Enumerationswift-log 1.6.2Logging

    MetadataValue

    A logging metadata value. Logger.MetadataValue is string, array, and dictionary literal convertible.

    Logging.swift:820
    enum MetadataValue
    Mangled symbol
    s7Logging6LoggerV13MetadataValueO What are these?
    FNV24 hash
    9FUXG

    MetadataValue provides convenient conformances to ExpressibleByStringInterpolation, ExpressibleByStringLiteral, ExpressibleByArrayLiteral, and ExpressibleByDictionaryLiteral which means that when constructing MetadataValues you should default to using Swift’s usual literals.

    Examples:

    • prefer logger.info("user logged in", metadata: ["user-id": "\(user.id)"]) over ..., metadata: ["user-id": .string(user.id.description)])

    • prefer logger.info("user selected colors", metadata: ["colors": ["\(user.topColor)", "\(user.secondColor)"]]) over ..., metadata: ["colors": .array([.string("\(user.topColor)"), .string("\(user.secondColor)")])

    • prefer logger.info("nested info", metadata: ["nested": ["fave-numbers": ["\(1)", "\(2)", "\(3)"], "foo": "bar"]]) over ..., metadata: ["nested": .dictionary(["fave-numbers": ...])])