Merge pull request #3321 from VladimirNik/sprinter

Add tree-based code generation

1 files changed, 19 insertions, 0 deletions

diff --git a/src/reflect/scala/reflect/api/Printers.scala b/src/reflect/scala/reflect/api/Printers.scala
index 1e0854d171..5bc92d3893 100644
--- a/src/reflect/scala/reflect/api/Printers.scala
+++ b/src/reflect/scala/reflect/api/Printers.scala
@@ -201,6 +201,25 @@ trait Printers { self: Universe =>
    */
   protected def newTreePrinter(out: PrintWriter): TreePrinter
 
+  /**
+   * Renders the code of the passed tree, so that:
+   *  1) it can be later compiled by scalac retaining the same meaning,
+   *  2) it looks pretty.
+   *  At the moment we have handled #1 for unattributed trees and
+   *  later on plan to account for typical idiosyncrasies of the typechecker.
+   *  #2 is more or less okay indentation-wise, but at the moment there's a lot of desugaring
+   *  left in place, and that's what we also plan to improve in the future.
+   *
+   *  @group Printers
+   */
+  def showCode(tree: Tree) = render(tree, newCodePrinter)
+
+  /**
+   * Hook to define what `showCode(...)` means.
+   * @group Printers
+   */
+  protected def newCodePrinter(out: PrintWriter): TreePrinter
+  
   /** Renders internal structure of a reflection artifact as the
    *  visualization of a Scala syntax tree.
    *