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ahejlsbergahejlsberg
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Merge pull request #4464 from Microsoft/cacheTypeInstantiations
Cache anonymous object type instantiations
2 parents d29c210 + 32f37bb commit bbaf322

10 files changed

+187
-0
lines changed

‎src/compiler/checker.ts

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@@ -4487,6 +4487,15 @@ namespace ts {
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}
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function instantiateAnonymousType(type: ObjectType, mapper: TypeMapper): ObjectType {
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if (mapper.instantiations) {
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let cachedType = mapper.instantiations[type.id];
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if (cachedType) {
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return cachedType;
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}
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}
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else {
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mapper.instantiations = [];
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}
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// Mark the anonymous type as instantiated such that our infinite instantiation detection logic can recognize it
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let result = <ResolvedType>createObjectType(TypeFlags.Anonymous | TypeFlags.Instantiated, type.symbol);
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result.properties = instantiateList(getPropertiesOfObjectType(type), mapper, instantiateSymbol);
@@ -4497,6 +4506,7 @@ namespace ts {
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let numberIndexType = getIndexTypeOfType(type, IndexKind.Number);
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if (stringIndexType) result.stringIndexType = instantiateType(stringIndexType, mapper);
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if (numberIndexType) result.numberIndexType = instantiateType(numberIndexType, mapper);
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mapper.instantiations[type.id] = result;
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return result;
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}
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‎src/compiler/types.ts

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@@ -1953,6 +1953,7 @@ namespace ts {
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/* @internal */
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export interface TypeMapper {
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(t: TypeParameter): Type;
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instantiations?: Type[]; // Cache of instantiations created using this type mapper.
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context?: InferenceContext; // The inference context this mapper was created from.
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// Only inference mappers have this set (in createInferenceMapper).
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// The identity mapper and regular instantiation mappers do not need it.

‎tests/baselines/reference/typeArgumentInferenceWithRecursivelyReferencedTypeAliasToTypeLiteral01.js

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//// [typeArgumentInferenceWithRecursivelyReferencedTypeAliasToTypeLiteral01.ts]
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type TreeNode = {
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name: string;
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parent: TreeNode;
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}
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var nodes: TreeNode[];
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nodes.map(n => n.name);
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//// [typeArgumentInferenceWithRecursivelyReferencedTypeAliasToTypeLiteral01.js]
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var nodes;
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nodes.map(function (n) { return n.name; });

‎tests/baselines/reference/typeArgumentInferenceWithRecursivelyReferencedTypeAliasToTypeLiteral01.symbols

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=== tests/cases/compiler/typeArgumentInferenceWithRecursivelyReferencedTypeAliasToTypeLiteral01.ts ===
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type TreeNode = {
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>TreeNode : Symbol(TreeNode, Decl(typeArgumentInferenceWithRecursivelyReferencedTypeAliasToTypeLiteral01.ts, 0, 0))
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name: string;
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>name : Symbol(name, Decl(typeArgumentInferenceWithRecursivelyReferencedTypeAliasToTypeLiteral01.ts, 0, 17))
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parent: TreeNode;
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>parent : Symbol(parent, Decl(typeArgumentInferenceWithRecursivelyReferencedTypeAliasToTypeLiteral01.ts, 1, 17))
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>TreeNode : Symbol(TreeNode, Decl(typeArgumentInferenceWithRecursivelyReferencedTypeAliasToTypeLiteral01.ts, 0, 0))
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}
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var nodes: TreeNode[];
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>nodes : Symbol(nodes, Decl(typeArgumentInferenceWithRecursivelyReferencedTypeAliasToTypeLiteral01.ts, 5, 3))
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>TreeNode : Symbol(TreeNode, Decl(typeArgumentInferenceWithRecursivelyReferencedTypeAliasToTypeLiteral01.ts, 0, 0))
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nodes.map(n => n.name);
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>nodes.map : Symbol(Array.map, Decl(lib.d.ts, 1115, 92))
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>nodes : Symbol(nodes, Decl(typeArgumentInferenceWithRecursivelyReferencedTypeAliasToTypeLiteral01.ts, 5, 3))
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>map : Symbol(Array.map, Decl(lib.d.ts, 1115, 92))
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>n : Symbol(n, Decl(typeArgumentInferenceWithRecursivelyReferencedTypeAliasToTypeLiteral01.ts, 6, 10))
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>n.name : Symbol(name, Decl(typeArgumentInferenceWithRecursivelyReferencedTypeAliasToTypeLiteral01.ts, 0, 17))
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>n : Symbol(n, Decl(typeArgumentInferenceWithRecursivelyReferencedTypeAliasToTypeLiteral01.ts, 6, 10))
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>name : Symbol(name, Decl(typeArgumentInferenceWithRecursivelyReferencedTypeAliasToTypeLiteral01.ts, 0, 17))
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‎tests/baselines/reference/typeArgumentInferenceWithRecursivelyReferencedTypeAliasToTypeLiteral01.types

