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The back ends should use the function nnheader-report
to report
error conditions--they should not raise errors when they aren't able to
perform a request. The first argument to this function is the back end
symbol, and the rest are interpreted as arguments to format
if
there are multiple of them, or just a string if there is one of them.
This function must always returns nil
.
(nnheader-report 'nnchoke "You did something totally bogus") (nnheader-report 'nnchoke "Could not request group %s" group) |
Gnus, in turn, will call nnheader-get-report
when it gets a
nil
back from a server, and this function returns the most
recently reported message for the back end in question. This function
takes one argument--the server symbol.
Internally, these functions access back-end-status-string
,
so the nnchoke
back end will have its error message stored in
nnchoke-status-string
.