Type_E _Get_Enum_Type(string sType)//convert string to enum
{
    transform(sType.begin(), sType.end(), sType.begin(), tolower);
    if(sType == "input")         {return INPUT;}       
    else if(sType == "not")      {return NOT;}        
    else if(sType == "and")     {return AND;}
    else if(sType == "nand")   {return NAND;}
    else if(sType == "or")       {return OR;}
    else if(sType == "nor")     {return NOR;}
    else if(sType == "xor")     {return XOR;}
    else if(sType == "xnor")   {return XNOR;}
    else if(sType == "1'b0")   {return LOW;}
    else if(sType == "1'b1")   {return HIGH;}
    else                                  {return NONE;}
}

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