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Merged
merged 12 commits into from
Aug 30, 2024
Merged

Added typeToTypeNode with truncation #59332

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f6e323c
Elide truncated typenodes
Aug 8, 2024
9092688
Fixed duplicate elided comment
Aug 9, 2024
44568f7
Change appendIfUnique for overwriting
Aug 13, 2024
c1b1d40
Handle truncation in createTypeNodesFromResolvedType
Aug 16, 2024
52c2ff1
dprint...
Aug 16, 2024
05431a6
Missing baseline
Aug 16, 2024
5810eab
Revert typos
Aug 16, 2024
5891f32
Added NotEmittedTypeElement
Aug 19, 2024
90dade9
Changed elided comment
Aug 21, 2024
3b44569
Revert "Changed elided comment"
Aug 21, 2024
2cbb9f3
Dont remove types
Aug 22, 2024
ac4ba37
Added elided test
Aug 28, 2024
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12 changes: 10 additions & 2 deletions .vscode/tasks.json
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Original file line number Diff line number Diff line change
Expand Up @@ -25,7 +25,12 @@
"label": "tsc: watch ./src",
"type": "shell",
"command": "node",
"args": ["${workspaceFolder}/node_modules/typescript/lib/tsc.js", "--build", "${workspaceFolder}/src", "--watch"],
"args": [
"${workspaceFolder}/node_modules/typescript/lib/tsc.js",
"--build",
"${workspaceFolder}/src",
"--watch"
],
"group": "build",
"isBackground": true,
"problemMatcher": [
Expand All @@ -36,7 +41,10 @@
"label": "npm: build:compiler",
"type": "npm",
"script": "build:compiler",
"group": "build",
"group": {
"kind": "build",
"isDefault": true
},
"problemMatcher": [
"$tsc"
]
Expand Down
22 changes: 19 additions & 3 deletions src/compiler/checker.ts
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Expand Up @@ -6,6 +6,7 @@ import {
addRange,
addRelatedInfo,
addSyntheticLeadingComment,
addSyntheticTrailingComment,
AliasDeclarationNode,
AllAccessorDeclarations,
AmbientModuleDeclaration,
Expand Down Expand Up @@ -7054,6 +7055,9 @@ export function createTypeChecker(host: TypeCheckerHost): TypeChecker {

function createTypeNodesFromResolvedType(resolvedType: ResolvedType): TypeElement[] | undefined {
if (checkTruncationLength(context)) {
if (context.flags & NodeBuilderFlags.NoTruncation) {
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Is there a test that shows what this looks like?

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@armanio123 armanio123 Aug 26, 2024 •
edited
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Now that you mentioned, there's no test for this scenario. I removed this check, and nothing regressed. I'm not sure how to test it but if it's utterly necessary I can address that another PR.

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https://app.codecov.io/gh/microsoft/TypeScript/pull/59332?dropdown=coverage&src=pr&el=h1&utm_medium=referral&utm_source=github&utm_content=checks&utm_campaign=pr+comments&utm_term=microsoft implies that this code is covered somewhere in a test. Maybe add an assert and reverse engineer a specific test from that?

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@armanio123 armanio123 Aug 28, 2024 •
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After deeper analysis, the file hugeDeclarationOutputGetsTruncatedWithError.types access this code.

Check line 18, for the last property zz. It changes from "zz": { ...; } to zz: { };. This is a "type" tests, during emit the "elided" comment gets added: zz: { /*elided*/ };

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Why don't we add elided in type tests?

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I was working on it. Added.

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Just to confirm, you're saying that in *.types files we will write "zz": { ...; } but in emit we will write zz: { /*elided*/ };? The thing I was interested in is whether or not we should do the latter for both, but maybe that's not what you were describing?

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No, I mean, before this change files in *.types files and during emit we write "zz": { ...; }.

After this change, *.types files and emit write "zz": { }, and .d.ts files "zz": { /*elided*/ } respectively.

