[BuilderTransform] NFC: Adjust variable declaration tests

With AST transform enabled by default most of the previously
invalid declarations became valid (due to SE-0373 being implemented
only for AST transform).

Author: xedin

test/Constraints/result_builder_diags.swift

@@ -6,7 +6,7 @@ enum Either<T,U> {
 }
 
 @resultBuilder
-struct TupleBuilder { // expected-note 3 {{struct 'TupleBuilder' declared here}}
+struct TupleBuilder { // expected-note {{struct 'TupleBuilder' declared here}}
   static func buildBlock() -> () { }
 
   static func buildBlock<T1>(_ t1: T1) -> T1 {
@@ -99,15 +99,13 @@ func testDiags() {
   tuplify(true) { _ in
     17
     let x = 17
-    let y: Int // expected-error{{local variable 'y' requires explicit initializer to be used with result builder 'TupleBuilder'}} {{15-15= = <#value#>}}
+    let y: Int // Ok
     x + 25
   }
 
   tuplify(true) { _ in
     17
-    let y: Int, z: String
-    // expected-error@-1 {{local variable 'y' requires explicit initializer to be used with result builder 'TupleBuilder'}} {{15-15= = <#value#>}}
-    // expected-error@-2 {{local variable 'z' requires explicit initializer to be used with result builder 'TupleBuilder'}} {{26-26= = <#value#>}}
+    let y: Int, z: String // Ok
     y + 25
   }
 

test/Constraints/result_builder_invalid_vars.swift

@@ -0,0 +1,54 @@
+// RUN: %target-typecheck-verify-swift
+
+@resultBuilder
+struct DummyBuilder {
+  static func buildBlock<T>(_ t: T) -> T {
+    return t
+  }
+}
+
+func dummy<T>(@DummyBuilder _: () -> T) {}
+
+dummy {
+  var computedVar: Int { return 123 }
+  ()
+}
+
+dummy {
+  lazy var lazyVar: Int = 123
+  ()
+}
+
+dummy {
+  var observedVar: Int = 123 {
+    // expected-warning@-1 {{variable 'observedVar' was never used; consider replacing with '_' or removing it}}
+    didSet {}
+  }
+
+  ()
+}
+
+dummy {
+  var observedVar: Int = 123 {
+    // expected-warning@-1 {{variable 'observedVar' was never used; consider replacing with '_' or removing it}}
+    willSet {}
+  }
+
+  ()
+}
+
+@propertyWrapper struct Wrapper {
+  var wrappedValue: Int
+}
+
+dummy {
+  @Wrapper var wrappedVar: Int = 123
+  ()
+}
+
+dummy {
+  @resultBuilder var attributedVar: Int = 123
+  // expected-error@-1 {{'@resultBuilder' attribute cannot be applied to this declaration}}
+  // expected-warning@-2 {{variable 'attributedVar' was never used; consider replacing with '_' or removing it}}
+  ()
+}