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// Copyright (c) 2017, 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.
// Test that `covariant` can be parsed (and ignored) by
// dart2js and the VM.
// This test only checks for non-strong mode behavior.
//
// Generally, `covariant` should be ignored, when it is used in the right
// places.
import 'package:expect/expect.dart';
// Top level field may not have a covariant.
// Would be considered a minor (acceptable) bug, if it was accepted here too.
covariant // //# 00: syntax error
int x0;
covariant int covariant; // //# 00b: syntax error
int covariant; // //# 00c: ok
// Getters may never have `covariant`. (Neither on the top-level nor as members)
covariant // //# 01: syntax error
int get x1 => 499;
// Top level setters may not have a covariant.
// Would be considered a minor (acceptable) bug, if it was accepted here too.
void set x2(
covariant //# 02: compile-time error
int val) {}
// Same as above, but with `covariant` in different positions.
// The `covariant` is just wrong there.
int
covariant // //# 03: syntax error
x3;
int
covariant // //# 04: syntax error
get x4 => 499;
void set x5(
int
covariant //# 05: syntax error
val) {}
// Same without types.
// Since `covariant` is a built-in identifier, it is not allowed here.
covariant x6; // //# 06: syntax error
covariant covariant; // //# 06b: syntax error
// Getters may never have `covariant`.
covariant // //# 07: syntax error
get x7 => 499;
// Top level setters may not have a covariant.
// Would be considered a minor (acceptable) bug, if it was accepted here too.
void set x8(
covariant //# 08: compile-time error
val) {}
// If there is no type, then `covariant` is simply the parameter name:
void set x9(covariant) {}
// Covariant won't work on return types.
covariant // //# 10: syntax error
int f10() => 499;
// Covariant won't work as a return type.
covariant // //# 11: syntax error
f11() => 499;
// Covariant should not work on top-level methods.
// It's a minor (acceptable) bug to not error out here.
int f12(
covariant //# 12: compile-time error
int x) =>
499;
// `Covariant` must be in front of the types.
int f13(
int
covariant //# 13: syntax error
x) =>
499;
// Covariant should not work on top-level methods.
// It's a minor (acceptable) bug to not error out here.
int f14(
covariant //# 14: compile-time error
final x) =>
499;
// `Covariant` must be in front of modifiers.
int f15(
final
covariant //# 15: syntax error
x) =>
499;
// Covariant should not work on top-level methods.
// It's a minor (acceptable) bug to not error out here.
int f16(
covariant //# 16: compile-time error
final int x) =>
499;
// `Covariant` must be in front of modifiers.
int f17(
final
covariant //# 17: syntax error
int
x) =>
499;
// On its own, `covariant` is just a parameter name.
int f18(covariant) => covariant;
covariant; // //# 19: syntax error
// All of the above as statics in a class.
class A {
// Static fields may not have a covariant.
// Would be considered a minor (acceptable) bug, if it was accepted here too.
static
covariant // //# 20: syntax error
int x20;
static covariant int covariant; // //# 20b: syntax error
static int covariant; // //# 20c: ok
// Getters may never have `covariant`.
static
covariant // //# 21: syntax error
int get x21 => 499;
// Getters may never have `covariant`.
covariant // //# 21b: syntax error
static int get x21b => 499;
// Static setters may not have a covariant.
// Would be considered a minor (acceptable) bug, if it was accepted here too.
static void set x22(
covariant //# 22: compile-time error
int val) {}
// Same as above, but with `covariant` in different positions.
// The `covariant` is just wrong there.
static int
covariant // //# 23: syntax error
x23;
static int
covariant // //# 24: syntax error
get x24 => 499;
static void set x25(
int
covariant //# 25: syntax error
val) {}
// Since `covariant` is a built-in identifier, it is not allowed here.
static covariant x26; //# 26: syntax error
static covariant covariant; //# 26b: syntax error
// Getters may never have `covariant`.
static
covariant // //# 27: syntax error
get x27 => 499;
covariant // //# 27b: syntax error
static get x27b => 499;
// Static setters may not have a covariant.
// Would be considered a minor (acceptable) bug, if it was accepted here too.
static void set x28(
covariant //# 28: compile-time error
val) {}
// If there is no type, then `covariant` is simply the parameter name:
static void set x29(covariant) {}
// Covariant won't work on return types.
static
covariant // //# 30: syntax error
int f30() => 499;
covariant // //# 30b: syntax error
static int f30b() => 499;
// Covariant won't work as a return type.
static
covariant // //# 31: syntax error
f31() => 499;
covariant // //# 31b: syntax error
static f31b() => 499;
// Covariant should not work on static methods.
