Remove flag from trailing comma tests and move experimental parts to separate file

Author: mateusrodriguesxyz

test/Parse/trailing-comma-conditions.swift renamed to test/Parse/trailing-comma-experimental.swift

@@ -1,6 +1,8 @@
 // RUN: %target-typecheck-verify-swift -disable-experimental-parser-round-trip -enable-experimental-feature TrailingComma
 
-func f(_ block: (Bool) -> Bool) -> Bool { block(true) }
+// REQUIRES: asserts
+
+// Condition List
 
 func testConditionListTrailingComma() {
     if true, { }
@@ -48,4 +50,36 @@ func testConditionListTrailingComma() {
     guard true, , else { return } // expected-error {{expected expression in conditional}}
 
     guard true, { return } // expected-error {{expected 'else' after 'guard' condition}}
+
+    while true, { }
+}
+
+// Switch Case Pattern List
+
+switch 5 {
+    case 1, 2,:
+        break
+    default:
+        break
+}
+
+protocol P1 { }
+protocol P2 { }
+
+// Generic Where Clause List
+
+struct S1<T1, T2,> where T1: P1, T2: P2, { }
+
+protocol P3 {
+  func f<T1, T2>(a: T1, b: T2) where T1: P1, T2: P2, // expected-error {{expected type}} 
+}
+
+// Inheritance Clause List
+
+struct S2: P1, P2, { }
+
+struct S3<T>: P1, P2, where T: Equatable { }
+
+protocol P4 {
+    associatedtype T: P1, P2, // expected-error {{expected type}} 
 }

test/Parse/trailing-comma.swift

@@ -1,10 +1,10 @@
-// RUN: %target-swift-frontend -parse -verify %s -disable-experimental-parser-round-trip -enable-experimental-feature TrailingComma
+// RUN: %target-swift-frontend -parse -verify %s -disable-experimental-parser-round-trip
 
 // Tuple and Tuple Pattern
 
 let _ = (a: 1, b: 2, c: 3,)
 
-let (_, _,) = (1,)
+let (_, _,) = (0,1,)
 
 // Arguments and Parameters
 
@@ -33,23 +33,10 @@ protocol P<T1, T2> {
     associatedtype T2
 }
 
-// Generic Where Clause List
-
-struct S<T1, T2, T3,> where T1: P1, T2: P2, { }
-
 // Closure Capture List
 
 let _ = { [obj1, obj2,] in }
 
-// Switch Case List
-
-switch number {
-    case 1, 2,:
-        break
-    default:
-        break
-}
-
 // Attributes
 
 @Foo(a, b, c,) struct S { }
@@ -75,6 +62,33 @@ macro OptionSet<RawType>() = #externalMacro(module: "SwiftMacros", type: "Option
 
 // Availability Spec List
 
-if #available(iOS 15, watchOS 9, *,) { }
+if #unavailable(iOS 15, watchOS 9,) { }
+
+// The following cases are only supported with the 'TrailingComma' experimental feature flag enabled
+ 
+// Switch Case Pattern List
+
+switch number {
+    case 1, 2,: // expected-error {{expected pattern}} 
+        break
+    default:
+        break
+}
+
+// Generic Where Clause List
+
+struct S<T1, T2, T3,> where T1: P1, T2: P2, { } // expected-error {{expected type}} 
+
+// Inheritance Clause List
+
+struct S: P1, P2, P3, { } // expected-error {{expected type}} 
+
+struct S<T>: P1, P2, P3, where T: Equatable { } // expected-error {{expected type}} expected-error {{expected '{' in struct}} 
+
+// Condition List
+
+if true, { } // expected-error {{expected '{' after 'if' condition}} 
+
+guard true, else { } // expected-error {{expected expression in conditional}} 
 
-if #unavailable(iOS 15, watchOS 9,) { }
+while true, { } // expected-error {{expected '{' after 'while' condition}}