See the test codeFixClassImplementInterfaceNoTruncationProperties.ts for the emit example. hugeDeclarationOutputGetsTruncatedWithError.types shows the *.types change.

return [];
}
return [factory.createPropertySignature(/*modifiers*/ undefined, "...", /*questionToken*/ undefined, /*type*/ undefined)];
}
const typeElements: TypeElement[] = [];
Expand Down Expand Up @@ -7085,7 +7089,13 @@ export function createTypeChecker(host: TypeCheckerHost): TypeChecker {
}
}
if (checkTruncationLength(context) && (i + 2 < properties.length - 1)) {
typeElements.push(factory.createPropertySignature(/*modifiers*/ undefined, `... ${properties.length - i} more ...`, /*questionToken*/ undefined, /*type*/ undefined));
if (context.flags & NodeBuilderFlags.NoTruncation) {
const typeElement = typeElements.pop()!;
typeElements.push(addSyntheticTrailingComment(typeElement, SyntaxKind.MultiLineCommentTrivia, `... ${properties.length - i} more ...`));
}
else {
typeElements.push(factory.createPropertySignature(/*modifiers*/ undefined, `... ${properties.length - i} more ...`, /*questionToken*/ undefined, /*type*/ undefined));
}
addPropertyToElementList(properties[properties.length - 1], context, typeElements);
break;
}
Expand All @@ -7100,7 +7110,7 @@ export function createTypeChecker(host: TypeCheckerHost): TypeChecker {
if (!(context.flags & NodeBuilderFlags.NoTruncation)) {
return factory.createTypeReferenceNode(factory.createIdentifier("..."), /*typeArguments*/ undefined);
}
return factory.createKeywordTypeNode(SyntaxKind.AnyKeyword);
return addSyntheticLeadingComment(factory.createKeywordTypeNode(SyntaxKind.AnyKeyword), SyntaxKind.MultiLineCommentTrivia, "elided");
}

function shouldUsePlaceholderForProperty(propertySymbol: Symbol, context: NodeBuilderContext) {
Expand Down Expand Up @@ -7259,7 +7269,10 @@ export function createTypeChecker(host: TypeCheckerHost): TypeChecker {
function mapToTypeNodes(types: readonly Type[] | undefined, context: NodeBuilderContext, isBareList?: boolean): TypeNode[] | undefined {
if (some(types)) {
if (checkTruncationLength(context)) {
if (!isBareList) {
if (context.flags & NodeBuilderFlags.NoTruncation) {
return [addSyntheticLeadingComment(factory.createKeywordTypeNode(SyntaxKind.AnyKeyword), SyntaxKind.MultiLineCommentTrivia, "elided")];
}
else if (!isBareList) {
return [factory.createTypeReferenceNode("...", /*typeArguments*/ undefined)];
}
else if (types.length > 2) {
Expand All @@ -7278,6 +7291,9 @@ export function createTypeChecker(host: TypeCheckerHost): TypeChecker {
for (const type of types) {
i++;
if (checkTruncationLength(context) && (i + 2 < types.length - 1)) {
if (context.flags & NodeBuilderFlags.NoTruncation) {
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Am I confused or is this truncating things more when the flag is enabled?

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It is not more per se, but it is replacing the previous values with an any

We kinda have 3 states: when NoTruncation is disabled, we truncate up to defaultMaximumTruncationLength, if NoTruncation is enabled it truncates up to noTruncationMaximumTruncationLength, anything after that is an any.

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A ... ${types.length - i} more elided ... comment would be more in-line with the non-grammatical node this replaces when NoTruncation is set.

