Properly handle private and protected properties in intersections #13990
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With this PR we properly handle
privateandprotectedproperties in intersection types. This fixes several issues related to use ofprivateandprotectedin mixins (which use intersections to construct the resulting types).This PR also introduces a new
CheckFlagsenum type representing bit flags that are present in everyTransientSymbol(i.e. every symbol created by the type checker) and moves theInstantiatedandSyntheticPropertyflags fromSymbolFlagsto the newCheckFlags. Furthermore, theMergedflag is removed fromSymbolFlagssince theTransientflag already provides the same information.Fixes #13830.
Fixes #13924.