fix(51202): Circular instantiation expression crashing IDEs

src/compiler/checker.ts

@@ -6671,6 +6671,20 @@ export function createTypeChecker(host: TypeCheckerHost): TypeChecker {
                     }
                 }
                 else {
+                    const isInstantiationExpressionType = !!(getObjectFlags(type) & ObjectFlags.InstantiationExpressionType);
+                    if (isInstantiationExpressionType) {
+                        const instantiationExpressionType = type as InstantiationExpressionType;
+                        if (isTypeQueryNode(instantiationExpressionType.node)) {
+                            const typeNode = serializeExistingTypeNode(context, instantiationExpressionType.node);
+                            if (typeNode) {
+                                return typeNode;
+                            }
+                        }
+                        if (context.visitedTypes?.has(typeId)) {
+                            return createElidedInformationPlaceholder(context);
+                        }
+                        return visitAndTransformType(type, createTypeNodeFromObjectType);
+                    }
                     // Anonymous types without a symbol are never circular.
                     return createTypeNodeFromObjectType(type);
                 }

tests/baselines/reference/arrayTypeOfTypeOf.types

@@ -14,11 +14,11 @@ var xs2: typeof Array;
 >Array : ArrayConstructor
 
 var xs3: typeof Array<number>;
->xs3 : { (arrayLength: number): number[]; (...items: number[]): number[]; new (arrayLength: number): number[]; new (...items: number[]): number[]; isArray(arg: any): arg is any[]; readonly prototype: any[]; }
+>xs3 : typeof Array<number>
 >Array : ArrayConstructor
 
 var xs4: typeof Array<typeof x>;
->xs4 : { (arrayLength: number): number[]; (...items: number[]): number[]; new (arrayLength: number): number[]; new (...items: number[]): number[]; isArray(arg: any): arg is any[]; readonly prototype: any[]; }
+>xs4 : typeof Array<typeof x>
 >Array : ArrayConstructor
 >x : number
 

tests/baselines/reference/circularInstantiationExpression.js

@@ -0,0 +1,11 @@
+//// [circularInstantiationExpression.ts]
+declare function foo<T>(t: T): typeof foo<T>;
+foo("");
+
+
+//// [circularInstantiationExpression.js]
+foo("");
+
+
+//// [circularInstantiationExpression.d.ts]
+declare function foo<T>(t: T): typeof foo<T>;

tests/baselines/reference/circularInstantiationExpression.symbols

@@ -0,0 +1,12 @@
+=== tests/cases/compiler/circularInstantiationExpression.ts ===
+declare function foo<T>(t: T): typeof foo<T>;
+>foo : Symbol(foo, Decl(circularInstantiationExpression.ts, 0, 0))
+>T : Symbol(T, Decl(circularInstantiationExpression.ts, 0, 21))
+>t : Symbol(t, Decl(circularInstantiationExpression.ts, 0, 24))
+>T : Symbol(T, Decl(circularInstantiationExpression.ts, 0, 21))
+>foo : Symbol(foo, Decl(circularInstantiationExpression.ts, 0, 0))
+>T : Symbol(T, Decl(circularInstantiationExpression.ts, 0, 21))
+
+foo("");
+>foo : Symbol(foo, Decl(circularInstantiationExpression.ts, 0, 0))
+

tests/baselines/reference/circularInstantiationExpression.types

@@ -0,0 +1,11 @@
+=== tests/cases/compiler/circularInstantiationExpression.ts ===
+declare function foo<T>(t: T): typeof foo<T>;
+>foo : <T>(t: T) => typeof foo<T>
+>t : T
+>foo : <T>(t: T) => typeof foo<T>
+
+foo("");
+>foo("") : (t: string) => any
+>foo : <T>(t: T) => (t: T) => any
+>"" : ""
+

tests/baselines/reference/expressionWithJSDocTypeArguments.types

@@ -33,19 +33,19 @@ const ComeOnFoo = foo<?string?>;
 >foo : <T>(x: T) => T
 
 type TWhatFoo = typeof foo<?>;
->TWhatFoo : (x: any) => any
+>TWhatFoo : typeof foo<unknown>
 >foo : <T>(x: T) => T
 
