbose in cases where there is only one Conditional. Adding a special constructor (e.g. something like Iff.s) which takes a single Conditional could make simple code look cleaner.

[quekyj]

Hi @mkorbel1 , maybe I can try on this next.

[quekyj]

Suggested Implementation:

If.s(Logic condition, Conditional then, [orElse])

[orElse] is optional param

Current If Implementation

If(Logic condition, {List<Conditional> then = const [], List<Conditional> orElse = const []})

[quekyj]

counter_test.dart

Sequential.multi([
      SimpleClockGenerator(10).clk,
      reset
    ], [
      If(reset, then: [
        val < 0
      ], orElse: [
        If(en, then: [val < nextVal])
      ])
    ]);

[chykon]

Shouldn't this issue be closed after this (#210) merge?

[mkorbel1]

Yes, you're right, thank you @chykon!