public override IAnalysisSet Call(Node node, AnalysisUnit unit, IAnalysisSet[] args, NameExpression[] keywordArgNames)
{
var callArgs = ArgumentSet.FromArgs(FunctionDefinition, unit, args, keywordArgNames);
FunctionAnalysisUnit calledUnit;
bool updateArguments = true;
if (callArgs.Count == 0 ||
(ProjectState.Limits.UnifyCallsToNew && Name == "__new__") ||
_callDepthLimit == 0)
{
calledUnit = (FunctionAnalysisUnit)AnalysisUnit;
}
else
{
if (_allCalls == null)
{
_allCalls = new CallChainSet <FunctionAnalysisUnit>();
}
var chain = new CallChain(node, unit, _callDepthLimit);
if (!_allCalls.TryGetValue(unit.ProjectEntry, chain, _callDepthLimit, out calledUnit))
{
if (unit.ForEval)
{
// Call expressions that weren't analyzed get the union result
// of all calls to this function.
var res = AnalysisSet.Empty;
foreach (var call in _allCalls.Values)
{
res = res.Union(call.ReturnValue.TypesNoCopy);
}
return(res);
}
else
{
_callsSinceLimitChange += 1;
if (_callsSinceLimitChange >= ProjectState.Limits.DecreaseCallDepth && _callDepthLimit > 1)
{
_callDepthLimit -= 1;
_callsSinceLimitChange = 0;
AnalysisLog.ReduceCallDepth(this, _allCalls.Count, _callDepthLimit);
_allCalls.Clear();
chain = chain.Trim(_callDepthLimit);
}
calledUnit = new FunctionAnalysisUnit((FunctionAnalysisUnit)AnalysisUnit, chain, callArgs);
_allCalls.Add(unit.ProjectEntry, chain, calledUnit);
updateArguments = false;
}
}
}
if (updateArguments && calledUnit.UpdateParameters(callArgs))
{
AnalysisLog.UpdateUnit(calledUnit);
}
if (keywordArgNames != null && keywordArgNames.Any())
{
calledUnit.AddNamedParameterReferences(unit, keywordArgNames);
}
calledUnit.ReturnValue.AddDependency(unit);
return(calledUnit.ReturnValue.Types);
}