 type THuhFoo = typeof foo<string?>;
->THuhFoo : (x: string | null) => string | null
+>THuhFoo : typeof foo<string | null>
 >foo : <T>(x: T) => T
 
 type TNopeFoo = typeof foo<?string>;
->TNopeFoo : (x: string | null) => string | null
+>TNopeFoo : typeof foo<string | null>
 >foo : <T>(x: T) => T
 
 type TComeOnFoo = typeof foo<?string?>;
->TComeOnFoo : (x: string | null) => string | null
+>TComeOnFoo : typeof foo<(string | null) | null>
 >foo : <T>(x: T) => T
 
 const WhatBar = Bar<?>;
@@ -69,18 +69,18 @@ const ComeOnBar = Bar<?string?>;
 >Bar : typeof Bar
 
 type TWhatBar = typeof Bar<?>;
->TWhatBar : { new (x: any): Bar<any>; prototype: Bar<any>; }
+>TWhatBar : typeof Bar<unknown>
 >Bar : typeof Bar
 
 type THuhBar = typeof Bar<string?>;
->THuhBar : { new (x: string | null): Bar<string | null>; prototype: Bar<any>; }
+>THuhBar : typeof Bar<string | null>
 >Bar : typeof Bar
 
 type TNopeBar = typeof Bar<?string>;
->TNopeBar : { new (x: string | null): Bar<string | null>; prototype: Bar<any>; }
+>TNopeBar : typeof Bar<string | null>
 >Bar : typeof Bar
 
 type TComeOnBar = typeof Bar<?string?>;
->TComeOnBar : { new (x: string | null): Bar<string | null>; prototype: Bar<any>; }
+>TComeOnBar : typeof Bar<(string | null) | null>
 >Bar : typeof Bar
 

tests/baselines/reference/instantiationExpressions.types

@@ -41,15 +41,15 @@ type T10 = typeof fx<>;  // Error
 >fx : { <T>(x: T): T; <T>(x: T, n: number): T; <T, U>(t: [T, U]): [T, U]; }
 
 type T11 = typeof fx<string>;  // { (x: string): string; (x: string, n: number): string; }
->T11 : { (x: string): string; (x: string, n: number): string; }
+>T11 : typeof fx<string>
 >fx : { <T>(x: T): T; <T>(x: T, n: number): T; <T, U>(t: [T, U]): [T, U]; }
 
 type T12 = typeof fx<string, number>;  // (t: [string, number]) => [string, number]
->T12 : (t: [string, number]) => [string, number]
+>T12 : typeof fx<string, number>
 >fx : { <T>(x: T): T; <T>(x: T, n: number): T; <T, U>(t: [T, U]): [T, U]; }
 
 type T13 = typeof fx<string, number, boolean>;  // Error
->T13 : {}
+>T13 : typeof fx<string, number, boolean>
 >fx : { <T>(x: T): T; <T>(x: T, n: number): T; <T, U>(t: [T, U]): [T, U]; }
 
 function f2() {
@@ -76,11 +76,11 @@ type T20 = typeof Array<>;  // Error
 >Array : ArrayConstructor
 
 type T21 = typeof Array<string>;  // new (...) => string[]
->T21 : { (arrayLength: number): string[]; (...items: string[]): string[]; new (arrayLength: number): string[]; new (...items: string[]): string[]; isArray(arg: any): arg is any[]; readonly prototype: any[]; }
+>T21 : typeof Array<string>
 >Array : ArrayConstructor
 
 type T22 = typeof Array<string, number>;  // Error
->T22 : { isArray(arg: any): arg is any[]; readonly prototype: any[]; }
+>T22 : typeof Array<string, number>
 >Array : ArrayConstructor
 
 declare class C<T> {
@@ -439,7 +439,7 @@ function makeBox<T>(value: T) {
 }
 
 type BoxFunc<T> = typeof makeBox<T>;  // (value: T) => { value: T }
->BoxFunc : (value: T) => { value: T; }
+>BoxFunc : typeof makeBox<T>
 >makeBox : <T>(value: T) => { value: T; }
 
