feat: Add global settings and custom pprint method; update tests to use new pprint

Author: doofin

src/main/scala/dependentChisel/global.scala

@@ -1,6 +1,9 @@
 package dependentChisel
 
-/* global vars */
+/** global and package-wide settings
+  *
+  * same as package object in scala 2
+  */
 object global {
   val enableWidthCheck = true
   // val enableWidthCheck = false
@@ -12,4 +15,10 @@ object global {
     counter += 1
     counter
   }
+
+  /** my pprint, not show field names
+    *
+    * @param x
+    */
+  def mPPrint[T](x: T) = { pprint.pprintln(x, showFieldNames = false) }
 }

src/test/scala/dependentChisel/astTransformSuite.scala

@@ -25,6 +25,7 @@ import dependentChisel.codegen.sequentialCommands.WeakStmt
 import dependentChisel.codegen.sequentialCommands.VarDecls
 import dependentChisel.codegen.sequentialCommands.Skip
 import dependentChisel.codegen.sequentialCommands.BoolProp
+import dependentChisel.global.mPPrint
 
 /* more tests for parameterized mod*/
 class astTransformSuite extends AnyFunSuite {
@@ -33,7 +34,7 @@ class astTransformSuite extends AnyFunSuite {
       new adder.Adder1prop
     })
 
-    pprint.pprintln(m.moduleData.commandAsTree())
+    mPPrint(m.moduleData.commandAsTree())
     val newAst =
       m.moduleData.transformTree { (ast: TreeNode[Ctrl | Cmds]) =>
         val predicate: Ctrl | Cmds => Boolean = {
@@ -44,7 +45,8 @@ class astTransformSuite extends AnyFunSuite {
         treeTraverse.filterTop(predicate, ast)
       }
 
-    pprint.pprintln(newAst)
+    mPPrint(newAst)
+    assert(newAst.children.length == 1, "filtered AST should have only 1 assertion")
   }
 
 }