New tests.

svn path=/trunk/mcs/; revision=114740

1 files changed, 57 insertions, 0 deletions

diff --git a/mcs/tests/test-687.cs b/mcs/tests/test-687.cs
new file mode 100755
index 00000000000..b65722957ba
--- /dev/null
+++ b/mcs/tests/test-687.cs
@@ -0,0 +1,57 @@
+using System;
+
+struct XUnit
+{
+	public XUnit(double point)
+	{
+		this.Point = point;
+	}
+
+	double Point;
+
+	public static implicit operator XUnit(double value)
+	{
+		XUnit unit;
+		unit.Point = value;
+		return unit;
+	}
+
+	public static implicit operator double(XUnit value)
+	{
+		return value.Point;
+	}
+}
+
+struct Unit
+{
+	public Unit(double point)
+	{
+		this.Point = point;
+	}
+
+	double Point;
+
+	public static implicit operator Unit(double value)
+	{
+		Unit unit;
+		unit.Point = value;
+		return unit;
+	}
+
+	public static implicit operator double(Unit value)
+	{
+		return value.Point;
+	}
+}
+
+class Test
+{
+	public static int Main()
+	{
+		XUnit xunit = new XUnit();
+		Unit unit = new Unit();
+		Unit uu = unit + xunit;
+		unit += xunit;
+		return 0;
+	}
+}