Refine @compileTimeOnly

 - Don't default the message, and show it exclusively.
 - Fix cut-and-pasto in the @since tag
 - Be tolerant if the annotaion class is missing, as seems to
   have been the case compiling the continuations plugin.
 - s/\t/  / in the test file to show the errors are positioned
   correctly.
 - Use defensive getOrElse

2 files changed, 9 insertions, 9 deletions

diff --git a/test/files/neg/t6539/Macro_1.scala b/test/files/neg/t6539/Macro_1.scala
index 69bd53fe07..ed52776d95 100644
--- a/test/files/neg/t6539/Macro_1.scala
+++ b/test/files/neg/t6539/Macro_1.scala
@@ -2,9 +2,9 @@ import language.experimental.macros
 import reflect.macros.Context
 
 object M {
-	def m(a: Any, b: Any): Any = macro mImpl
-	def mImpl(c: Context)(a: c.Expr[Any], b: c.Expr[Any]) = a
+  def m(a: Any, b: Any): Any = macro mImpl
+  def mImpl(c: Context)(a: c.Expr[Any], b: c.Expr[Any]) = a
 
-  @reflect.macros.compileTimeOnly("cto may only be used as an argument to m")
-	def cto = 0
+  @reflect.macros.compileTimeOnly("cto may only be used as an argument to " + "m")
+  def cto = 0
 }
diff --git a/test/files/neg/t6539/Test_2.scala b/test/files/neg/t6539/Test_2.scala
index 1569c79788..5a602879ec 100644
--- a/test/files/neg/t6539/Test_2.scala
+++ b/test/files/neg/t6539/Test_2.scala
@@ -1,6 +1,6 @@
 object Test {
-	M.cto // error
-	M.m(M.cto, ()) // error
-	M.m((), M.cto) // okay
-	M.cto // error
-}
\ No newline at end of file
+  M.cto // error
+  M.m(M.cto, ()) // error
+  M.m((), M.cto) // okay
+  M.cto // error
+}