From e8b07a33e085136a70b68f5172153c8e557c89f9 Mon Sep 17 00:00:00 2001
From: Martin Odersky <odersky@gmail.com>
Date: Mon, 9 Nov 2015 15:25:34 +0100
Subject: Better diagnosis from completions printer

Track starts and ends of completions using indentation.
---
 src/dotty/tools/dotc/core/SymDenotations.scala | 12 ++++++++++++
 1 file changed, 12 insertions(+)

(limited to 'src/dotty/tools/dotc/core/SymDenotations.scala')

diff --git a/src/dotty/tools/dotc/core/SymDenotations.scala b/src/dotty/tools/dotc/core/SymDenotations.scala
index a74cf0000..feb0c22df 100644
--- a/src/dotty/tools/dotc/core/SymDenotations.scala
+++ b/src/dotty/tools/dotc/core/SymDenotations.scala
@@ -163,6 +163,11 @@ object SymDenotations {
     }
 
     private def completeFrom(completer: LazyType)(implicit ctx: Context): Unit = {
+      if (completions ne noPrinter) {
+        completions.println(i"${"  " * indent}completing ${if (isType) "type" else "val"} $name")
+        indent += 1
+      }
+      indent += 1
       if (myFlags is Touched) throw CyclicReference(this)
       myFlags |= Touched
 
@@ -173,6 +178,11 @@ object SymDenotations {
           completions.println(s"error while completing ${this.debugString}")
           throw ex
       }
+      finally
+        if (completions ne noPrinter) {
+          indent -= 1
+          completions.println(i"${"  " * indent}completed $name in $owner")
+        }
       // completions.println(s"completed ${this.debugString}")
     }
 
@@ -1872,4 +1882,6 @@ object SymDenotations {
   }
 
   private val AccessorOrLabel = Accessor | Label
+
+  private var indent = 0 // for completions printing
 }
-- 
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