Action that prints String to stdout. This action does not flush the output buffer. If buffering mode is block buffering, the effect of this action can be delayed.
logStringStdout <& "foo"foo
Moduleco-log-core-0.3.2.7Haskell2010
Colog.Core.IO
SPDX-License-Identifier : MPL-2.0 Maintainer : Co-Log xrom.xkov@gmail.com Stability : Stable Portability : Portable
Introduces logging actions working in MonadIO. These actions are very basic
and inefficient because they use the String data type. If you don't want to
have extra dependencies and performance of logging is not the bottleneck of your
application, then these functions should be enough. Otherwise use functions from
the Colog.Actions module from the co-log package.
Synopsis
- value logStringStdout
- value logStringStderr
- value logStringHandle
- value withLogStringFile
- value logPrint
- value logPrintStderr
- value logPrintHandle
- value withLogPrintFile
- value liftLogIO
- value logFlush
- Packageco-log-core-0.3.2.7
- Exports10
- LanguageHaskell2010
- LicenceMPL-2.0
- SourceIO.hs
String actions
Action that prints String to stderr. This action does not flush the output buffer. If buffering mode is block buffering, the effect of this action can be delayed.
logStringStderr <& "foo"foo
Action that prints String to file. Instead of returning LogAction it's implemented in continuation-passing style because it's more efficient to open file only once at the start of the application and write to Handle instead of opening file each time we need to write to it.
Opens file in AppendMode. Automatically flushes the output buffer.
logger action = action <& "foo"withLogStringFile "/dev/stdout" loggerfoo
Show actions
Action that prints to stdout using Show. This action does not flush the output buffer. If buffering mode is block buffering, the effect of this action can be delayed.
logPrint <& 55
Action that prints to stderr using Show. This action does not flush the output buffer. If buffering mode is block buffering, the effect of this action can be delayed.
logPrintStderr <& 55
Action that prints to a file using Show. See withLogStringFile for details.
Various combinators
Lifts a LogAction over IO into a more general Monad.
logToStdout = LogAction putStrLnliftLogIO logToStdout <& "foo"foo
This action can be used in combination with other actions to flush a handle every time you log anything.