I've been trying to use exception handling in a particularly appropriate place
in JSBSim,
but am having little success, and it's got me confused.
I have a section where I am reading in some data. If it is inappropriate, I
need to let
the user know and exit.
Here's what I'm doing:
In the Table class:
In FGTable constructor:
if (operation_types.find(parent_type) == string::npos) {
internal = true;
} else {
throw(string("An internal table cannot be ..."));
}
Now, this seems to work OK - I throw an exception if a situation occurs that is
invalid.
Here's where the above code is originally called from:
In FGFunction constructor:
try {
Parameters.push_back(new FGTable(PropertyManager, element));
} catch (...) {throw;}
This is supposed to pass the exception on up the chain to here the code that
calls the
above:
In FGAerodynamics::Load():
try {
variables.push_back( new FGFunction(PropertyManager, function_element) );
} catch(string msg) {
return false;
}
Execution seems to get to the "throw" in FGFunction and dies. Execution never
gets to the
handler in FGAerodynamics. I get a segfault.
I'm probably missing something fundamental here. Anyone have any suggestions?
Jon
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