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@armanio123 armanio123 Aug 21, 2024 •
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If we decide to remove all of the types and just have an any it will not make sense to have this message as the code will look like:

 foo(bar: /*... 516 more elided ...*/ any): /*elided*/ any {
        throw new Error("Method not implemented.");
    }
    get bar(): /*... 516 more elided ...*/ any {
        throw new Error("Method not implemented.");
    }
    set bar(value: /*... 516 more elided ...*/ any) {
        throw new Error("Method not implemented.");
    }
    baz<V extends /*... 516 more elided ...*/ any>(value: V): V {
        throw new Error("Method not implemented.");
    }

We can instead count all of the types that were elided and put that like the example below buy I honestly prefer just having /*elided*/ for something short and descriptive enough IMO.

 foo(bar: /*... 800 elided ...*/ any): /*... 800 elided ...*/ any {
       throw new Error("Method not implemented.");
 }

return [addSyntheticLeadingComment(factory.createKeywordTypeNode(SyntaxKind.AnyKeyword), SyntaxKind.MultiLineCommentTrivia, "elided")];
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Hm, this is discarding all the parts we already actually got to before hitting the truncation limit - shouldn't this all be something more like

result.push(context.flags & NodeBuilderFlags.NoTruncation ? addSyntheticLeadingComment(factory.createKeywordTypeNode(SyntaxKind.AnyKeyword), SyntaxKind.MultiLineCommentTrivia, `... ${types.length - i} more elided ...`)  : factory.createTypeReferenceNode(`... ${types.length - i} more ...`, /*typeArguments*/ undefined));

merged into the line below? This way we still get something like

A | B | C | /* ... 6 more elided ... */ any | undefined

out? (Part of the reason elision is a bit special here is because it endeavors to retain the last element, since elision only really makes sense in the middle.)
As written, this is just going to output

/* elided */ any

for the whole union, even if there's enough allotted space for a lot of the union.

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@armanio123 armanio123 Aug 21, 2024 •
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Including part of types then truncating with an any seems to me like it would be incorrect and unnecessary, even for the last type. Instead, I would argue that if we are truncating and putting any anyway, we might as well remove the whole thing and replace it for an any.

Arguably, adding the types might serve as documentation, but it will be incorrect as we're not including all of the types, just some of them.

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@weswigham weswigham Aug 22, 2024 •
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Unnecessary for the type arithmetic? Yes. A | B | any is just any. Unnecessary for the human that has to go and fill in the blank after the quickfix runs? Probably not! The more context we retain, the easier it is for the human that has to go and fix this fix's output with what's supposed to go there!

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I changed as requested but I have some concerns.

I understand your point about retaining context, however, I respectfully disagree because the amount of code generated might become too large to be useful. I fear even the comment might go unnoticed. If this happens, including partial types and then truncating with any can lead to confusion and inaccuracies.

I feel is more efficient to replace the entire section with any to maintain clarity and correctness. This way, we avoid the risk of misinterpretation and ensure the code remains manageable.

i.e take a look at the test codeFixClassImplementInterfaceNoTruncation.ts in the latest change, finding where the parameter type ends is already complicated. A user noticing the comment, or the introduction of any seems likely to be missed.

}
result.push(factory.createTypeReferenceNode(`... ${types.length - i} more ...`, /*typeArguments*/ undefined));
const typeNode = typeToTypeNodeHelper(types[types.length - 1], context);
if (typeNode) {
Expand Down
9 changes: 4 additions & 5 deletions src/compiler/factory/nodeFactory.ts
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@@ -1,7 +1,6 @@
import {
__String,
AccessorDeclaration,
addRange,
append,
appendIfUnique,
ArrayBindingElement,
Expand Down Expand Up @@ -7446,16 +7445,16 @@ function mergeEmitNode(sourceEmitNode: EmitNode, destEmitNode: EmitNode | undefi

// `annotatedNodes` are not merged as they should only present on the parse tree node of a `SourceFile`.

