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42 строки
1.1 KiB
Plaintext
42 строки
1.1 KiB
Plaintext
Tracing:
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Debug.Trace:
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http://eax.me/haskell-debug-trace/
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http://hackage.haskell.org/packages/archive/base/latest/doc/html/src/Debug-Trace.html
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traceShow
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tracer:
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http://hackage.haskell.org/package/tracer
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https://github.com/knz/hs-tracer
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HAT:
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http://hackage.haskell.org/package/hat (http://olafchitil.github.com/hat)
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http://hackage.haskell.org/package/loch-th (https://github.com/liskin/loch-th)
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http://hackage.haskell.org/package/file-location (https://github.com/gregwebs/FileLocation.hs)
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http://hackage.haskell.org/package/trace-function-call
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http://hackage.haskell.org/package/trace-call
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Debug.HTrace:
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http://hackage.haskell.org/package/htrace (https://github.com/jkff/htrace)
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module Debug.HTrace (htrace) where
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import Data.List (foldl')
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import Data.IORef
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import System.IO.Unsafe
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level = unsafePerformIO $ newIORef 0
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-- | Trace "str" on a separate line, and increase indentation of subsequent
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-- traces while x is being evaluated.
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htrace str x = unsafePerformIO $ do
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lvl <- readIORef level
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putStrLn (replicate (2*lvl) ' ' ++ str)
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writeIORef level (lvl+1)
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let !vx = x
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writeIORef level lvl
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return vx
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