public override object VisitInvocationExpression(InvocationExpression invocationExpression, object data)
{
var previousInvocaton = InvokedSystemTypes.FirstOrDefault(a => a.OriginalExpression.Target.ToString() == invocationExpression.Target.ToString());
if (previousInvocaton != null)
{
previousInvocaton.Variations.Add(invocationExpression);
return(base.VisitInvocationExpression(invocationExpression, data));
}
var targetMember = invocationExpression.Target as MemberReferenceExpression;
if (targetMember == null)
{
return(base.VisitInvocationExpression(invocationExpression, data));
}
var targetMemberName = targetMember.Target.ToString();
//Special cases
if (targetMember.Target is TypeReferenceExpression)
{
Type t;
switch (targetMemberName)
{
case "string":
t = typeof(string);
break;
case "int":
t = typeof(int);
break;
case "long":
t = typeof(long);
break;
case "double":
t = typeof(double);
break;
default:
t = null;
break;
}
if (t != null)
{
InvokedSystemTypes.Add(new SystemTypeInvocaton()
{
MethodName = targetMember.MemberName,
OriginalExpression = invocationExpression,
SystemType = typeof(string)
});
return(base.VisitInvocationExpression(invocationExpression, data));
}
}
Type systemType;
//1st strategy - just try directly. This will work if the type is fully named (like System.Console or System.Threading.Thread)
if (TryGetType(targetMemberName, out systemType))
{
InvokedSystemTypes.Add(new SystemTypeInvocaton()
{
MethodName = targetMember.MemberName,
OriginalExpression = invocationExpression,
SystemType = systemType
});
return(base.VisitInvocationExpression(invocationExpression, data));
}
//2nd strategy. Append all usings to the invoked thing.
foreach (var ns in invocationExpression.GetUsings())
{
if (TryGetType(ns + "." + targetMemberName, out systemType))
{
InvokedSystemTypes.Add(new SystemTypeInvocaton()
{
MethodName = targetMember.MemberName,
OriginalExpression = invocationExpression,
SystemType = systemType
});
return(base.VisitInvocationExpression(invocationExpression, data));
}
}
//3rd strategy. The expensive one: attempt to find an identifiers type from the scope.
var current = targetMember.Target.Parent;
while (current != null)
{
var variableDeclarations = current.Descendants.OfType <VariableDeclarationStatement>();
if (variableDeclarations.Any())
{
foreach (var variableDeclaration in variableDeclarations)
{
foreach (var variable in variableDeclaration.Variables)
{
var objectCreation = variable.Initializer as ObjectCreateExpression;
if (objectCreation != null)
{
foreach (var ns in invocationExpression.GetUsings())
{
var typeName = objectCreation.Type.ToString();
if (TryGetType(ns + "." + typeName, out systemType))
{
InvokedSystemTypes.Add(new SystemTypeInvocaton()
{
MethodName = targetMember.MemberName,
OriginalExpression = invocationExpression,
SystemType = systemType
});
return(base.VisitInvocationExpression(invocationExpression, data));
}
}
}
}
}
}
current = current.Parent;
}
return(base.VisitInvocationExpression(invocationExpression, data));
}
