On 2008 Nov 18, at 17:55, Kyongho Min wrote:
I am working on a command-driven tool (::IO ()).
If the system invokes itself again, and the system's returned
data type would be 'IO a', say (IO Exp) (Expression).
tool:: a -> IO()
The nested tool invocation returns (IO Exp) to the previous tool.
I am using dynamic error exception handling like (throwDyn exp).
If I use 'forkIO', then it works for this situation (e.g. IO Exp)
but it is not working for 'quit' command (quit the tool:: thread
blocked indefinitely) - quit the subtool and return to the previous
tool.
Consider using a special type of dynamic exception to mean "quit".
--
brandon s. allbery [solaris,freebsd,perl,pugs,haskell] [EMAIL PROTECTED]
system administrator [openafs,heimdal,too many hats] [EMAIL PROTECTED]
electrical and computer engineering, carnegie mellon university KF8NH
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