#993. Pointer.elementAt() tests added

LibTest/ffi/Pointer/elementAt_A01_t02.dart

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+/*
+ * Copyright (c) 2021, the Dart project authors.  Please see the AUTHORS file
+ * for details. All rights reserved. Use of this source code is governed by a
+ * BSD-style license that can be found in the LICENSE file.
+ */
+/**
+ * @assertion Pointer<T> elementAt(int index)
+ *  Pointer arithmetic (takes element size into account).
+ *  This method must be invoked with a compile-time constant T.
+ *  Does not accept dynamic invocations -- where the type of the receiver is
+ *  dynamic.
+ *
+ * @description Checks that this method implements pointer arithmetic
+ * @author sgrekhov@unipro.ru
+ */
+import "dart:ffi";
+import '../ffi_utils.dart';
+import '../../../Utils/expect.dart';
+
+void main() {
+  Pointer<IntPtr> p1 = calloc<IntPtr>(3);
+  try {
+    Expect.isTrue(p1.elementAt(1).address - p1.address == 4 ||
+        p1.elementAt(2).address - p1.elementAt(1).address == 8);
+  } finally {
+    calloc.free(p1);
+  }
+}

LibTest/ffi/Pointer/elementAt_A01_t03.dart

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+/*
+ * Copyright (c) 2021, the Dart project authors.  Please see the AUTHORS file
+ * for details. All rights reserved. Use of this source code is governed by a
+ * BSD-style license that can be found in the LICENSE file.
+ */
+/**
+ * @assertion Pointer<T> elementAt(int index)
+ *  Pointer arithmetic (takes element size into account).
+ *  This method must be invoked with a compile-time constant T.
+ *  Does not accept dynamic invocations -- where the type of the receiver is
+ *  dynamic.
+ *
+ * @description Checks that this method implements pointer arithmetic
+ * @author sgrekhov@unipro.ru
+ */
+import "dart:ffi";
+import '../ffi_utils.dart';
+import '../../../Utils/expect.dart';
+
+void main() {
+  Pointer<Pointer<Int8>> p1 = calloc<Pointer<Int8>>(3);
+  try {
+    Expect.isTrue(p1.elementAt(1).address - p1.address == 4 ||
+        p1.elementAt(2).address - p1.elementAt(1).address == 8);
+  } finally {
+    calloc.free(p1);
+  }
+}

LibTest/ffi/Pointer/elementAt_A01_t04.dart

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+/*
+ * Copyright (c) 2021, the Dart project authors.  Please see the AUTHORS file
+ * for details. All rights reserved. Use of this source code is governed by a
+ * BSD-style license that can be found in the LICENSE file.
+ */
+/**
+ * @assertion Pointer<T> elementAt(int index)
+ *  Pointer arithmetic (takes element size into account).
+ *  This method must be invoked with a compile-time constant T.
+ *  Does not accept dynamic invocations -- where the type of the receiver is
+ *  dynamic.
+ *
+ * @description Checks that this method implements pointer arithmetic
+ * @author sgrekhov@unipro.ru
+ */
+import "dart:ffi";
+import '../ffi_utils.dart';
+import '../../../Utils/expect.dart';
+
+class MyStruct extends Struct {
+  @Int8()
+  external int x;
+  @Float()
+  external double y;
+}
+
+void main() {
+  Pointer<MyStruct> p1 = calloc<MyStruct>(2);
+  try {
+    Expect.isTrue(p1.elementAt(1).address - p1.elementAt(0).address > 0);
+  } finally {
+    calloc.free(p1);
+  }
+}

LibTest/ffi/Pointer/elementAt_A02_t02.dart

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+/*
+ * Copyright (c) 2021, the Dart project authors.  Please see the AUTHORS file
+ * for details. All rights reserved. Use of this source code is governed by a
+ * BSD-style license that can be found in the LICENSE file.
+ */
+/**
+ * @assertion Pointer<T> elementAt(int index)
+ *  Pointer arithmetic (takes element size into account).
+ *  This method must be invoked with a compile-time constant T.
+ *  Does not accept dynamic invocations -- where the type of the receiver is
+ *  dynamic.
+ *
+ * @description Checks that this method must be invoked with a compile-time
+ * constant T
+ * @author sgrekhov@unipro.ru
+ * @issue 45149
+ */
+import "dart:ffi";
+import '../ffi_utils.dart';
+
+void main() {
+  Pointer<Int64> p1 = calloc<Int64>(3);
+  try {
+    Pointer<Opaque> p2 = new Pointer.fromAddress(p1.address);
+    p2.elementAt(1);
+//  ^^^^^^^^^^^^^^^
+// [analyzer] unspecified
+// [cfe] unspecified
+  } finally {
+    calloc.free(p1);
+  }
+}

