Imported Upstream version 3.12.0

Former-commit-id: cf92446697332992ec36726e78eb8703e1f259d7

mcs/errors/cs0023-25.cs

@@ -0,0 +1,10 @@
+// CS0023: The `?' operator cannot be applied to operand of type `T'
+// Line: 8
+
+class C
+{
+	static void Foo<T> (T t) where T : struct
+	{
+		var r = t?.ToString ();
+	}
+}

mcs/errors/cs0111-12.cs

@@ -0,0 +1,15 @@
+// CS0111: A member `S3.S3(string)' is already defined. Rename this member or use different parameter types
+// Line: 6
+
+struct S3 (string s)
+{
+	public S3 (string s)
+		: this (1)
+	{
+	}
+
+	public S3 (int i)
+		: this ("")
+	{
+	}
+}

mcs/errors/cs0411-24.cs

@@ -0,0 +1,15 @@
+// CS0411: The type arguments for method `C.Foo<T>(out T)' cannot be inferred from the usage. Try specifying the type arguments explicitly
+// Line: 8
+
+public class C
+{
+	public static void Main ()
+	{
+		Foo (out var y);
+	}
+
+	static void Foo<T> (out T t)
+	{
+		t = default (T);
+	}
+}

mcs/errors/cs0429-5.cs

@@ -1,26 +0,0 @@
-// CS0429: Unreachable expression code detected
-// Line: 24
-// Compiler options: -warnaserror
-
-using System;
-
-struct S
-{
-}
-
-class C
-{
-	public static implicit operator S (C c)
-	{
-		return new S ();
-	}
-}
-
-class Program
-{
-	static void Main ()
-	{
-		C c = new C ();
-		Console.WriteLine (c ?? new S ());
-	}
-}

mcs/errors/cs0516-3.cs

@@ -0,0 +1,9 @@
+// CS0516: Constructor `Sample.Sample()' cannot call itself
+// Line: 6
+
+struct Sample {
+	public Sample ()
+		: this ()
+	{
+	}
+}

mcs/errors/cs0516.cs

@@ -1,9 +1,9 @@
 // CS0516: Constructor `Sample.Sample()' cannot call itself
-// Line: 5
+// Line: 6
 
 class Sample {
-        public Sample (): this () {}
+	public Sample ()
+		: this ()
+	{
+	}
 }
-
-
-

mcs/errors/cs0568.cs

@@ -1,14 +0,0 @@
-// CS0568: Structs cannot contain explicit parameterless constructors
-// Line: 5
-struct A {
-	int a;
-	A () { a = 1; }
-}
-
-class D {
-	static void Main ()
-	{
-		A [] a = new A [10];
-
-	}
-}

mcs/errors/cs0573-2.cs

@@ -0,0 +1,7 @@
+// CS0573: 'S': Structs cannot have instance property or field initializers
+// Line: 6
+
+struct S
+{
+	public int Prop { get; set; } = 3;
+}

mcs/errors/cs0573.cs

@@ -0,0 +1,7 @@
+// CS0573: 'S': Structs cannot have instance property or field initializers
+// Line: 6
+
+struct S
+{
+	int v = 0;
+}

mcs/errors/cs0619-58.cs

@@ -0,0 +1,20 @@
+// CS0619: `S.S()' is obsolete: `ctor'
+// Line: 18
+
+using System;
+
+struct S
+{
+	[Obsolete ("ctor", true)]
+	public S ()
+	{
+	}
+}
+
+class C
+{
+	public static void Main ()
+	{
+		new S ();
+	}
+}

mcs/errors/cs0677-5.cs

@@ -0,0 +1,11 @@
+// CS0677: `X.e': A volatile field cannot be of the type `E'
+// Line: 10
+
+enum E : long
+{
+}
+
+class X
+{
+	volatile E e;
+}

mcs/errors/cs0815-7.cs

@@ -0,0 +1,15 @@
+// CS0815: An implicitly typed local variable declaration cannot be initialized with `void'
+// Line: 8
+
+class X
+{
+	public static void Main ()
+	{
+		Foo (out var x = Main ());
+	}
+
+	static void Foo (out int i)
+	{
+		i = 0;
+	}
+}

mcs/errors/cs0841-5.cs

@@ -0,0 +1,15 @@
+// CS0841: A local variable `x' cannot be used before it is declared
+// Line: 8
+
+class X
+{
+	public static void Main ()
+	{
+		Foo (x, out var x);
+	}
+
+	static void Foo (int arg, out int value)
+	{
+		value = 3;
+	}
+}

mcs/errors/cs1501-18.cs

@@ -0,0 +1,22 @@
+// CS1501: No overload for method `Bar' takes `2' arguments
+// Line: 19
+
+using System;
+
+class T
+{
+	void Foo (int arg, Action a)
+	{
+	}
+
+	void Foo (string title, Action a)
+	{
+	}
+
+	void Bar ()
+	{
+		Foo (arg: 1, a: () => {
+			Bar ("a", "b");
+		});
+	}
+}

mcs/errors/cs1503-17.cs

@@ -0,0 +1,14 @@
+// CS1501: Argument `#1' cannot convert `ref string' expression to type `ref int'
+// Line: 8
+
+class C
+{
+	public static void Main ()
+	{
+		Foo (ref var x = "");
+	}
+
+	static void Foo (ref int i)
+	{
+	}
+}

mcs/errors/cs1525-10.cs

@@ -1,4 +1,4 @@
-// CS1525: Unexpected symbol `ref', expecting `.', `?', `[', `<operator>', or `identifier'
+// CS1525: Unexpected symbol `ref'
 // Line: 8
 
 public class Test

mcs/errors/cs1615-3.cs

@@ -0,0 +1,18 @@
+// CS1615: Argument `#1' does not require `out' modifier. Consider removing `out' modifier
+// Line: 8
+
+public class C
+{
+	public static void Main ()
+	{
+		Foo (out var y);
+	}
+
+	static void Foo (int x)
+	{
+	}
+
+	static void Foo (string x)
+	{
+	}
+}

mcs/errors/cs1644-45.cs

@@ -0,0 +1,10 @@
+// CS1644: Feature `struct parameterless instance constructor' cannot be used because it is not part of the C# 5.0 language specification
+// Line: 12
+// Compiler options: -langversion:5
+
+struct S
+{
+	public S ()
+	{
+	}
+}

mcs/errors/cs1644-47.cs

@@ -0,0 +1,11 @@
+// CS1644: Feature `declaration expression' cannot be used because it is not part of the C# 5.0 language specification
+// Line: 12
+// Compiler options: -langversion:5
+
+class C
+{
+	public static void Main ()
+	{
+		int.TryParse ("0", out var v);
+	}
+}

mcs/errors/cs1736-2.cs

@@ -0,0 +1,16 @@
+// CS1736: The expression being assigned to optional parameter `s' must be a constant or default value
+// Line: 11
+
+struct S
+{
+	public S ()
+	{		
+	}
+}
+
+class X
+{
+	public void Foo (S s = new S ())
+	{
+	}
+}