// `leadingComments` are concatenated with any existing leading comments on the destination
// `leadingComments` overwrites the destination
if (leadingComments) {
// We use `.slice()` in case `destEmitNode.leadingComments` is pushed to later
destEmitNode.leadingComments = addRange(leadingComments.slice(), destEmitNode.leadingComments);
destEmitNode.leadingComments = leadingComments.slice();
}

// `trailingComments` are concatenated with any existing trailing comments on the destination
// `trailingComments` overwrites the destination
if (trailingComments) {
// We use `.slice()` in case `destEmitNode.trailingComments` is pushed to later
destEmitNode.trailingComments = addRange(trailingComments.slice(), destEmitNode.trailingComments);
destEmitNode.trailingComments = trailingComments.slice();
}

// `commentRange` overwrites the destination
Expand Down
6 changes: 3 additions & 3 deletions src/services/codefixes/helpers.ts
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Expand Up @@ -217,12 +217,12 @@ export function addNewNodeForMemberSymbol(
const optional = !!(symbol.flags & SymbolFlags.Optional);
const ambient = !!(enclosingDeclaration.flags & NodeFlags.Ambient) || isAmbient;
const quotePreference = getQuotePreference(sourceFile, preferences);
const flags = NodeBuilderFlags.NoTruncation
| (quotePreference === QuotePreference.Single ? NodeBuilderFlags.UseSingleQuotesForStringLiteralType : NodeBuilderFlags.None);

switch (kind) {
case SyntaxKind.PropertySignature:
case SyntaxKind.PropertyDeclaration:
let flags = NodeBuilderFlags.NoTruncation;
flags |= quotePreference === QuotePreference.Single ? NodeBuilderFlags.UseSingleQuotesForStringLiteralType : 0;
let typeNode = checker.typeToTypeNode(type, enclosingDeclaration, flags, InternalNodeBuilderFlags.AllowUnresolvedNames, getNoopSymbolTrackerWithResolver(context));
if (importAdder) {
const importableReference = tryGetAutoImportableReferenceFromTypeNode(typeNode, scriptTarget);
Expand All @@ -242,7 +242,7 @@ export function addNewNodeForMemberSymbol(
case SyntaxKind.GetAccessor:
case SyntaxKind.SetAccessor: {
Debug.assertIsDefined(declarations);
let typeNode = checker.typeToTypeNode(type, enclosingDeclaration, /*flags*/ undefined, /*internalFlags*/ undefined, getNoopSymbolTrackerWithResolver(context));
let typeNode = checker.typeToTypeNode(type, enclosingDeclaration, flags, /*internalFlags*/ undefined, getNoopSymbolTrackerWithResolver(context));
const allAccessors = getAllAccessorDeclarations(declarations, declaration as AccessorDeclaration);
const orderedAccessors = allAccessors.secondAccessor
? [allAccessors.firstAccessor, allAccessors.secondAccessor]
Expand Down
2 changes: 1 addition & 1 deletion tests/baselines/reference/classExpressionInClassStaticDeclarations.js
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Expand Up @@ -39,6 +39,6 @@ var C = /** @class */ (function () {
declare class C {
static D: {
new (): {};
D: any;
D: /*elided*/ any;
};
}
2 changes: 1 addition & 1 deletion tests/baselines/reference/commonJSImportNestedClassTypeReference.js
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Expand Up @@ -41,7 +41,7 @@ function f(k) {
//// [mod1.d.ts]
export var K: {
new (): {
values(): any;
values(): /*elided*/ any;
};
};
//// [main.d.ts]
Expand Down
4 changes: 2 additions & 2 deletions tests/baselines/reference/declFileTypeofFunction.js
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Expand Up @@ -70,6 +70,6 @@ declare function b1(): typeof b1;
declare function foo(): typeof foo;
declare var foo1: typeof foo;
declare var foo2: typeof foo;
declare var foo3: () => any;
declare var x: () => any;
declare var foo3: () => /*elided*/ any;
declare var x: () => /*elided*/ any;
declare function foo5(x: number): (x: number) => number;
2 changes: 1 addition & 1 deletion tests/baselines/reference/declarationEmitInferredTypeAlias4.js
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Expand Up @@ -16,5 +16,5 @@ function f() {

