ParseLogLevel parses incoming string into a Level and returns LevelUndefined with an error if an unknown logging level was passed.

EndOfLevel just defines a maximum level + 1.

LevelDebug means a message non-essential for the end user, but useful for debugging the application by its developer.

LevelError means an error case (not a critical problem, but yet an error).

LevelFatal means non-recoverable error case.

LevelInfo means an information message, essential enough to notify the end user (who is not a developer of the application), but about something benign and that does not says to any wrong behavior of the application.

LevelNone means to do not log anything.

LevelPanic means a panic case (basically a recoverable, but critical problem).

LevelTrace is for all other messages.

LevelUndefined is an erroneous value of log-level which just corresponds to the zero-value.

LevelWarning means an odd/unexpected/wrong/undesired/etc case.

DefaultGetCallerFunc is the default GetCallerPC function.

Config is a resulting configuration of a collection of Options.

Entry a single log entry to be logged/written.

PreHookResult is a result of computations returned by a PreHook.

Emitter is a log entry sender.

Flusher defines a method to flush all buffers.

Hook is a pre-processor for log entries.

Logger is an abstract generic structured logger.

Option is an abstract option which changes the behavior of a Logger.

PreHook is executed very early in a Logger, allowing to discard or change an Entry before any essential computations are done.

Emitters is a set of Emitter-s.

EntryProperties is a collection of EntryProperty-es.

EntryProperty defines special implementation-specific behavior related to a specific Entry.

GetCallerPC is a function which returns the Program Counter (PC) of the piece of code which invoked logging the entry.

Hooks is a collection of Hook-s.

Level is a severity of a message/Entry.

OptionGetCallerFunc overrides GetCallerPC (see description of "GetCallerPC").

Options is a collection of Option-s.

PreHooks is a collection of PreHook-s.