/// <summary>
/// Invoke the specified method
/// </summary>
/// <param name="callerInterpreter">The caller interpreter (usually a block)</param>
/// <param name="invokeExpression">The invoke expression</param>
/// <param name="argumentValues">The list of argument values</param>
/// <param name="parentMethodInterpreter">The parent method interpret from where the invocation happened</param>
/// <param name="callStackService">The user call stack service</param>
/// <returns>Returns the result of the method</returns>
internal object InvokeMethod(Interpret callerInterpreter, AlgorithmExpression invokeExpression, Collection <object> argumentValues, MethodInterpreter parentMethodInterpreter, CallStackService callStackService)
{
var methodName = invokeExpression._methodName.ToString();
var method = Methods.FirstOrDefault(m => m.MethodDeclaration._name.ToString() == methodName);
if (method == null)
{
callerInterpreter.ChangeState(this, new AlgorithmInterpreterStateEventArgs(new Error(new MethodNotFoundException(methodName, $"The method '{methodName}' does not exists in the current class or is not accessible."), ClassDeclaration), callerInterpreter.GetDebugInfo()));
return(null);
}
if (!method.MethodDeclaration._isAsync && invokeExpression._await)
{
callerInterpreter.ChangeState(this, new AlgorithmInterpreterStateEventArgs(new Error(new MethodNotAwaitableException(methodName), method.MethodDeclaration), callerInterpreter.GetDebugInfo()));
return(null);
}
Guid stackTraceId;
var isAsync = method.MethodDeclaration._isAsync;
if (parentMethodInterpreter == null)
{
stackTraceId = Guid.Empty;
}
else
{
stackTraceId = parentMethodInterpreter.StacktraceId;
if (DebugMode)
{
var callStack = callStackService.CallStacks.Single(cs => cs.TaceId == stackTraceId);
var call = callStack.Stack.Pop();
if (call != null)
{
call.Variables = callerInterpreter.GetAllAccessibleVariable().DeepClone();
callStack.Stack.Push(call);
}
}
}
method = new MethodInterpreter(method.MethodDeclaration, DebugMode);
method.StateChanged += ChangeState;
method.OnGetParentInterpreter += new Func <ClassInterpreter>(() => this);
method.OnDone += new Action <MethodInterpreter>((met) =>
{
met.Dispose();
met.StateChanged -= ChangeState;
});
method.Initialize();
method.Run(invokeExpression._await, argumentValues, stackTraceId);
if (isAsync && !invokeExpression._await)
{
return(null);
}
return(method.ReturnedValue);
}