#2976. Add constant expressions tests.Part 3. (#3026)

Add constant expressions tests.Part 3.

LanguageFeatures/Static-access-shorthand/constant_expression_A10_t12.dart

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+// Copyright (c) 2024, 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 A static member shorthand expression should be a potentially
+/// constant expression if the corresponding explicit static member plus
+/// selectors expression would be, which currently means that it's a potentially
+/// constant expression if and only if it's a constant expression.
+///
+/// @description Checks that a static member shorthand expression can be used in
+/// a right operand of a constant `e1 == e2` expression.
+/// @author [email protected]
+
+// SharedOptions=--enable-experiment=enum-shorthands
+
+import '../../Utils/expect.dart';
+
+class C {
+  static const C answer = const C(42);
+  final int v;
+  const C(this.v);
+}
+
+mixin M on C {
+  static const M answer = const MC(42);
+}
+
+class MC extends C with M {
+  const MC(super.v);
+}
+
+enum E {
+  e0;
+  static const E answer = E.e0;
+}
+
+extension type const ET(int v) {
+  static const ET answer = const ET(42);
+}
+
+main() {
+  const b1 = C(42) == .answer;
+  Expect.isTrue(b1);
+  const b2 = (MC(42) as M) == .answer;
+  Expect.isTrue(b2);
+  const b3 = E.e0 == .answer;
+  Expect.isTrue(b3);
+  const b4 = ET(42) == .answer;
+  Expect.isTrue(b4);
+}

LanguageFeatures/Static-access-shorthand/constant_expression_A10_t13.dart

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+// Copyright (c) 2024, 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 A static member shorthand expression should be a potentially
+/// constant expression if the corresponding explicit static member plus
+/// selectors expression would be, which currently means that it's a potentially
+/// constant expression if and only if it's a constant expression.
+///
+/// @description Checks that it is compile-time error if a non-constant static
+/// member shorthand expression is used in a right operand of a constant
+/// `e1 == e2` expression.
+/// @author [email protected]
+
+// SharedOptions=--enable-experiment=enum-shorthands
+
+class C {
+  static C answer = const C(42);
+  final int v;
+  const C(this.v);
+}
+
+mixin M on C {
+  static const M answer = const MC(42);
+}
+
+class MC extends C with M {
+  const MC(super.v);
+}
+
+enum E {
+  e0;
+  static E answer = E.e0;
+}
+
+extension type const ET(int v) {
+  static ET answer = const ET(42);
+}
+
+main() {
+  const b1 = C(42) == .answer;
+//                    ^
+// [analyzer] unspecified
+// [cfe] unspecified
+  const b2 = (MC(42) as M) == .answer;
+//                            ^
+// [analyzer] unspecified
+// [cfe] unspecified
+  const b3 = E.e0 == .answer;
+//                   ^
+// [analyzer] unspecified
+// [cfe] unspecified
+  const b4 = ET(42) == .answer;
+//                     ^
+// [analyzer] unspecified
+// [cfe] unspecified
+}

LanguageFeatures/Static-access-shorthand/constant_expression_A10_t14.dart

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+// Copyright (c) 2024, 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 A static member shorthand expression should be a potentially
+/// constant expression if the corresponding explicit static member plus
+/// selectors expression would be, which currently means that it's a potentially
+/// constant expression if and only if it's a constant expression.
+///
+/// @description Checks that a static member shorthand expression can be used in
+/// a right operand of a constant `e1 != e2` expression.
+/// @author [email protected]
+
+// SharedOptions=--enable-experiment=enum-shorthands
+
+import '../../Utils/expect.dart';
+
+class C {
+  static const C answer = const C(42);
+  final int v;
+  const C(this.v);
+}
+
+mixin M on C {
+  static const M answer = const MC(42);
+}
+
+class MC extends C with M {
+  const MC(super.v);
+}
+
+enum E {
+  e0;
+  static const E answer = E.e0;
+}
+
+extension type const ET(int v) {
+  static const ET answer = const ET(42);
+}
+
+main() {
+  const b1 = C(42) != .answer;
+  Expect.isFalse(b1);
+  const b2 = (MC(42) as M) != .answer;
+  Expect.isFalse(b2);
+  const b3 = E.e0 != .answer;
+  Expect.isFalse(b3);
+  const b4 = ET(42) != .answer;
+  Expect.isFalse(b4);
+}

LanguageFeatures/Static-access-shorthand/constant_expression_A10_t15.dart

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+// Copyright (c) 2024, 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 A static member shorthand expression should be a potentially
+/// constant expression if the corresponding explicit static member plus
+/// selectors expression would be, which currently means that it's a potentially
+/// constant expression if and only if it's a constant expression.
+///
+/// @description Checks that it is compile-time error if a non-constant static
+/// member shorthand expression is used in a right operand of a constant
+/// `e1 != e2` expression.
+/// @author [email protected]
+
+// SharedOptions=--enable-experiment=enum-shorthands
+
+class C {
+  static C answer = const C(42);
+  final int v;
+  const C(this.v);
+}
+
+mixin M on C {
+  static const M answer = const MC(42);
+}
+
+class MC extends C with M {
+  const MC(super.v);
+}
+
+enum E {
+  e0;
+  static E answer = E.e0;
+}
+
+extension type const ET(int v) {
+  static ET answer = const ET(42);
+}
+
+main() {
+  const b1 = C(42) != .answer;
+//                    ^
+// [analyzer] unspecified
+// [cfe] unspecified
+  const b2 = (MC(42) as M) != .answer;
+//                            ^
+// [analyzer] unspecified
+// [cfe] unspecified
+  const b3 = E.e0 != .answer;
+//                   ^
+// [analyzer] unspecified
+// [cfe] unspecified
+  const b4 = ET(42) != .answer;
+//                     ^
+// [analyzer] unspecified
+// [cfe] unspecified
+}

