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Filtering mapped types declarations #51650

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Merged
merged 7 commits into from
Feb 16, 2023
Merged

Filtering mapped types declarations #51650

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6791d39
Add declarations to filtering mapped types
Andarist Nov 26, 2022
fde7b0a
update baselines
Andarist Nov 26, 2022
7741604
Update tests/cases/fourslash/goToDefinition_filteringMappedType.ts
Andarist Nov 27, 2022
a1e5700
Add find all references test
Andarist Dec 6, 2022
93f65ac
Merge remote-tracking branch 'origin/main' into filtering-mapped-type…
Andarist Dec 26, 2022
bf58389
Merge remote-tracking branch 'origin/main' into filtering-mapped-type…
Andarist Jan 16, 2023
19e340b
Merge remote-tracking branch 'origin/main' into filtering-mapped-type…
Andarist Feb 13, 2023
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5 changes: 2 additions & 3 deletions src/compiler/checker.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -13042,6 +13042,7 @@ export function createTypeChecker(host: TypeCheckerHost): TypeChecker {
const typeParameter = getTypeParameterFromMappedType(type);
const constraintType = getConstraintTypeFromMappedType(type);
const nameType = getNameTypeFromMappedType(type.target as MappedType || type);
const isFilteringMappedType = nameType && isTypeAssignableTo(nameType, typeParameter);
const templateType = getTemplateTypeFromMappedType(type.target as MappedType || type);
const modifiersType = getApparentType(getModifiersTypeFromMappedType(type)); // The 'T' in 'keyof T'
const templateModifiers = getMappedTypeModifiers(type);
Expand Down Expand Up @@ -13088,9 +13089,7 @@ export function createTypeChecker(host: TypeCheckerHost): TypeChecker {
prop.links.keyType = keyType;
if (modifiersProp) {
prop.links.syntheticOrigin = modifiersProp;
// If the mapped type has an `as XXX` clause, the property name likely won't match the declaration name and
// multiple properties may map to the same name. Thus, we attach no declarations to the symbol.
prop.declarations = nameType ? undefined : modifiersProp.declarations;
prop.declarations = !nameType || isFilteringMappedType ? modifiersProp.declarations : undefined;
}
members.set(propName, prop);
}
Expand Down
284 changes: 284 additions & 0 deletions tests/baselines/reference/findAllReferencesFilteringMappedTypeProperty.baseline.jsonc
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@@ -0,0 +1,284 @@
// === /tests/cases/fourslash/findAllReferencesFilteringMappedTypeProperty.ts ===
// const obj = { /*FIND ALL REFS*/[|a|]: 1, b: 2 };
// const filtered: { [P in keyof typeof obj as P extends 'b' ? never : P]: 0; } = { [|a|]: 0 };
// filtered.[|a|];

[
{
"definition": {
"containerKind": "",
"containerName": "",
"fileName": "/tests/cases/fourslash/findAllReferencesFilteringMappedTypeProperty.ts",
"kind": "property",
"name": "(property) a: number",
"textSpan": {
"start": 14,
"length": 1
},
"displayParts": [
{
"text": "(",
"kind": "punctuation"
},
{
"text": "property",
"kind": "text"
},
{
"text": ")",
"kind": "punctuation"
},
{
"text": " ",
"kind": "space"
},
{
"text": "a",
"kind": "propertyName"
},
{
"text": ":",
"kind": "punctuation"
},
{
"text": " ",
"kind": "space"
},
{
"text": "number",
"kind": "keyword"
}
],
"contextSpan": {
"start": 14,
"length": 4
}
},
"references": [
{
"textSpan": {
"start": 14,
"length": 1
},
"fileName": "/tests/cases/fourslash/findAllReferencesFilteringMappedTypeProperty.ts",
"contextSpan": {
"start": 14,
"length": 4
},
"isWriteAccess": true,
"isDefinition": true
},
{
"textSpan": {
"start": 109,
"length": 1
},
"fileName": "/tests/cases/fourslash/findAllReferencesFilteringMappedTypeProperty.ts",
"contextSpan": {
"start": 109,
"length": 4
},
"isWriteAccess": true,
"isDefinition": false
},
{
"textSpan": {
"start": 126,
"length": 1
},
"fileName": "/tests/cases/fourslash/findAllReferencesFilteringMappedTypeProperty.ts",
"isWriteAccess": false,
"isDefinition": false
}
]
}
]

