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* signalName: returns the chirrtl name of the signal
* pathName: returns the full path name of the signal from the top module
* parentPathName: returns the full path of the signal's parent module instance from the top module
* parentModName: returns the signal's parent **module(not instance)** name.
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* Make "def width" a private API; expose isWidthKnown instead
Resolves #256.
Since width was used to determine whether getWidth would succeed, I added
def isWidthKnown: Boolean
but another option would be to expose something like
def widthOption: Option[Int]
...thoughts?
* Document getWidth/isWidthKnown
* Add widthOption for more idiomatic Scala manipulation of widths
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The API allowed this before, but not safely, as users could create
name conflicts. This exposes the pre-deduplication/sanitization
naming API, and closes the other one.
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It's not entirely clear what the FIRRTL implementation supports, so
I'm using the ANSI C requirements for the time being.
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Deprecating toBits removes the capability to cast an arbitrary
type to UInt. While it's still possible to do so using asBits.asUInt,
this creates boilerplate. (asBits is almost never useful itself.)
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For Chisel nodes defined in Module class-level values of type Option or
Iterable, we can still use reflection to assign names based on the name
of the value. This works for arbitrary nesting of Option and Iterable so
long as the innermost type is HasId. Note that this excludes Maps which
always have an innermost type of Tuple2[_,_].
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Clean up Scala code, and use +& to generate a lot less FIRRTL
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Closes #229
h/t @sdtwigg @davidbiancolin
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