 type StringBoxFunc = BoxFunc<string>;  // (value: string) => { value: string }
@@ -469,7 +469,7 @@ declare const g1: {
 }
 
 type T30<V> = typeof g1<V>;  // { (a: V) => { a: V }; new (b: V) => { b: V }; }
->T30 : { (a: V): { a: V; }; new (b: V): { b: V; }; }
+>T30 : typeof g1<V>
 >g1 : { <T>(a: T): { a: T; }; new <U>(b: U): { b: U; }; }
 
 type T31<A> = ReturnType<T30<A>>;  // { a: A }
@@ -489,11 +489,11 @@ declare const g2: {
 }
 
 type T40<U extends string> = typeof g2<U>;  // Error
->T40 : { (a: U): U; new <T extends number>(b: T): T; }
+>T40 : typeof g2<U>
 >g2 : { <T extends string>(a: T): T; new <T extends number>(b: T): T; }
 
 type T41<U extends number> = typeof g2<U>;  // Error
->T41 : { <T extends string>(a: T): T; new (b: U): U; }
+>T41 : typeof g2<U>
 >g2 : { <T extends string>(a: T): T; new <T extends number>(b: T): T; }
 
 declare const g3: {
@@ -507,10 +507,10 @@ declare const g3: {
 }
 
 type T50<U extends string> = typeof g3<U>;  // (a: U) => U
->T50 : (a: U) => U
+>T50 : typeof g3<U>
 >g3 : { <T extends string>(a: T): T; new <T extends number, Q>(b: T): T; }
 
 type T51<U extends number> = typeof g3<U, any>;  // (b: U) => U
->T51 : new (b: U) => U
+>T51 : typeof g3<U, any>
 >g3 : { <T extends string>(a: T): T; new <T extends number, Q>(b: T): T; }
 

tests/baselines/reference/quickInfoCircularInstantiationExpression.baseline

@@ -0,0 +1,124 @@
+=== /tests/cases/fourslash/quickInfoCircularInstantiationExpression.ts ===
+// declare function foo<T>(t: T): typeof foo<T>;
+// foo("");
+// ^^^
+// | ----------------------------------------------------------------------
+// | function foo<string>(t: string): (t: string) => ...
+// | ----------------------------------------------------------------------
+
+[
+  {
+    "marker": {
+      "fileName": "/tests/cases/fourslash/quickInfoCircularInstantiationExpression.ts",
+      "position": 46,
+      "name": ""
+    },
+    "item": {
+      "kind": "function",
+      "kindModifiers": "declare",
+      "textSpan": {
+        "start": 46,
+        "length": 3
+      },
+      "displayParts": [
+        {
+          "text": "function",
+          "kind": "keyword"
+        },
+        {
+          "text": " ",
+          "kind": "space"
+        },
+        {
+          "text": "foo",
+          "kind": "functionName"
+        },
+        {
+          "text": "<",
+          "kind": "punctuation"
+        },
+        {
+          "text": "string",
+          "kind": "keyword"
+        },
+        {
+          "text": ">",
+          "kind": "punctuation"
+        },
+        {
+          "text": "(",
+          "kind": "punctuation"
+        },
+        {
+          "text": "t",
+          "kind": "parameterName"
+        },
+        {
+          "text": ":",
+          "kind": "punctuation"
+        },
+        {
+          "text": " ",
+          "kind": "space"
+        },
+        {
+          "text": "string",
+          "kind": "keyword"
+        },
+        {
+          "text": ")",
+          "kind": "punctuation"
+        },
+        {
+          "text": ":",
+          "kind": "punctuation"
+        },
+        {
+          "text": " ",
+          "kind": "space"
+        },
+        {
+          "text": "(",
+          "kind": "punctuation"
+        },
+        {
+          "text": "t",
+          "kind": "parameterName"
+        },
+        {
+          "text": ":",
+          "kind": "punctuation"
+        },
+        {
+          "text": " ",
+          "kind": "space"
+        },
+        {
+          "text": "string",
+          "kind": "keyword"
+        },
+        {
+          "text": ")",
+          "kind": "punctuation"
+        },
+        {
+          "text": " ",
+          "kind": "space"
+        },
+        {
+          "text": "=>",
+          "kind": "punctuation"
+        },
+        {
+          "text": " ",
+          "kind": "space"
+        },
+        {
+          "text": "...",
+          "kind": "text"
+        }
+      ],
+      "documentation": []
+    }
+  }
+]