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=== tests/cases/compiler/typeArgumentInferenceWithRecursivelyReferencedTypeAliasToTypeLiteral01.ts ===
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type TreeNode = {
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>TreeNode : { name: string; parent: TreeNode; }
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name: string;
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>name : string
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parent: TreeNode;
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>parent : { name: string; parent: TreeNode; }
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>TreeNode : { name: string; parent: TreeNode; }
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}
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var nodes: TreeNode[];
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>nodes : { name: string; parent: TreeNode; }[]
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>TreeNode : { name: string; parent: TreeNode; }
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nodes.map(n => n.name);
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>nodes.map(n => n.name) : string[]
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>nodes.map : <U>(callbackfn: (value: { name: string; parent: TreeNode; }, index: number, array: { name: string; parent: TreeNode; }[]) => U, thisArg?: any) => U[]
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>nodes : { name: string; parent: TreeNode; }[]
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>map : <U>(callbackfn: (value: { name: string; parent: TreeNode; }, index: number, array: { name: string; parent: TreeNode; }[]) => U, thisArg?: any) => U[]
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>n => n.name : (n: { name: string; parent: TreeNode; }) => string
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>n : { name: string; parent: TreeNode; }
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>n.name : string
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>n : { name: string; parent: TreeNode; }
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>name : string
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‎tests/baselines/reference/typeArgumentInferenceWithRecursivelyReferencedTypeAliasToTypeLiteral02.js

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//// [typeArgumentInferenceWithRecursivelyReferencedTypeAliasToTypeLiteral02.ts]
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type TreeNode = {
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name: string;
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parent: TreeNode;
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}
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type TreeNodeMiddleman = {
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name: string;
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parent: TreeNode;
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}
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var nodes: TreeNodeMiddleman[];
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nodes.map(n => n.name);
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//// [typeArgumentInferenceWithRecursivelyReferencedTypeAliasToTypeLiteral02.js]
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var nodes;
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nodes.map(function (n) { return n.name; });

‎tests/baselines/reference/typeArgumentInferenceWithRecursivelyReferencedTypeAliasToTypeLiteral02.symbols

