From 2c9e506bc32248f9ae4929790a0cb7484a53a66e Mon Sep 17 00:00:00 2001
From: Jason Zaugg <jzaugg@gmail.com>
Date: Thu, 24 Sep 2015 13:22:29 +1000
Subject: Support completion in erroneous string interpolation.

In the code:

```
s"${fooo<CURSOR"
```

The parser treats `fooo` as a interpolator ID for the quote that
we actually intend to end the interpolated string.

Inserting a space (in addition to `__CURSOR__` that we already
patch in to avoid parsing a partial identifier as a keyword),
solves this problem.
---
 test/junit/scala/tools/nsc/interpreter/CompletionTest.scala | 8 ++++++++
 1 file changed, 8 insertions(+)

(limited to 'test')

diff --git a/test/junit/scala/tools/nsc/interpreter/CompletionTest.scala b/test/junit/scala/tools/nsc/interpreter/CompletionTest.scala
index 514f30571e..d00a9bf69a 100644
--- a/test/junit/scala/tools/nsc/interpreter/CompletionTest.scala
+++ b/test/junit/scala/tools/nsc/interpreter/CompletionTest.scala
@@ -51,6 +51,14 @@ class CompletionTest {
     assertEquals(List("prefix_aaa", "prefix_nnn", "prefix_zzz"), completer.complete( """class C { def prefix_nnn = 0; def prefix_zzz = 0; def prefix_aaa = 0; prefix_""").candidates)
   }
 
+  @Test
+  def incompleteStringInterpolation(): Unit = {
+    val intp = newIMain()
+    val completer = new PresentationCompilerCompleter(intp)
+    checkExact(completer, """val x_y_z = 1; s"${x_""", "}\"")("x_y_z")
+    checkExact(completer, """val x_y_z = 1; s"${x_""", "\"")("x_y_z")
+  }
+
   @Test
   def symbolically(): Unit = {
     val intp = newIMain()
-- 
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