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Exclude JSDoc @extends from 'super()' checks #29308

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Jan 9, 2019
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6 changes: 3 additions & 3 deletions src/compiler/checker.ts
Original file line number Diff line number Diff line change
Expand Up @@ -16625,7 +16625,7 @@ namespace ts {

function checkThisBeforeSuper(node: Node, container: Node, diagnosticMessage: DiagnosticMessage) {
const containingClassDecl = <ClassDeclaration>container.parent;
const baseTypeNode = getEffectiveBaseTypeNode(containingClassDecl);
const baseTypeNode = getClassExtendsHeritageElement(containingClassDecl);

// If a containing class does not have extends clause or the class extends null
// skip checking whether super statement is called before "this" accessing.
Expand Down Expand Up @@ -16974,7 +16974,7 @@ namespace ts {

// at this point the only legal case for parent is ClassLikeDeclaration
const classLikeDeclaration = <ClassLikeDeclaration>container.parent;
if (!getEffectiveBaseTypeNode(classLikeDeclaration)) {
if (!getClassExtendsHeritageElement(classLikeDeclaration)) {
error(node, Diagnostics.super_can_only_be_referenced_in_a_derived_class);
return errorType;
}
Expand Down Expand Up @@ -23575,7 +23575,7 @@ namespace ts {
// Constructors of classes with no extends clause may not contain super calls, whereas
// constructors of derived classes must contain at least one super call somewhere in their function body.
const containingClassDecl = <ClassDeclaration>node.parent;
if (getEffectiveBaseTypeNode(containingClassDecl)) {
if (getClassExtendsHeritageElement(containingClassDecl)) {
captureLexicalThis(node.parent, containingClassDecl);
const classExtendsNull = classDeclarationExtendsNull(containingClassDecl);
const superCall = getSuperCallInConstructor(node);
Expand Down
Original file line number Diff line number Diff line change
@@ -0,0 +1,22 @@
tests/cases/compiler/noSuperInJSDocExtends.js(14,9): error TS2335: 'super' can only be referenced in a derived class.


==== tests/cases/compiler/noSuperInJSDocExtends.js (1 errors) ====
class Based { }
/** @extends {Based} */
class Derived {
constructor() {
this;
this.x = 10;
var that = this;
}
}

/** @extends {Based} */
class Derived2 {
constructor() {
super();
~~~~~
!!! error TS2335: 'super' can only be referenced in a derived class.
}
}
Original file line number Diff line number Diff line change
@@ -0,0 +1,31 @@
=== tests/cases/compiler/noSuperInJSDocExtends.js ===
class Based { }
>Based : Symbol(Based, Decl(noSuperInJSDocExtends.js, 0, 0))

/** @extends {Based} */
class Derived {
>Derived : Symbol(Derived, Decl(noSuperInJSDocExtends.js, 0, 15))

constructor() {
this;
>this : Symbol(Derived, Decl(noSuperInJSDocExtends.js, 0, 15))

this.x = 10;
>this.x : Symbol(Derived.x, Decl(noSuperInJSDocExtends.js, 4, 13))
>this : Symbol(Derived, Decl(noSuperInJSDocExtends.js, 0, 15))
>x : Symbol(Derived.x, Decl(noSuperInJSDocExtends.js, 4, 13))

var that = this;
>that : Symbol(that, Decl(noSuperInJSDocExtends.js, 6, 11))
>this : Symbol(Derived, Decl(noSuperInJSDocExtends.js, 0, 15))
}
}

/** @extends {Based} */
class Derived2 {
>Derived2 : Symbol(Derived2, Decl(noSuperInJSDocExtends.js, 8, 1))

constructor() {
super();
}
}
35 changes: 35 additions & 0 deletions tests/baselines/reference/checkSuperCallBeforeThisAccessing9.types
Original file line number Diff line number Diff line change
@@ -0,0 +1,35 @@
=== tests/cases/compiler/noSuperInJSDocExtends.js ===
class Based { }
>Based : Based

/** @extends {Based} */
class Derived {
>Derived : Derived

constructor() {
this;
>this : this

this.x = 10;
>this.x = 10 : 10
>this.x : number
>this : this
>x : number
>10 : 10

var that = this;
>that : this
>this : this
}
}

/** @extends {Based} */
class Derived2 {
>Derived2 : Derived2

constructor() {
super();
>super() : void
>super : any
}
}
21 changes: 21 additions & 0 deletions tests/cases/compiler/checkSuperCallBeforeThisAccessing9.ts
Original file line number Diff line number Diff line change
@@ -0,0 +1,21 @@
// @allowJs: true
// @checkJs: true
// @noEmit: true

// @filename: noSuperInJSDocExtends.js
class Based { }
/** @extends {Based} */
class Derived {
constructor() {
this;
this.x = 10;
var that = this;
}
}

/** @extends {Based} */
class Derived2 {
constructor() {
super();
}
}