// === /tests/cases/fourslash/findAllReferencesFilteringMappedTypeProperty.ts ===
// const obj = { [|a|]: 1, b: 2 };
// const filtered: { [P in keyof typeof obj as P extends 'b' ? never : P]: 0; } = { /*FIND ALL REFS*/[|a|]: 0 };
// filtered.[|a|];

[
{
"definition": {
"containerKind": "",
"containerName": "",
"fileName": "/tests/cases/fourslash/findAllReferencesFilteringMappedTypeProperty.ts",
"kind": "property",
"name": "(property) a: number",
"textSpan": {
"start": 14,
"length": 1
},
"displayParts": [
{
"text": "(",
"kind": "punctuation"
},
{
"text": "property",
"kind": "text"
},
{
"text": ")",
"kind": "punctuation"
},
{
"text": " ",
"kind": "space"
},
{
"text": "a",
"kind": "propertyName"
},
{
"text": ":",
"kind": "punctuation"
},
{
"text": " ",
"kind": "space"
},
{
"text": "number",
"kind": "keyword"
}
],
"contextSpan": {
"start": 14,
"length": 4
}
},
"references": [
{
"textSpan": {
"start": 14,
"length": 1
},
"fileName": "/tests/cases/fourslash/findAllReferencesFilteringMappedTypeProperty.ts",
"contextSpan": {
"start": 14,
"length": 4
},
"isWriteAccess": true,
"isDefinition": false
},
{
"textSpan": {
"start": 109,
"length": 1
},
"fileName": "/tests/cases/fourslash/findAllReferencesFilteringMappedTypeProperty.ts",
"contextSpan": {
"start": 109,
"length": 4
},
"isWriteAccess": true,
"isDefinition": true
},
{
"textSpan": {
"start": 126,
"length": 1
},
"fileName": "/tests/cases/fourslash/findAllReferencesFilteringMappedTypeProperty.ts",
"isWriteAccess": false,
"isDefinition": false
}
]
}
]

// === /tests/cases/fourslash/findAllReferencesFilteringMappedTypeProperty.ts ===
// const obj = { [|a|]: 1, b: 2 };
// const filtered: { [P in keyof typeof obj as P extends 'b' ? never : P]: 0; } = { [|a|]: 0 };
// filtered./*FIND ALL REFS*/[|a|];

[
{
"definition": {
"containerKind": "",
"containerName": "",
"fileName": "/tests/cases/fourslash/findAllReferencesFilteringMappedTypeProperty.ts",
"kind": "property",
"name": "(property) a: number",
"textSpan": {
"start": 14,
"length": 1
},
"displayParts": [
{
"text": "(",
"kind": "punctuation"
},
{
"text": "property",
"kind": "text"
},
{
"text": ")",
"kind": "punctuation"
},
{
"text": " ",
"kind": "space"
},
{
"text": "a",
"kind": "propertyName"
},
{
"text": ":",
"kind": "punctuation"
},
{
"text": " ",
"kind": "space"
},
{
"text": "number",
"kind": "keyword"
}
],
"contextSpan": {
"start": 14,
"length": 4
}
},
"references": [
{
"textSpan": {
"start": 14,
"length": 1
},
"fileName": "/tests/cases/fourslash/findAllReferencesFilteringMappedTypeProperty.ts",
"contextSpan": {
"start": 14,
"length": 4
},
"isWriteAccess": true
},
{
"textSpan": {
"start": 109,
"length": 1
},
"fileName": "/tests/cases/fourslash/findAllReferencesFilteringMappedTypeProperty.ts",
"contextSpan": {
"start": 109,
"length": 4
},
"isWriteAccess": true
},
{
"textSpan": {
"start": 126,
"length": 1
},
"fileName": "/tests/cases/fourslash/findAllReferencesFilteringMappedTypeProperty.ts",
"isWriteAccess": false
}
]
}
]
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