tests/baselines/reference/selfReferentialFunctionType.js

@@ -0,0 +1,14 @@
+//// [selfReferentialFunctionType.ts]
+declare function f<T>(args: typeof f<T>): T;
+declare function g<T = typeof g>(args: T): T;
+declare function h<T>(): typeof h<T>;
+
+
+//// [selfReferentialFunctionType.js]
+"use strict";
+
+
+//// [selfReferentialFunctionType.d.ts]
+declare function f<T>(args: typeof f<T>): T;
+declare function g<T = typeof g>(args: T): T;
+declare function h<T>(): typeof h<T>;

tests/baselines/reference/selfReferentialFunctionType.symbols

@@ -0,0 +1,23 @@
+=== tests/cases/compiler/selfReferentialFunctionType.ts ===
+declare function f<T>(args: typeof f<T>): T;
+>f : Symbol(f, Decl(selfReferentialFunctionType.ts, 0, 0))
+>T : Symbol(T, Decl(selfReferentialFunctionType.ts, 0, 19))
+>args : Symbol(args, Decl(selfReferentialFunctionType.ts, 0, 22))
+>f : Symbol(f, Decl(selfReferentialFunctionType.ts, 0, 0))
+>T : Symbol(T, Decl(selfReferentialFunctionType.ts, 0, 19))
+>T : Symbol(T, Decl(selfReferentialFunctionType.ts, 0, 19))
+
+declare function g<T = typeof g>(args: T): T;
+>g : Symbol(g, Decl(selfReferentialFunctionType.ts, 0, 44))
+>T : Symbol(T, Decl(selfReferentialFunctionType.ts, 1, 19))
+>g : Symbol(g, Decl(selfReferentialFunctionType.ts, 0, 44))
+>args : Symbol(args, Decl(selfReferentialFunctionType.ts, 1, 33))
+>T : Symbol(T, Decl(selfReferentialFunctionType.ts, 1, 19))
+>T : Symbol(T, Decl(selfReferentialFunctionType.ts, 1, 19))
+
+declare function h<T>(): typeof h<T>;
+>h : Symbol(h, Decl(selfReferentialFunctionType.ts, 1, 45))
+>T : Symbol(T, Decl(selfReferentialFunctionType.ts, 2, 19))
+>h : Symbol(h, Decl(selfReferentialFunctionType.ts, 1, 45))
+>T : Symbol(T, Decl(selfReferentialFunctionType.ts, 2, 19))
+

tests/baselines/reference/selfReferentialFunctionType.types

@@ -0,0 +1,15 @@
+=== tests/cases/compiler/selfReferentialFunctionType.ts ===
+declare function f<T>(args: typeof f<T>): T;
+>f : <T>(args: typeof f<T>) => T
+>args : typeof f<T>
+>f : <T>(args: typeof f<T>) => T
+
+declare function g<T = typeof g>(args: T): T;
+>g : <T = typeof g>(args: T) => T
+>g : <T = typeof g>(args: T) => T
+>args : T
+
+declare function h<T>(): typeof h<T>;
+>h : <T>() => typeof h<T>
+>h : <T>() => typeof h<T>
+

tests/cases/compiler/circularInstantiationExpression.ts

@@ -0,0 +1,3 @@
+// @declaration: true
+declare function foo<T>(t: T): typeof foo<T>;
+foo("");

tests/cases/compiler/selfReferentialFunctionType.ts

@@ -0,0 +1,6 @@
+// @strict: true
+// @declaration: true
+
+declare function f<T>(args: typeof f<T>): T;
+declare function g<T = typeof g>(args: T): T;
+declare function h<T>(): typeof h<T>;

tests/cases/fourslash/quickInfoCircularInstantiationExpression.ts

@@ -0,0 +1,6 @@
+/// <reference path="fourslash.ts" />
+
+////declare function foo<T>(t: T): typeof foo<T>;
+/////**/foo("");
+
+verify.baselineQuickInfo();