LanguageFeatures/Static-access-shorthand/constant_expression_A10_t16.dart

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+// Copyright (c) 2024, 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 A static member shorthand expression should be a potentially
+/// constant expression if the corresponding explicit static member plus
+/// selectors expression would be, which currently means that it's a potentially
+/// constant expression if and only if it's a constant expression.
+///
+/// @description Checks that a static member shorthand expression can be used in
+/// a constant `e1 ? e2 : e3` expression.
+/// @author [email protected]
+
+// SharedOptions=--enable-experiment=enum-shorthands
+
+import '../../Utils/expect.dart';
+
+class C {
+  static const C one = const C(1);
+  static const C two = const C(2);
+  final int v;
+  const C(this.v);
+}
+
+mixin M on C {
+  static const M one = const MC(1);
+  static const M two = const MC(2);
+}
+
+class MC extends C with M {
+  const MC(super.v);
+}
+
+enum E {
+  e1, e2;
+  static const E one = E.e1;
+  static const E two = E.e2;
+}
+
+extension type const ET(int v) {
+  static const ET one = const ET(1);
+  static const ET two = const ET(2);
+}
+
+main() {
+  const C c = 2 > 1 ? .one : .two;
+  Expect.identical(const C(1), c);
+  const M m = 2 < 1 ? .one : .two;
+  Expect.identical(const MC(2), m);
+  const E e = 2 > 1 ? .one : .two;
+  Expect.identical(E.e1, e);
+  const ET et = 2 < 1 ? .one : .two;
+  Expect.identical(const ET(2), et);
+}

LanguageFeatures/Static-access-shorthand/constant_expression_A10_t17.dart

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+// Copyright (c) 2024, 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 A static member shorthand expression should be a potentially
+/// constant expression if the corresponding explicit static member plus
+/// selectors expression would be, which currently means that it's a potentially
+/// constant expression if and only if it's a constant expression.
+///
+/// @description Checks that it is a compile-time error if a non-constant static
+/// member shorthand expression is used in a constant `e1 ? e2 : e3` expression.
+/// @author [email protected]
+
+// SharedOptions=--enable-experiment=enum-shorthands
+
+class C {
+  static C one = const C(1);
+  static const C two = const C(2);
+  final int v;
+  const C(this.v);
+}
+
+mixin M on C {
+  static M one = const MC(1);
+  static const M two = const MC(2);
+}
+
+class MC extends C with M {
+  const MC(super.v);
+}
+
+enum E {
+  e1, e2;
+  static const E one = E.e1;
+  static E two = E.e2;
+}
+
+extension type const ET(int v) {
+  static const ET one = const ET(1);
+  static ET two = const ET(2);
+}
+
+main() {
+  const C c = 2 > 1 ? .one : .two;
+//                    ^
+// [analyzer] unspecified
+// [cfe] unspecified
+  const M m = 2 < 1 ? .one : .two;
+//                    ^
+// [analyzer] unspecified
+// [cfe] unspecified
+  const E e = 2 > 1 ? .one : .two;
+//                           ^
+// [analyzer] unspecified
+// [cfe] unspecified
+  const ET et = 2 < 1 ? .one : .two;
+//                             ^
+// [analyzer] unspecified
+// [cfe] unspecified
+}

LanguageFeatures/Static-access-shorthand/constant_expression_A10_t18.dart

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+// Copyright (c) 2024, 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 A static member shorthand expression should be a potentially
+/// constant expression if the corresponding explicit static member plus
+/// selectors expression would be, which currently means that it's a potentially
+/// constant expression if and only if it's a constant expression.
+///
+/// @description Checks that a static member shorthand expression can be used in
+/// a constant `e1 ?? e2` expression.
+/// @author [email protected]
+
+// SharedOptions=--enable-experiment=enum-shorthands
+
+import '../../Utils/expect.dart';
+
+class C {
+  static const C one = const C(1);
+  static const C? two = null;
+  final int v;
+  const C(this.v);
+}
+
+mixin M on C {
+  static const M one = const MC(1);
+  static const M? two = null;
+}
+
+class MC extends C with M {
+  const MC(super.v);
+}
+
+enum E {
+  e1, e2;
+  static const E one = E.e1;
+  static const E? two = null;
+}
+
+extension type const ET(int v) {
+  static const ET one = const ET(1);
+  static const ET? two = null;
+}
+
+main() {
+  const C c = .two ?? .one;
+  Expect.identical(const C(1), c);
+  const M m = .two ?? .one;
+  Expect.identical(const MC(1), m);
+  const E e = .two ?? .one;
+  Expect.identical(E.e1, e);
+  const ET et = .two ?? .one;
+  Expect.identical(const ET(1), et);
+
+  const c2 = (C(1) as C?) ?? .one;
+  Expect.identical(const C(1), c2);
+  const m2 = (MC(1) as M?) ?? .one;
+  Expect.identical(const MC(1), m2);
+  const e2 = (E.e1 as E?) ?? .one;
+  Expect.identical(E.e1, e2);
+  const et2 = (ET(1) as ET?) ?? .one;
+  Expect.identical(const ET(1), et2);
+}