Merge pull request #4288 from adriaanm/retronym-ticket/9041

SI-9041 Avoid unreported type error with overloading, implicits

2 files changed, 21 insertions, 0 deletions

diff --git a/test/files/neg/t9041.check b/test/files/neg/t9041.check
new file mode 100644
index 0000000000..669e9434e0
--- /dev/null
+++ b/test/files/neg/t9041.check
@@ -0,0 +1,4 @@
+t9041.scala:11: error: could not find implicit value for parameter cellSetter: CellSetter[scala.math.BigDecimal]
+      def setCell(cell: Cell, data: math.BigDecimal) { cell.setCellValue(data) }
+                                                                        ^
+one error found
diff --git a/test/files/neg/t9041.scala b/test/files/neg/t9041.scala
new file mode 100644
index 0000000000..2bdef0d3ae
--- /dev/null
+++ b/test/files/neg/t9041.scala
@@ -0,0 +1,17 @@
+// False negative test, requires overloading in Cell.
+
+trait Cell { def setCellValue(i: Int) = () ; def setCellValue(d: Double) = () }
+
+trait Nope {
+  def f = {
+    trait CellSetter[A] {
+      def setCell(cell: Cell, data: A): Unit
+    }
+    implicit val bigDecimalCellSetter = new CellSetter[math.BigDecimal]() {
+      def setCell(cell: Cell, data: math.BigDecimal) { cell.setCellValue(data) }
+    }
+    implicit class RichCell(cell: Cell) {
+      def setCellValue[A](data: A)(implicit cellSetter: CellSetter[A]) = cellSetter.setCell(cell, data)
+    }
+  }
+}