Add Printable (#270)

Printable is a new type that changes how printing of Chisel types is represented
It uses an ordered collection rather than a format string and specifiers
Features:
 - Custom String Interpolator for Scala-like printf
 - String-like manipulation of "hardware strings" for custom pretty-printing
 - Default pretty-printing for Chisel data types

1 files changed, 3 insertions, 0 deletions

diff --git a/chiselFrontend/src/main/scala/chisel3/core/Bits.scala b/chiselFrontend/src/main/scala/chisel3/core/Bits.scala
index 57f6d8e0..77a31252 100644
--- a/chiselFrontend/src/main/scala/chisel3/core/Bits.scala
+++ b/chiselFrontend/src/main/scala/chisel3/core/Bits.scala
@@ -250,6 +250,9 @@ sealed abstract class Bits(dirArg: Direction, width: Width, override val litArg:
     res := that
     res
   }
+
+  /** Default print as [[Decimal]] */
+  final def toPrintable: Printable = Decimal(this)
 }
 
 /** Provides a set of operations to create UInt types and literals.