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// Copyright 2015 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// Flags: --strong-mode --harmony-arrow-functions
"use strict"
let prologue_dead = "(function outer() { if (false) { ";
let epilogue_dead = " } })();";
let prologue_live = "(function outer() { ";
let epilogue_live = "})();";
// For code which already throws a run-time error in non-strong mode; we assert
// that we now get the error already compilation time.
function assertLateErrorsBecomeEarly(code) {
assertThrows("'use strong'; " + prologue_dead + code + epilogue_dead,
ReferenceError);
// Make sure the error happens only in strong mode (note that we need strict
// mode here because of let).
assertDoesNotThrow("'use strict'; " + prologue_dead + code + epilogue_dead);
// But if we don't put the references inside a dead code, it throws a run-time
// error (also in strict mode).
assertThrows("'use strong'; " + prologue_live + code + epilogue_live,
ReferenceError);
assertThrows("'use strict'; " + prologue_live + code + epilogue_live,
ReferenceError);
}
// For code which doesn't throw an error at all in non-strong mode.
function assertNonErrorsBecomeEarly(code) {
assertThrows("'use strong'; " + prologue_dead + code + epilogue_dead,
ReferenceError);
assertDoesNotThrow("'use strict'; " + prologue_dead + code + epilogue_dead);
assertThrows("'use strong'; " + prologue_live + code + epilogue_live,
ReferenceError);
assertDoesNotThrow("'use strict'; " + prologue_live + code + epilogue_live,
ReferenceError);
}
(function InitTimeReferenceForward() {
// It's never OK to have an init time reference to a class which hasn't been
// declared.
assertLateErrorsBecomeEarly(
`class A extends B { }
class B {}`);
assertLateErrorsBecomeEarly(
`class A {
[B.sm()]() { }
}
class B {
static sm() { return 0; }
}`);
})();
(function InitTimeReferenceBackward() {
// Backwards is of course fine.
"use strong";
class A {
static sm() { return 0; }
}
let i = "making these classes non-consecutive";
class B extends A {};
"by inserting statements and declarations in between";
class C {
[A.sm()]() { }
};
})();
(function BasicMutualRecursion() {
"use strong";
class A {
m() { B; }
static sm() { B; }
}
// No statements or declarations between the classes.
class B {
m() { A; }
static sm() { A; }
}
})();
(function MutualRecursionWithMoreClasses() {
"use strong";
class A {
m() { B; C; }
static sm() { B; C; }
}
class B {
m() { A; C; }
static sm() { A; C; }
}
class C {
m() { A; B; }
static sm() { A; B; }
}
})();
(function ReferringForwardInDeeperScopes() {
"use strong";
function foo() {
class A1 {
m() { B1; }
}
class B1 { }
}
class Outer {
m() {
class A2 {
m() { B2; }
}
class B2 { }
}
}
for (let i = 0; i < 1; ++i) {
class A3 {
m() { B3; }
}
class B3 { }
}
(a, b) => {
class A4 {
m() { B4; }
}
class B4 { }
}
})();
(function ReferringForwardButClassesNotConsecutive() {
assertNonErrorsBecomeEarly(
`class A {
m() { B; }
}
;
class B {}`);
assertNonErrorsBecomeEarly(
`let A = class {
m() { B; }
}
class B {}`);
assertNonErrorsBecomeEarly(
`class A {
m() { B1; } // Just a normal use-before-declaration.
}
let B1 = class B2 {}`);
assertNonErrorsBecomeEarly(
`class A {
m() { B; }
}
let i = 0;
class B {}`);
assertNonErrorsBecomeEarly(
`class A {
m() { B; }
}
function foo() {}
class B {}`);
assertNonErrorsBecomeEarly(
`function foo() {
class A {
m() { B; }
}
}
class B {}`);
assertNonErrorsBecomeEarly(
`class A extends class B { m() { C; } } {
}
class C { }`);
assertLateErrorsBecomeEarly(
`class A extends class B { [C.sm()]() { } } {
}
class C { static sm() { return 'a';} }`);
assertLateErrorsBecomeEarly(
`class A extends class B extends C { } {
}
class C { }`);
})();
(function RegressionForClassResolution() {
assertNonErrorsBecomeEarly(
`let A = class B {
m() { C; }
}
;;;;
class C {}
class B {}`);
})();
(function TestMultipleMethodScopes() {
"use strong";
// Test cases where the reference is inside multiple method scopes.
class A1 {
m() {
class C1 {
m() { B1; }
}
}
}
class B1 { }
;
class A2 {
m() {
class C2 extends B2 {
}
}
}
class B2 { }
})();
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