Imported Upstream version 5.10.0.47

Former-commit-id: d0813289fa2d35e1f8ed77530acb4fb1df441bc0

mcs/tests/test-default-01.cs

@@ -0,0 +1,52 @@
+// Compiler options: -langversion:latest
+
+static class X
+{
+	const int c1 = default;
+	const int c2 = default (int);
+
+	public static void Main ()
+	{
+		int a = default;
+		var b = (int) default;
+		const int c = default;
+		var d = new[] { 1, default };
+		dynamic e = default;
+		int f = checked (default);
+		(int a, int b) g = (1, default);
+		var h = 1 != default;
+		var i = default == M4 ();
+	}
+
+	static int M1 ()
+	{
+		return default;
+	}
+
+	static void M2 ()
+	{
+		try {
+			throw new System.Exception ();
+		} catch (System.Exception) when (default) {
+		}
+
+		if (default) {			
+		}
+	}
+
+	static void M3 (int x = default)
+	{
+	}
+
+	static System.Func<int> M4 ()
+	{
+		return () => default;
+	} 
+}
+/*
+enum E
+{
+	A = default,
+	B = default + 1
+}
+*/