hxt-9.0.1: A collection of tools for processing XML with Haskell.Source codeContentsIndex
Text.XML.HXT.Arrow.XmlState.TraceHandling
Portabilityportable
Stabilitystable
MaintainerUwe Schmidt (uwe@fh-wedel.de)
Description
the trace arrows
Synopsis
setTraceLevel :: Int -> IOStateArrow s b b
getTraceLevel :: IOStateArrow s b Int
setTraceCmd :: (Int -> String -> IO ()) -> IOStateArrow s b b
getTraceCmd :: IOStateArrow a b (Int -> String -> IO ())
withTraceLevel :: Int -> IOStateArrow s b c -> IOStateArrow s b c
trace :: Int -> IOStateArrow s b String -> IOStateArrow s b b
traceValue :: Int -> (b -> String) -> IOStateArrow s b b
traceString :: Int -> (b -> String) -> IOStateArrow s b b
traceMsg :: Int -> String -> IOStateArrow s b b
traceSource :: IOStateArrow s XmlTree XmlTree
traceTree :: IOStateArrow s XmlTree XmlTree
traceDoc :: String -> IOStateArrow s XmlTree XmlTree
traceOutputToStderr :: Int -> String -> IO ()
Documentation
setTraceLevel :: Int -> IOStateArrow s b bSource
set the global trace level
getTraceLevel :: IOStateArrow s b IntSource
read the global trace level
setTraceCmd :: (Int -> String -> IO ()) -> IOStateArrow s b bSource
set the global trace command. This command does the trace output
getTraceCmd :: IOStateArrow a b (Int -> String -> IO ())Source
acces the command for trace output
withTraceLevel :: Int -> IOStateArrow s b c -> IOStateArrow s b cSource
run an arrow with a given trace level, the old trace level is restored after the arrow execution
trace :: Int -> IOStateArrow s b String -> IOStateArrow s b bSource
apply a trace arrow and issue message to stderr
traceValue :: Int -> (b -> String) -> IOStateArrow s b bSource

trace the current value transfered in a sequence of arrows.

The value is formated by a string conversion function. This is a substitute for the old and less general traceString function

traceString :: Int -> (b -> String) -> IOStateArrow s b bSource
an old alias for traceValue
traceMsg :: Int -> String -> IOStateArrow s b bSource
issue a string message as trace
traceSource :: IOStateArrow s XmlTree XmlTreeSource

issue the source representation of a document if trace level >= 3

for better readability the source is formated with indentDoc

traceTree :: IOStateArrow s XmlTree XmlTreeSource
issue the tree representation of a document if trace level >= 4
traceDoc :: String -> IOStateArrow s XmlTree XmlTreeSource
trace a main computation step issue a message when trace level >= 1, issue document source if level >= 3, issue tree when level is >= 4
traceOutputToStderr :: Int -> String -> IO ()Source
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