1 files changed, 44 insertions, 9 deletions

diff --git a/src/main/scala/chisel3/package.scala b/src/main/scala/chisel3/package.scala
index 0b548683..9a79b109 100644
--- a/src/main/scala/chisel3/package.scala
+++ b/src/main/scala/chisel3/package.scala
@@ -1,3 +1,5 @@
+// See LICENSE for license details.
+
 package object chisel3 {
   import scala.language.experimental.macros
 
@@ -7,10 +9,16 @@ package object chisel3 {
 
 
   type Direction = chisel3.core.Direction
-  val INPUT = chisel3.core.INPUT
-  val OUTPUT = chisel3.core.OUTPUT
-  val NO_DIR = chisel3.core.NO_DIR
-  type Flipped = chisel3.core.Flipped
+  object Input {
+    def apply[T<:Data](target: T): T = chisel3.core.Input(target)
+  }
+  object Output {
+    def apply[T<:Data](target: T): T = chisel3.core.Output(target)
+  }
+  object Flipped {
+    def apply[T<:Data](target: T): T = chisel3.core.Flipped(target)
+  }
+
   type Data = chisel3.core.Data
   val Wire = chisel3.core.Wire
   val Clock = chisel3.core.Clock
@@ -54,17 +62,40 @@ package object chisel3 {
   val when = chisel3.core.when
   type WhenContext = chisel3.core.WhenContext
 
+  /**
+  * These implicit classes allow one to convert scala.Int|scala.BigInt to
+  * Chisel.UInt|Chisel.SInt by calling .asUInt|.asSInt on them, respectively.
+  * The versions .asUInt(width)|.asSInt(width) are also available to explicitly
+  * mark a width for the new literal.
+  *
+  * Also provides .asBool to scala.Boolean and .asUInt to String
+  *
+  * Note that, for stylistic reasons, one should avoid extracting immediately
+  * after this call using apply, ie. 0.asUInt(1)(0) due to potential for
+  * confusion (the 1 is a bit length and the 0 is a bit extraction position).
+  * Prefer storing the result and then extracting from it.
+  */
+  implicit class fromIntToLiteral(val x: Int) extends AnyVal {
+    def U: UInt = UInt(BigInt(x), Width())
+    def S: SInt = SInt(BigInt(x), Width())
 
+    def asUInt() = UInt(x, Width())
+    def asSInt() = SInt(x, Width())
+    def asUInt(width: Int) = UInt(x, width)
+    def asSInt(width: Int) = SInt(x, width)
+  }
+  
   implicit class fromBigIntToLiteral(val x: BigInt) extends AnyVal {
     def U: UInt = UInt(x, Width())
     def S: SInt = SInt(x, Width())
-  }
-  implicit class fromIntToLiteral(val x: Int) extends AnyVal {
-    def U: UInt = UInt(BigInt(x), Width())
-    def S: SInt = SInt(BigInt(x), Width())
+
+    def asUInt() = UInt(x, Width())
+    def asSInt() = SInt(x, Width())
+    def asUInt(width: Int) = UInt(x, width)
+    def asSInt(width: Int) = SInt(x, width)
   }
   implicit class fromStringToLiteral(val x: String) extends AnyVal {
-    def U: UInt = UInt(x)
+    def U: UInt = UInt.Lit(x)
   }
   implicit class fromBooleanToLiteral(val x: Boolean) extends AnyVal {
     def B: Bool = Bool(x)
@@ -79,4 +110,8 @@ package object chisel3 {
     def do_!= (that: BitPat)(implicit sourceInfo: SourceInfo): Bool = that != x
     def do_=/= (that: BitPat)(implicit sourceInfo: SourceInfo): Bool = that =/= x
   }
+
+  val INPUT = chisel3.core.Direction.Input
+  val OUTPUT = chisel3.core.Direction.Output
+  type ChiselException = chisel3.internal.ChiselException
 }