// It's a minor (acceptable) bug to not error out here.
static int f32(
covariant //# 32: compile-time error
int x) =>
499;
// `Covariant` must be in front of the types.
static int f33(
int
covariant //# 33: syntax error
x) =>
499;
// Covariant should not work on top-level methods.
// It's a minor (acceptable) bug to not error out here.
static int f34(
covariant //# 34: compile-time error
final x) =>
499;
// `Covariant` must be in front of modifiers.
static int f35(
final
covariant //# 35: syntax error
x) =>
499;
// Covariant should not work on top-level methods.
// It's a minor (acceptable) bug to not error out here.
static int f36(
covariant //# 36: compile-time error
final int x) =>
499;
// `Covariant` must be in front of modifiers.
static int f37(
final
covariant //# 37: syntax error
int
x) =>
499;
// `Covariant` on its own is just a parameter name.
static int f38(covariant) => covariant;
static covariant; // //# 39: syntax error
}
// All of the above as instance members in a class.
class B {
covariant // //# 40: ok
int x40;
covariant int covariant; // //# 40b: ok
int covariant; // //# 40c: ok
// Getters may never have `covariant`.
covariant // //# 41: syntax error
int get x41 => 499;
void set x42(
covariant // //# 42: ok
int val) {}
// `covariant` in the wrong position.
int
covariant // //# 43: syntax error
x43;
// `covariant` in the wrong position.
int
covariant // //# 44: syntax error
get x44 => 499;
void set x45(
int
covariant //# 45: syntax error
val) {}
// Since `covariant` is a built-in identifier, it is not allowed here.
covariant x46; //# 46: syntax error
covariant covariant; //# 46b: syntax error
// Getters may never have `covariant`.
covariant // //# 47: syntax error
get x47 => 499;
void set x48(
covariant // //# 48: ok
val) {}
// If there is no type, then `covariant` is simply the parameter name:
void set x49(covariant) {}
// Covariant won't work on return types.
covariant // //# 50: syntax error
int f50() => 499;
// Covariant won't work as a return type.
covariant // //# 51: syntax error
f51() => 499;
int f52(
covariant // //# 52: ok
int x) =>
499;
// `Covariant` must be in front of the types.
int f53(
int
covariant //# 53: syntax error
x) =>
499;
int f54(
covariant // //# 54: ok
final x) =>
499;
// `Covariant` must be in front of modifiers.
int f55(
final
covariant //# 55: syntax error
x) =>
499;
int f56(
covariant // //# 56: ok
final int x) =>
499;
// `Covariant` must be in front of modifiers.
int f57(
final
covariant //# 57: syntax error
int
x) =>
499;
// `Covariant` on its own is just a parameter name.
int f58(covariant) => covariant;
covariant; // //# 59: syntax error
}
void use(x) {}
main() {
x0 = 0;
covariant = 0; // //# 00b: continued
covariant = 0; // //# 00c: continued
use(x1);
x2 = 499;
use(x3);
use(x4);
x5 = 42;
x6 = 0; //# 06: continued
covariant = 0; //# 06b: continued
use(x7);
x8 = 11;
x9 = 12;
use(f10());
use(f11());
use(f12(2));
use(f13(3));
use(f14(3));
use(f15(3));
use(f16(3));
use(f17(3));
Expect.equals(123, f18(123));
use(covariant); // //# 19: continued
A.x20 = 0;
A.covariant = 0; // //# 20b: continued
A.covariant = 0; // //# 20c: continued
use(A.x21);
use(A.x21b);
A.x22 = 499;
use(A.x23);
use(A.x24);
A.x25 = 42;
A.x26 = 0; //# 26: continued
A.covariant = 0; //# 26b: continued
use(A.x27);
use(A.x27b);
A.x28 = 11;
A.x29 = 12;
use(A.f30());
use(A.f31());
use(A.f31b());
use(A.f32(2));
use(A.f33(3));
use(A.f34(3));
use(A.f35(3));
use(A.f36(3));
use(A.f37(3));
Expect.equals(1234, A.f38(1234));
use(A.covariant); // //# 39: continued
var b = new B();
b.x40 = 0;
b.covariant = 0; // //# 40b: continued
b.covariant = 0; // //# 40c: continued
use(b.x41);
b.x42 = 499;
use(b.x43);
use(b.x44);
b.x45 = 42;
b.x46 = 0; //# 46: continued
b.covariant = 0; //# 46b: continued
use(b.x47);
b.x48 = 11;
b.x49 = 12;
use(b.f50());
use(b.f51());
use(b.f52(2));
use(b.f53(2));
use(b.f54(3));
use(b.f55(3));
use(b.f56(3));
use(b.f57(3));
Expect.equals(12345, b.f58(12345));
use(B.covariant); // //# 59: continued
}