Sigbjorn Finne wrote:
Hi Wilkes,
you may want to have a look at a simple example of how to
interop with Windows WMI using the COM package at --
http://haskell.forkio.com/com-examples
I try compile WMIDemo.hs but recive error:
[code]
c:\htest>ghc --make WMIDemo.hs
[2 of 2] Compiling WMIDemo ( WMIDemo.hs, WMIDemo.o )
WMIDemo.hs:24:2:
Couldn't match expected type `[a]' against inferred type `(a1, b)'
In the pattern: (_, ls)
In a stmt of a 'do' expression: (_, ls) <- is # enumVariants
In the second argument of `($)', namely
`do obj <- Auto.getObject "winmgmts:\\\\.\\root\\CIMV2"
is <- obj
# instancesOf
"Win32_OperatingSystem"
(Nothing :: Maybe Int)
(Nothing :: Maybe (IDispatch ()))
(_, ls) <- is # enumVariants
case ls of {
[]
-> fail "Hmm..no OS information available; expected at
least one."
(wmi_os : _) -> do ... }'
[/code]
ghc 6.10.1
com-1.2.1
Windows Vista Home Ru + sp1
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