static private Function ParseFunctionCall()
{
if (CurrentToken.tokenType == TokenType.Symbol)
{
Type functionType;
if (functionMap.TryGetValue(CurrentToken.symbol.ToLowerInvariant(), out functionType))
{
Function function = (Function)functionType.GetConstructor(new Type[0]).Invoke(null);
Function[] inputValues = function.GetDefaultInputValues();
DiscardCurrentToken();
//Parse parameters (if they are available)
if (CurrentToken.tokenType == TokenType.StartFunctionCall)
{
DiscardCurrentToken();
if (CurrentToken.tokenType == TokenType.EndFunctionCall)
{
//End of function call, no parameters
DiscardCurrentToken();
}
else
{
//Parameters!
while (CurrentToken.tokenType == TokenType.Symbol)
{
String parameterName = CurrentToken.symbol;
DiscardCurrentToken();
if (CurrentToken.tokenType == TokenType.Equal)
{
DiscardCurrentToken();
if (CurrentToken.tokenType == TokenType.Number)
{
//Parameter value is a number
int parameterNumber = CurrentToken.number;
DiscardCurrentToken();
int index = function.GetInputParameterIndex(parameterName);
if (index >= 0)
{
//It's an input parameter!
if (function.InputParameters[index].Type == ParameterType.Number)
{
inputValues[index] = new ConstantNumber(parameterNumber);
}
else
{
//Error!
return(null);
}
}
else
{
//Try to lookup a public propery with the same name
PropertyInfo property = function.GetType().GetProperty(parameterName, BindingFlags.IgnoreCase | BindingFlags.Instance | BindingFlags.Public);
if (property != null)
{
if (property.PropertyType == typeof(int))
{
property.SetValue(function, (int)parameterNumber, null);
}
else if (property.PropertyType == typeof(float))
{
property.SetValue(function, (int)parameterNumber, null);
}
}
}
}
else if (CurrentToken.tokenType == TokenType.Symbol)
{
//Parameter value is anothe function call!
Function parameterFunction = ParseFunctionCall();
if (parameterFunction != null)
{
int index = function.GetInputParameterIndex(parameterName);
if (index >= 0)
{
//It's an input parameter!
if (function.InputParameters[index].Type == parameterFunction.OutputParameter.Type)
{
inputValues[index] = parameterFunction;
}
else
{
//Error!
return(null);
}
}
}
}
else
{
//Error
return(null);
}
if (CurrentToken.tokenType == TokenType.Comma)
{
DiscardCurrentToken(); //More parameters to come!
}
else if (CurrentToken.tokenType == TokenType.EndFunctionCall)
{
DiscardCurrentToken();
//End of function call
break;
}
}
else
{
//Error
return(null);
}
}
}
}
function.SetInputValues(inputValues);
return(function);
}
}
return(null);
}
private static Function ParseFunctionCall()
{
if (CurrentToken.tokenType == TokenType.Symbol)
{
Type functionType;
if (functionMap.TryGetValue(CurrentToken.symbol.ToLowerInvariant(), out functionType))
{
Function function = (Function)functionType.GetConstructor(new Type[0]).Invoke(null);
Function[] inputValues = function.GetDefaultInputValues();
DiscardCurrentToken();
//Parse parameters (if they are available)
if (CurrentToken.tokenType == TokenType.StartFunctionCall)
{
DiscardCurrentToken();
if (CurrentToken.tokenType == TokenType.EndFunctionCall)
{
//End of function call, no parameters
DiscardCurrentToken();
}
else
{
//Parameters!
while (CurrentToken.tokenType == TokenType.Symbol)
{
String parameterName = CurrentToken.symbol;
DiscardCurrentToken();
if (CurrentToken.tokenType == TokenType.Equal)
{
DiscardCurrentToken();
if (CurrentToken.tokenType == TokenType.Number)
{
//Parameter value is a number
int parameterNumber = CurrentToken.number;
DiscardCurrentToken();
int index = function.GetInputParameterIndex(parameterName);
if (index >= 0)
{
//It's an input parameter!
if (function.InputParameters[index].Type == ParameterType.Number)
{
inputValues[index] = new ConstantNumber(parameterNumber);
}
else
{
//Error!
return null;
}
}
else
{
//Try to lookup a public propery with the same name
PropertyInfo property = function.GetType().GetProperty(parameterName, BindingFlags.IgnoreCase | BindingFlags.Instance | BindingFlags.Public);
if (property != null)
{
if (property.PropertyType == typeof(int))
{
property.SetValue(function, (int)parameterNumber, null);
}
else if (property.PropertyType == typeof(float))
{
property.SetValue(function, (int)parameterNumber, null);
}
}
}
}
else if (CurrentToken.tokenType == TokenType.Symbol)
{
//Parameter value is anothe function call!
Function parameterFunction = ParseFunctionCall();
if (parameterFunction != null)
{
int index = function.GetInputParameterIndex(parameterName);
if (index >= 0)
{
//It's an input parameter!
if (function.InputParameters[index].Type == parameterFunction.OutputParameter.Type)
{
inputValues[index] = parameterFunction;
}
else
{
//Error!
return null;
}
}
}
}
else
{
//Error
return null;
}
if (CurrentToken.tokenType == TokenType.Comma)
{
DiscardCurrentToken(); //More parameters to come!
}
else if (CurrentToken.tokenType == TokenType.EndFunctionCall)
{
DiscardCurrentToken();
//End of function call
break;
}
}
else
{
//Error
return null;
}
}
}
}
function.SetInputValues(inputValues);
return function;
}
}
return null;
}
