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Merged
ahejlsberg merged 22 commits into from
Apr 12, 2019
Merged

Improve soundness of indexed access types #30769

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fc95dc4
Improve soundness of indexed access type relations
ahejlsberg Mar 29, 2019
5de3ee8
getIndexedAccessType for assignment target uses intersections
ahejlsberg Mar 30, 2019
95c8a92
Add getIndexedAccessOrUndefined function
ahejlsberg Mar 31, 2019
3e09d29
Accept new baselines
ahejlsberg Mar 31, 2019
d61a693
More exploration of indexed access type constraints in type relations
ahejlsberg Apr 2, 2019
1648d0c
Minor fixes
ahejlsberg Apr 2, 2019
e79e0bd
Accept new baselines
ahejlsberg Apr 2, 2019
d69aeb4
T[K] ignores index signatures in T's constraint
ahejlsberg Apr 4, 2019
f5f1f30
Accept new baselines
ahejlsberg Apr 4, 2019
739acee
Add tests
ahejlsberg Apr 4, 2019
e01fa85
Accept new baselines
ahejlsberg Apr 4, 2019
2945802
Merge branch 'master' into saferIndexedAccessTypes
ahejlsberg Apr 6, 2019
9832a83
Accept new baselines
ahejlsberg Apr 6, 2019
e1fd5e5
Fix unsafe parameter coercions related to PragmaPseudoMap
ahejlsberg Apr 6, 2019
b49a343
Simplify obtaining base constraint of T[K] for writing
ahejlsberg Apr 8, 2019
71f3e1f
Accept new baselines
ahejlsberg Apr 8, 2019
eb1e7ec
Optimize T[K] where T has string index signature and no other members
ahejlsberg Apr 8, 2019
6851268
Accept new baselines
ahejlsberg Apr 8, 2019
fa407ce
Remove old comment
ahejlsberg Apr 9, 2019
c8ff4bd
Properly filter mapped types in getIndexType with noIndexSignatures=true
ahejlsberg Apr 10, 2019
68eb7b9
Add test
ahejlsberg Apr 10, 2019
6785472
Accept new baselines
ahejlsberg Apr 10, 2019
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Properly filter mapped types in getIndexType with noIndexSignatures=true
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@ahejlsberg
ahejlsberg committed Apr 10, 2019
commit c8ff4bd9b30b8ef480059a17db712beb4a77b89a
2 changes: 1 addition & 1 deletion src/compiler/checker.ts
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Expand Up @@ -9848,7 +9848,7 @@ namespace ts {
return type.flags & TypeFlags.Union ? getIntersectionType(map((<IntersectionType>type).types, t => getIndexType(t, stringsOnly, noIndexSignatures))) :
type.flags & TypeFlags.Intersection ? getUnionType(map((<IntersectionType>type).types, t => getIndexType(t, stringsOnly, noIndexSignatures))) :
maybeTypeOfKind(type, TypeFlags.InstantiableNonPrimitive) ? getIndexTypeForGenericType(<InstantiableType | UnionOrIntersectionType>type, stringsOnly) :
getObjectFlags(type) & ObjectFlags.Mapped ? getConstraintTypeFromMappedType(<MappedType>type) :
getObjectFlags(type) & ObjectFlags.Mapped ? filterType(getConstraintTypeFromMappedType(<MappedType>type), t => !(noIndexSignatures && t.flags & (TypeFlags.Any | TypeFlags.String | TypeFlags.Number))) :
type === wildcardType ? wildcardType :
type.flags & TypeFlags.Any ? keyofConstraintType :
stringsOnly ? !noIndexSignatures && getIndexInfoOfType(type, IndexKind.String) ? stringType : getLiteralTypeFromProperties(type, TypeFlags.StringLiteral) :
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