LibTest/ffi/Pointer/elementAt_A02_t03.dart

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+/*
+ * Copyright (c) 2021, the Dart project authors.  Please see the AUTHORS file
+ * for details. All rights reserved. Use of this source code is governed by a
+ * BSD-style license that can be found in the LICENSE file.
+ */
+/**
+ * @assertion Pointer<T> elementAt(int index)
+ *  Pointer arithmetic (takes element size into account).
+ *  This method must be invoked with a compile-time constant T.
+ *  Does not accept dynamic invocations -- where the type of the receiver is
+ *  dynamic.
+ *
+ * @description Checks that this method must be invoked with a compile-time
+ * constant T
+ * @author sgrekhov@unipro.ru
+ * @issue 45150
+ */
+import "dart:ffi";
+import '../ffi_utils.dart';
+
+void main() {
+  Pointer<Int64> p1 = calloc<Int64>(3);
+  try {
+    Pointer<Handle> p2 = new Pointer.fromAddress(p1.address);
+    p2.elementAt(1);
+//  ^^^^^^^^^^^^^^^
+// [analyzer] unspecified
+// [cfe] unspecified
+  } finally {
+    calloc.free(p1);
+  }
+}

LibTest/ffi/Pointer/elementAt_A02_t04.dart

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+/*
+ * Copyright (c) 2021, the Dart project authors.  Please see the AUTHORS file
+ * for details. All rights reserved. Use of this source code is governed by a
+ * BSD-style license that can be found in the LICENSE file.
+ */
+/**
+ * @assertion Pointer<T> elementAt(int index)
+ *  Pointer arithmetic (takes element size into account).
+ *  This method must be invoked with a compile-time constant T.
+ *  Does not accept dynamic invocations -- where the type of the receiver is
+ *  dynamic.
+ *
+ * @description Checks that this method must be invoked with a compile-time
+ * constant T
+ * @author sgrekhov@unipro.ru
+ */
+import "dart:ffi";
+import '../ffi_utils.dart';
+
+void main() {
+  Pointer<Int64> p1 = calloc<Int64>(3);
+  try {
+    Pointer<Array<Int8>> p2 = new Pointer.fromAddress(p1.address);
+    p2.elementAt(1);
+//  ^^^^^^^^^^^^^^^
+// [analyzer] unspecified
+// [cfe] unspecified
+  } finally {
+    calloc.free(p1);
+  }
+}

LibTest/ffi/Pointer/elementAt_A02_t05.dart

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+/*
+ * Copyright (c) 2021, the Dart project authors.  Please see the AUTHORS file
+ * for details. All rights reserved. Use of this source code is governed by a
+ * BSD-style license that can be found in the LICENSE file.
+ */
+/**
+ * @assertion Pointer<T> elementAt(int index)
+ *  Pointer arithmetic (takes element size into account).
+ *  This method must be invoked with a compile-time constant T.
+ *  Does not accept dynamic invocations -- where the type of the receiver is
+ *  dynamic.
+ *
+ * @description Checks that this method must be invoked with a compile-time
+ * constant T
+ * @author sgrekhov@unipro.ru
+ */
+import "dart:ffi";
+import '../ffi_utils.dart';
+
+void main() {
+  Pointer<Int64> p1 = calloc<Int64>(3);
+  try {
+    Pointer<NativeType> p2 = new Pointer.fromAddress(p1.address);
+    p2.elementAt(1);
+//  ^^^^^^^^^^^^^^^
+// [analyzer] unspecified
+// [cfe] unspecified
+  } finally {
+    calloc.free(p1);
+  }
+}

LibTest/ffi/Pointer/elementAt_A02_t06.dart

@@ -0,0 +1,31 @@
+/*
+ * Copyright (c) 2021, the Dart project authors.  Please see the AUTHORS file
+ * for details. All rights reserved. Use of this source code is governed by a
+ * BSD-style license that can be found in the LICENSE file.
+ */
+/**
+ * @assertion Pointer<T> elementAt(int index)
+ *  Pointer arithmetic (takes element size into account).
+ *  This method must be invoked with a compile-time constant T.
+ *  Does not accept dynamic invocations -- where the type of the receiver is
+ *  dynamic.
+ *
+ * @description Checks that this method must be invoked with a compile-time
+ * constant T
+ * @author sgrekhov@unipro.ru
+ */
+import "dart:ffi";
+import '../ffi_utils.dart';
+
+void main() {
+  Pointer<Int64> p1 = calloc<Int64>(3);
+  try {
+    Pointer<NativeFunction> p2 = new Pointer.fromAddress(p1.address);
+    p2.elementAt(1);
+//  ^^^^^^^^^^^^^^^
+// [analyzer] unspecified
+// [cfe] unspecified
+  } finally {
+    calloc.free(p1);
+  }
+}