//// [declarationEmitInferredTypeAlias4.d.ts]
declare function f<A>(): A[] | {
x: A[] | any;
x: A[] | /*elided*/ any;
};
4 changes: 2 additions & 2 deletions tests/baselines/reference/declarationsWithRecursiveInternalTypesProduceUniqueTypeParams.js
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Expand Up @@ -96,7 +96,7 @@ void p3.result.three;
//// [declarationsWithRecursiveInternalTypesProduceUniqueTypeParams.d.ts]
export type Key<U> = keyof U;
export type Value<K extends Key<U>, U> = U[K];
export declare const updateIfChanged: <T>(t: T) => (<K extends keyof T>(key: K) => (<K_1 extends keyof Value<K, T>>(key: K_1) => (<K_2 extends keyof Value<K_1, Value<K, T>>>(key: K_2) => (<K_3 extends keyof Value<K_2, Value<K_1, Value<K, T>>>>(key: K_3) => (<K_4 extends keyof Value<K_3, Value<K_2, Value<K_1, Value<K, T>>>>>(key: K_4) => (<K_5 extends keyof Value<K_4, Value<K_3, Value<K_2, Value<K_1, Value<K, T>>>>>>(key: K_5) => (<K_6 extends keyof Value<K_5, Value<K_4, Value<K_3, Value<K_2, Value<K_1, Value<K, T>>>>>>>(key: K_6) => (<K_7 extends keyof Value<K_6, Value<K_5, Value<K_4, Value<K_3, Value<K_2, Value<K_1, Value<K, T>>>>>>>>(key: K_7) => (<K_8 extends keyof Value<K_7, Value<K_6, Value<K_5, Value<K_4, Value<K_3, Value<K_2, Value<K_1, Value<K, T>>>>>>>>>(key: K_8) => (<K_9 extends keyof Value<K_8, Value<K_7, Value<K_6, Value<K_5, Value<K_4, Value<K_3, Value<K_2, Value<K_1, Value<K, T>>>>>>>>>>(key: K_9) => (<K_10 extends keyof Value<K_9, Value<K_8, Value<K_7, Value<K_6, Value<K_5, Value<K_4, Value<K_3, Value<K_2, Value<K_1, Value<K, T>>>>>>>>>>>(key: K_10) => any & {
export declare const updateIfChanged: <T>(t: T) => (<K extends keyof T>(key: K) => (<K_1 extends keyof Value<K, T>>(key: K_1) => (<K_2 extends keyof Value<K_1, Value<K, T>>>(key: K_2) => (<K_3 extends keyof Value<K_2, Value<K_1, Value<K, T>>>>(key: K_3) => (<K_4 extends keyof Value<K_3, Value<K_2, Value<K_1, Value<K, T>>>>>(key: K_4) => (<K_5 extends keyof Value<K_4, Value<K_3, Value<K_2, Value<K_1, Value<K, T>>>>>>(key: K_5) => (<K_6 extends keyof Value<K_5, Value<K_4, Value<K_3, Value<K_2, Value<K_1, Value<K, T>>>>>>>(key: K_6) => (<K_7 extends keyof Value<K_6, Value<K_5, Value<K_4, Value<K_3, Value<K_2, Value<K_1, Value<K, T>>>>>>>>(key: K_7) => (<K_8 extends keyof Value<K_7, Value<K_6, Value<K_5, Value<K_4, Value<K_3, Value<K_2, Value<K_1, Value<K, T>>>>>>>>>(key: K_8) => (<K_9 extends keyof Value<K_8, Value<K_7, Value<K_6, Value<K_5, Value<K_4, Value<K_3, Value<K_2, Value<K_1, Value<K, T>>>>>>>>>>(key: K_9) => (<K_10 extends keyof Value<K_9, Value<K_8, Value<K_7, Value<K_6, Value<K_5, Value<K_4, Value<K_3, Value<K_2, Value<K_1, Value<K, T>>>>>>>>>>>(key: K_10) => /*elided*/ any & {
map: (updater: (u: Value<K_10, Value<K_9, Value<K_8, Value<K_7, Value<K_6, Value<K_5, Value<K_4, Value<K_3, Value<K_2, Value<K_1, Value<K, T>>>>>>>>>>>) => Value<K_10, Value<K_9, Value<K_8, Value<K_7, Value<K_6, Value<K_5, Value<K_4, Value<K_3, Value<K_2, Value<K_1, Value<K, T>>>>>>>>>>>) => T;
set: (newU: Value<K_10, Value<K_9, Value<K_8, Value<K_7, Value<K_6, Value<K_5, Value<K_4, Value<K_3, Value<K_2, Value<K_1, Value<K, T>>>>>>>>>>>) => T;
}) & {
Expand Down Expand Up @@ -155,7 +155,7 @@ export declare const testRecFun: <T extends Object>(parent: T) => {
result: T & U & U_1 & U_2 & U_3 & U_4 & U_5 & U_6 & U_7 & U_8;
deeper: <U_9 extends Object>(child: U_9) => {
result: T & U & U_1 & U_2 & U_3 & U_4 & U_5 & U_6 & U_7 & U_8 & U_9;
deeper: <U_10 extends Object>(child: U_10) => any;
deeper: <U_10 extends Object>(child: U_10) => /*elided*/ any;
};
};
};
Expand Down
6 changes: 3 additions & 3 deletions tests/baselines/reference/emitClassExpressionInDeclarationFile.js
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Expand Up @@ -107,12 +107,12 @@ export declare var simpleExample: {
};
export declare var circularReference: {
new (): {
tags(c: any): any;
tags(c: /*elided*/ any): /*elided*/ any;
};
getTags(c: {
tags(c: any): any;
tags(c: /*elided*/ any): /*elided*/ any;
}): {
tags(c: any): any;
tags(c: /*elided*/ any): /*elided*/ any;
};
};
export declare class FooItem {
Expand Down
2 changes: 1 addition & 1 deletion tests/baselines/reference/functionExpressionReturningItself.js
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Expand Up @@ -8,4 +8,4 @@ var x = function somefn() { return somefn; };


