Imported Upstream version 5.10.0.69

Former-commit-id: fc39669a0b707dd3c063977486506b6793da2890

mcs/errors/cs0029-42.cs

@@ -0,0 +1,10 @@
+// CS0029: Cannot implicitly convert type `string' to `int'
+// Line: 8
+
+class C
+{
+	void Exists (int _)
+	{
+		_ = "2";
+	}	
+}

mcs/errors/cs0103-18.cs

@@ -0,0 +1,10 @@
+// CS0103: The name `_' does not exist in the current context
+// Line: 8
+
+class C
+{
+	void Test ()
+	{
+		_.ToString ();
+	}
+}

mcs/errors/cs1502-11.cs

@@ -1,11 +0,0 @@
-// CS1502: The best overloaded method match for `string.String(char*)' has some invalid arguments
-// Line: 8
-
-class C
-{
-	static string Prop {
-		get {
-			return new string ("s");
-		}
-    }
-}

mcs/errors/cs1644-60.cs

@@ -0,0 +1,11 @@
+// CS1644: Feature `discards' cannot be used because it is not part of the C# 6.0 language specification
+// Line: 9
+// Compiler options: -langversion:6
+
+class X
+{
+	int Test ()
+	{
+		_ = 2;
+	}
+}

mcs/errors/cs8183.cs

@@ -0,0 +1,11 @@
+// CS8183: Cannot infer the type of implicitly-typed discard
+// Line: 9
+// Compiler options: -langversion:7.2
+
+class X
+{
+	public static void Main ()
+	{
+		_ = default;
+	}
+}

mcs/errors/cs8184.cs

@@ -0,0 +1,10 @@
+// CS8184: A deconstruction cannot mix declarations and expressions on the left-hand-side
+// Line: 8
+
+class X
+{
+	public static void Main ()
+	{
+		(int a, b) = (1, 2);
+	}
+}

mcs/errors/cs8207.cs

@@ -0,0 +1,19 @@
+// CS8207: An expression tree cannot contain a discard
+// Line: 11
+
+using System;
+using System.Linq.Expressions;
+
+class X
+{
+	void Test ()
+	{
+		Expression<Func<bool>> e = () => TryGetValue (out _);
+	}
+
+	bool TryGetValue (out int arg)
+	{
+		arg = 3;
+		return true;
+	}
+}

mcs/errors/cs8209.cs

@@ -0,0 +1,10 @@
+// CS8209: Cannot assign void to a discard
+// Line: 8
+
+class C
+{
+	public static void Main ()
+	{
+		_ = Main ();
+	}
+}

mcs/errors/cs8323.cs

@@ -0,0 +1,15 @@
+// CS8323: Named argument `str' is used out of position but is followed by positional argument
+// Line: 9
+// Compiler options: -langversion:7.2
+
+class X
+{
+	public static void Main ()
+	{
+		Test (str: "", "");
+	}
+
+	static void Test (int arg, string str)
+	{
+	}
+}

mcs/errors/cs8324.cs

@@ -0,0 +1,12 @@
+// CS8324: Named argument specifications must appear after all fixed arguments have been specified in a dynamic invocation
+// Line: 10
+// Compiler options: -langversion:7.2
+
+class C
+{
+	void M ()
+	{
+		dynamic d = new object ();
+		d.M (arg: 1, "");
+	}
+}