Anders Hejlsberg be4b814a4c Reduce intersections by discriminants (#36696) ... * Treat never-like intersections as never * Accept new baselines * Fix compiler issues revealed by increased intersection correctness * Delete fourslash tests that are no longer applicable * Include isNeverLikeIntersection check in getNormalizedType * Erase never-like types in several more places * Check that base types are not never-like * Add comments * Revert isNeverLikeType check in getIndexType (keyof shouldn't resolve member types) * Introduce getReducedType for union and intersection types * Don't reduce in getApparentType * Avoid relationship check in resolveMappedTypeMembers * Accept new baselines * Don't call getReducedType in getIndexType * Ensure reduced and unreduced forms of a type can compare identical * Reduce types before converting them to string representation * Accept new baselines * Reduce intersections before obtaining keyof X * Add tests * Accept new baselines * Fix comment in tests * Don't infer from empty intersection types * Add tests * Accept new baselines * Defer instantiation of mapped type property types * Accept new baselines * Include more precise type in diagnostic * Accept new baselines * Minor optimization * Improve error message * Optional properties in intersections are never discriminants		2020-02-28 17:06:44 -08:00
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contextualTypeWithUnionTypeCallSignatures.ts
contextualTypeWithUnionTypeIndexSignatures.ts	Use string/number signature to get contextual type	2018-10-11 15:12:13 -07:00
contextualTypeWithUnionTypeMembers.ts
contextualTypeWithUnionTypeObjectLiteral.ts
discriminatedUnionTypes1.ts	[Transforms] Merging Master to Transforms on 06/21 (#9294)	2016-07-11 12:41:12 -07:00
discriminatedUnionTypes2.ts	Reduce intersections by discriminants (#36696)	2020-02-28 17:06:44 -08:00
unionTypeCallSignatures.ts	Allow union signatures to merge when they have differing argument counts (#28604)	2018-11-19 17:05:28 -08:00
unionTypeCallSignatures2.ts	Addressing CR feedback	2015-08-06 17:17:20 -07:00
unionTypeCallSignatures3.ts	Adding new test	2015-08-07 08:06:10 -07:00
unionTypeCallSignatures4.ts	Allow union signatures to merge when they have differing argument counts (#28604)	2018-11-19 17:05:28 -08:00
unionTypeCallSignatures5.ts	Don’t crash when creating a union signature from signatures that do and don’t have this types	2019-05-22 17:42:05 -07:00
unionTypeCallSignatures6.ts	Intersect 'this' types in union signatures (#32538)	2019-07-26 14:56:03 -07:00
unionTypeConstructSignatures.ts	Allow union signatures to merge when they have differing argument counts (#28604)	2018-11-19 17:05:28 -08:00
unionTypeEquivalence.ts
unionTypeFromArrayLiteral.ts	Array literal produces union type if the it is not contextually typed	2014-11-04 15:58:44 -08:00
unionTypeIndexSignature.ts
unionTypeMembers.ts
unionTypePropertyAccessibility.ts	Adding test	2015-04-16 14:41:33 -07:00
unionTypeReadonly.ts	[Transforms] Merge master 07/11 into transform (#9697)	2016-07-18 15:38:30 -07:00
unionTypeReduction.ts	Adding test	2015-04-12 10:52:20 -07:00
unionTypeReduction2.ts	Increase selectivity of subtype relationship for signatures (#35659)	2019-12-20 14:52:22 -08:00
unionTypeWithIndexSignature.ts	Index signatures contribute properties to unions (#25307)	2018-07-06 10:46:05 -07:00