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GHC 10.0.0.20260917 · lts/ghc-10.0.x · 8fef28d · 2026-11-02

Modulelog-base-0.12.1.0Haskell2010

Log.Data

Basic data types used throughout the package.

Synopsis

data LogLevel
value showLogLevel
value readLogLevel
value readLogLevelEither
data LogMessage
value showLogMessage
value defaultLogLevel

Packagelog-base-0.12.1.0
Exports7
LanguageHaskell2010
LicenceBSD-3-Clause
SourceData.hs

datadata LogLevel

Available log levels. Note that ordering in this definintion determines what the maximum log level is. See Log.Monad.leMaxLogLevel.

LogAttention LogInfo LogTrace

Instances7Bounded, Eq, Ord, Show, NFData, FromJSON, …

Bounded LogLevelDefined in log-base-0.12.1.0 · Log.Data
Eq LogLevelDefined in log-base-0.12.1.0 · Log.Data
Ord LogLevelDefined in log-base-0.12.1.0 · Log.Data
Show LogLevelDefined in log-base-0.12.1.0 · Log.Data
NFData LogLevelDefined in log-base-0.12.1.0 · Log.Data
FromJSON LogLevelDefined in log-base-0.12.1.0 · Log.Data
ToJSON LogLevelDefined in log-base-0.12.1.0 · Log.Data

valueshowLogLevel :: LogLevel -> Text

valuereadLogLevel :: Text -> LogLevel

This function is partial.

valuereadLogLevelEither :: Text -> Either String LogLevel

datadata LogMessage

Represents message to be logged.

Constructors

LogMessage
- lmComponent :: !Text
  Component of an application.
- lmDomain :: ![Text]
  Application log domain.
- lmTime :: !UTCTime
  Time of the logged event.
- lmLevel :: !LogLevel
  Log level.
- lmMessage :: !Text
  Message to be logged.
- lmData :: !Value
  Additional data associated with the message.

Instances5Eq, Show, NFData, FromJSON, ToJSON

Eq LogMessageDefined in log-base-0.12.1.0 · Log.Data
Show LogMessageDefined in log-base-0.12.1.0 · Log.Data
NFData LogMessageDefined in log-base-0.12.1.0 · Log.Data
FromJSON LogMessageDefined in log-base-0.12.1.0 · Log.Data
ToJSON LogMessageDefined in log-base-0.12.1.0 · Log.Data

valueshowLogMessage

:: Maybe UTCTime
The time that message was added to the log.
-> LogMessage
The actual message.
-> Text

Render a LogMessage to Text.

valuedefaultLogLevel :: LogLevel

The default log level. Returns LogInfo.