//// [functionExpressionReturningItself.d.ts]
declare var x: () => any;
declare var x: () => /*elided*/ any;
16 changes: 8 additions & 8 deletions tests/baselines/reference/hugeDeclarationOutputGetsTruncatedWithError.types
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24 changes: 12 additions & 12 deletions tests/baselines/reference/noImplicitThisBigThis.js
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Expand Up @@ -100,18 +100,18 @@ function createObjNoCrash() {

//// [noImplicitThisBigThis.d.ts]
declare function createObj(): {
func1(): any;
func2(): any;
func3(): any;
func1(): /*elided*/ any;
func2(): /*elided*/ any;
func3(): /*elided*/ any;
};
declare function createObjNoCrash(): {
func1(): any;
func2(): any;
func3(): any;
func4(): any;
func5(): any;
func6(): any;
func7(): any;
func8(): any;
func9(): any;
func1(): /*elided*/ any;
func2(): /*elided*/ any;
func3(): /*elided*/ any;
func4(): /*elided*/ any;
func5(): /*elided*/ any;
func6(): /*elided*/ any;
func7(): /*elided*/ any;
func8(): /*elided*/ any;
func9(): /*elided*/ any;
};
2 changes: 1 addition & 1 deletion tests/baselines/reference/varianceAnnotations.js
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Expand Up @@ -333,6 +333,6 @@ declare let Anon: {
};
declare let OuterC: {
new <out T>(): {
foo(): any;
foo(): /*elided*/ any;
};
};
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