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=== tests/cases/compiler/typeArgumentInferenceWithRecursivelyReferencedTypeAliasToTypeLiteral02.ts ===
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type TreeNode = {
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>TreeNode : Symbol(TreeNode, Decl(typeArgumentInferenceWithRecursivelyReferencedTypeAliasToTypeLiteral02.ts, 0, 0))
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name: string;
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>name : Symbol(name, Decl(typeArgumentInferenceWithRecursivelyReferencedTypeAliasToTypeLiteral02.ts, 0, 17))
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parent: TreeNode;
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>parent : Symbol(parent, Decl(typeArgumentInferenceWithRecursivelyReferencedTypeAliasToTypeLiteral02.ts, 1, 17))
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>TreeNode : Symbol(TreeNode, Decl(typeArgumentInferenceWithRecursivelyReferencedTypeAliasToTypeLiteral02.ts, 0, 0))
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}
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type TreeNodeMiddleman = {
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>TreeNodeMiddleman : Symbol(TreeNodeMiddleman, Decl(typeArgumentInferenceWithRecursivelyReferencedTypeAliasToTypeLiteral02.ts, 3, 1))
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name: string;
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>name : Symbol(name, Decl(typeArgumentInferenceWithRecursivelyReferencedTypeAliasToTypeLiteral02.ts, 5, 26))
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parent: TreeNode;
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>parent : Symbol(parent, Decl(typeArgumentInferenceWithRecursivelyReferencedTypeAliasToTypeLiteral02.ts, 6, 17))
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>TreeNode : Symbol(TreeNode, Decl(typeArgumentInferenceWithRecursivelyReferencedTypeAliasToTypeLiteral02.ts, 0, 0))
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}
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var nodes: TreeNodeMiddleman[];
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>nodes : Symbol(nodes, Decl(typeArgumentInferenceWithRecursivelyReferencedTypeAliasToTypeLiteral02.ts, 10, 3))
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>TreeNodeMiddleman : Symbol(TreeNodeMiddleman, Decl(typeArgumentInferenceWithRecursivelyReferencedTypeAliasToTypeLiteral02.ts, 3, 1))
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nodes.map(n => n.name);
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>nodes.map : Symbol(Array.map, Decl(lib.d.ts, 1115, 92))
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>nodes : Symbol(nodes, Decl(typeArgumentInferenceWithRecursivelyReferencedTypeAliasToTypeLiteral02.ts, 10, 3))
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>map : Symbol(Array.map, Decl(lib.d.ts, 1115, 92))
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>n : Symbol(n, Decl(typeArgumentInferenceWithRecursivelyReferencedTypeAliasToTypeLiteral02.ts, 11, 10))
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>n.name : Symbol(name, Decl(typeArgumentInferenceWithRecursivelyReferencedTypeAliasToTypeLiteral02.ts, 5, 26))
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>n : Symbol(n, Decl(typeArgumentInferenceWithRecursivelyReferencedTypeAliasToTypeLiteral02.ts, 11, 10))
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>name : Symbol(name, Decl(typeArgumentInferenceWithRecursivelyReferencedTypeAliasToTypeLiteral02.ts, 5, 26))
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‎tests/baselines/reference/typeArgumentInferenceWithRecursivelyReferencedTypeAliasToTypeLiteral02.types

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=== tests/cases/compiler/typeArgumentInferenceWithRecursivelyReferencedTypeAliasToTypeLiteral02.ts ===
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type TreeNode = {
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>TreeNode : { name: string; parent: TreeNode; }
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name: string;
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>name : string
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parent: TreeNode;
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>parent : { name: string; parent: TreeNode; }
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>TreeNode : { name: string; parent: TreeNode; }
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}
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type TreeNodeMiddleman = {
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>TreeNodeMiddleman : { name: string; parent: { name: string; parent: TreeNode; }; }
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name: string;
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>name : string
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parent: TreeNode;
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>parent : { name: string; parent: TreeNode; }
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>TreeNode : { name: string; parent: TreeNode; }
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}
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var nodes: TreeNodeMiddleman[];
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>nodes : { name: string; parent: { name: string; parent: TreeNode; }; }[]
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>TreeNodeMiddleman : { name: string; parent: { name: string; parent: TreeNode; }; }
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nodes.map(n => n.name);
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>nodes.map(n => n.name) : string[]
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>nodes.map : <U>(callbackfn: (value: { name: string; parent: { name: string; parent: TreeNode; }; }, index: number, array: { name: string; parent: { name: string; parent: TreeNode; }; }[]) => U, thisArg?: any) => U[]
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>nodes : { name: string; parent: { name: string; parent: TreeNode; }; }[]
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>map : <U>(callbackfn: (value: { name: string; parent: { name: string; parent: TreeNode; }; }, index: number, array: { name: string; parent: { name: string; parent: TreeNode; }; }[]) => U, thisArg?: any) => U[]
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>n => n.name : (n: { name: string; parent: { name: string; parent: TreeNode; }; }) => string
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>n : { name: string; parent: { name: string; parent: TreeNode; }; }
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>n.name : string
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>n : { name: string; parent: { name: string; parent: TreeNode; }; }
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>name : string
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‎tests/cases/compiler/typeArgumentInferenceWithRecursivelyReferencedTypeAliasToTypeLiteral01.ts

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type TreeNode = {
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name: string;
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parent: TreeNode;
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}
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var nodes: TreeNode[];
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nodes.map(n => n.name);

‎tests/cases/compiler/typeArgumentInferenceWithRecursivelyReferencedTypeAliasToTypeLiteral02.ts

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type TreeNode = {
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name: string;
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parent: TreeNode;
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}
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type TreeNodeMiddleman = {
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name: string;
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parent: TreeNode;
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}
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var nodes: TreeNodeMiddleman[];
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nodes.map(n => n.name);

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