isIDStart
A Boolean value indicating whether the scalar is one which is recommended to be allowed to appear in a starting position in a programming language identifier.
Declaration
var isIDStart: Bool { get }Discussion
Applications that store identifiers in NFKC normalized form should instead use isXIDStart to check whether a scalar is a valid identifier character.
This property corresponds to the “ID_Start” and the “Other_ID_Start” properties in the Unicode Standard.