public static MethodInfo GetCalcMethod(TokenKind opKind, Type ltype, Type rtype)
{
CalculaterMethodTypeEnum calculaterMethodType = GetCalculaterMethodType(opKind, ltype, rtype);
if (calculaterMethodType == CalculaterMethodTypeEnum.None)
{
return(null);
}
return(GetCalcMethod(calculaterMethodType, opKind, ltype, rtype));
}
private static MethodInfo GetCalcMethod(CalculaterMethodTypeEnum calculaterMethodType, TokenKind opKind, Type ltype, Type rtype)
{
Type calcType = typeof(Calculater);
if (calculaterMethodType == CalculaterMethodTypeEnum.ContactString)
{
return(calcType.GetMethod("AddString"));
}
string opName = GetOpName(opKind);
if (opName == null)
{
return(null);
}
string typeName = GetTypeName(ltype, rtype);
if (typeName == null)
{
return(null);
}
string methodName = opName + typeName;
if (calculaterMethodType == CalculaterMethodTypeEnum.MathOp)
{
return(calcType.GetMethod(methodName));
}
if (calculaterMethodType == CalculaterMethodTypeEnum.MathDiv)
{
return(calcType.GetMethod(methodName));
}
if (calculaterMethodType == CalculaterMethodTypeEnum.MathCompare)
{
return(calcType.GetMethod(methodName));
}
if (calculaterMethodType == CalculaterMethodTypeEnum.RefCompare)
{
return(calcType.GetMethod(methodName));
}
if (calculaterMethodType == CalculaterMethodTypeEnum.Logic)
{
return(calcType.GetMethod(methodName));
}
return(null);
}
public static Type GetRetType(CalculaterMethodTypeEnum calculaterMethodType, Type ltype, Type rtype)
{
if (calculaterMethodType == CalculaterMethodTypeEnum.None)
{
return(null);
}
if (calculaterMethodType == CalculaterMethodTypeEnum.ContactString)
{
return(typeof(string));
}
if (calculaterMethodType == CalculaterMethodTypeEnum.MathOp)
{
if (ltype == typeof(int) || rtype == typeof(int))
{
return(typeof(int));
}
else
{
return(typeof(float));
}
}
if (calculaterMethodType == CalculaterMethodTypeEnum.MathDiv)
{
return(typeof(float));
}
if (calculaterMethodType == CalculaterMethodTypeEnum.MathCompare)
{
return(typeof(bool));
}
if (calculaterMethodType == CalculaterMethodTypeEnum.RefCompare)
{
return(typeof(bool));
}
if (calculaterMethodType == CalculaterMethodTypeEnum.Logic)
{
return(typeof(bool));
}
return(null);
}