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Within LTS Haskell 24.45 (ghc-9.10.3)
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type
LogFormatter a = a -> LogRecord -> String -> IO Stringhslogger System.Log.Formatter A LogFormatter is used to format log messages. Note that it is paramterized on the Handler to allow the formatter to use information specific to the handler (an example of can be seen in the formatter used in Syslog)
nullFormatter :: LogFormatter ahslogger System.Log.Formatter Returns the passed message as is, ie. no formatting is done.
simpleLogFormatter :: String -> LogFormatter ahslogger System.Log.Formatter Takes a format string, and returns a formatter that may be used to format log messages. The format string may contain variables prefixed with a $-sign which will be replaced at runtime with corresponding values. The currently supported variables are:
- $msg - The actual log message
- $loggername - The name of the logger
- $prio - The priority level of the message
- $tid - The thread ID
- $pid - Process ID (Not available on windows)
- $time - The current time
- $utcTime - The current time in UTC Time
tfLogFormatter :: String -> String -> LogFormatter ahslogger System.Log.Formatter Like simpleLogFormatter but allow the time format to be specified in the first parameter (this is passed to formatTime)
varFormatter :: [(String, IO String)] -> String -> LogFormatter ahslogger System.Log.Formatter An extensible formatter that allows new substition variables to be defined. Each variable has an associated IO action that is used to produce the string to substitute for the variable name. The predefined variables are the same as for simpleLogFormatter excluding $time and $utcTime.
getFormatter :: LogHandler a => a -> LogFormatter ahslogger System.Log.Handler No documentation available.
setFormatter :: LogHandler a => a -> LogFormatter a -> ahslogger System.Log.Handler Set a log formatter to customize the log format for this Handler
showCmdSpecForUser :: CmdSpec -> Stringprocess-extras System.Process.Common No documentation available.
showCreateProcessForUser :: CreateProcess -> Stringprocess-extras System.Process.Common System.Process utility functions.
showProcessMakerForUser :: ProcessMaker a => a -> Stringprocess-extras System.Process.Common No documentation available.