/// <summary>
/// Evaluates a function declaration expression
/// </summary>
/// <returns></returns>
private FunctionExpression EvaluateFunction()
{
FunctionExpression retVal = null;
int current = Index;
if (LookAhead("FUNCTION"))
{
List <Parameter> parameters = new List <Parameter>();
bool cont = true;
Match("FUNCTION");
while (cont)
{
string id = Identifier();
if (id != null)
{
skipWhiteSpaces();
Match(":");
skipWhiteSpaces();
string typeName = Identifier(true);
if (typeName != null)
{
Parameter parameter = (Parameter)Generated.acceptor.getFactory().createParameter();
parameter.Name = id;
parameter.TypeName = typeName;
parameters.Add(parameter);
}
else
{
throw new ParseErrorException("Parameter type expected");
}
}
else
{
throw new ParseErrorException("Parameter identifier expected");
}
cont = LookAhead(",");
if (cont)
{
Match(",");
}
}
skipWhiteSpaces();
Match("=>");
Expression expression = Expression(0);
if (expression != null)
{
retVal = new FunctionExpression(Root, parameters, expression);
}
else
{
throw new ParseErrorException("Function expression expected");
}
}
return(retVal);
}
/// <summary>
/// Visits a Function expression
/// </summary>
/// <param name="functionExpression"></param>
protected virtual void VisitFunctionExpression(FunctionExpression functionExpression)
{
if (functionExpression.Expression != null)
{
VisitExpression(functionExpression.Expression);
}
}
/// <summary>
/// Evaluates a function declaration expression
/// </summary>
/// <returns></returns>
private FunctionExpression EvaluateFunction()
{
FunctionExpression retVal = null;
SkipWhiteSpaces();
int start = Index;
if (LookAhead("FUNCTION"))
{
List<Parameter> parameters = new List<Parameter>();
bool cont = true;
Match("FUNCTION");
while (cont)
{
string id = Identifier();
if (id != null)
{
SkipWhiteSpaces();
Match(":");
SkipWhiteSpaces();
string typeName = Identifier(true);
if (typeName != null)
{
Parameter parameter = (Parameter) acceptor.getFactory().createParameter();
parameter.Name = id;
parameter.TypeName = typeName;
parameters.Add(parameter);
}
else
{
throw new ParseErrorException("Parameter type expected", Index, Buffer);
}
}
else
{
throw new ParseErrorException("Parameter identifier expected", Index, Buffer);
}
cont = LookAhead(",");
if (cont)
{
Match(",");
}
}
SkipWhiteSpaces();
string assignOp = LookAhead(AssignOps);
if (assignOp != null)
{
Match(assignOp);
Expression expression = Expression(0);
if (expression != null)
{
retVal = new FunctionExpression(Root, RootLog, parameters, expression, start, Index);
}
else
{
throw new ParseErrorException("Function expression expected", Index, Buffer);
}
}
else
{
throw new ParseErrorException("=> or <- expected", Index, Buffer);
}
}
return retVal;
}
/// <summary>
/// Evaluates a function declaration expression
/// </summary>
/// <returns></returns>
private FunctionExpression EvaluateFunction()
{
FunctionExpression retVal = null;
int current = Index;
if (LookAhead("FUNCTION"))
{
List<Parameter> parameters = new List<Parameter>();
bool cont = true;
Match("FUNCTION");
while (cont)
{
string id = Identifier();
if (id != null)
{
skipWhiteSpaces();
Match(":");
skipWhiteSpaces();
string typeName = Identifier(true);
if (typeName != null)
{
Parameter parameter = (Parameter)Generated.acceptor.getFactory().createParameter();
parameter.Name = id;
parameter.TypeName = typeName;
parameters.Add(parameter);
}
else
{
throw new ParseErrorException("Parameter type expected");
}
}
else
{
throw new ParseErrorException("Parameter identifier expected");
}
cont = LookAhead(",");
if (cont)
{
Match(",");
}
}
skipWhiteSpaces();
Match("=>");
Expression expression = Expression(0);
if (expression != null)
{
retVal = new FunctionExpression(Root, parameters, expression);
}
else
{
throw new ParseErrorException("Function expression expected");
}
}
return retVal;
}
/// <summary>
/// Visits a Function expression
/// </summary>
/// <param name="functionExpression"></param>
protected virtual void VisitFunctionExpression(FunctionExpression functionExpression)
{
if (functionExpression.Expression != null)
{
VisitInterpreterTreeNode(functionExpression.Expression);
}
}
/// <summary>
/// Provides the speed parameter of the function
/// </summary>
/// <param name="functionExpression"></param>
/// <returns></returns>
public Parameter GetSpeedParameter(FunctionExpression functionExpression)
{
Parameter retVal = null;
Parameter distance = GetDistanceParameter(functionExpression);
foreach (Parameter p in functionExpression.Parameters)
{
if (IsDouble(p) && p != distance)
{
retVal = p;
break;
}
}
return retVal;
}
/// <summary>
/// Provides the distance parameter of the function expression
/// </summary>
/// <param name="functionExpression"></param>
/// <returns></returns>
public Parameter GetDistanceParameter(FunctionExpression functionExpression)
{
Parameter retVal = null;
foreach (Parameter p in functionExpression.Parameters)
{
if (IsDouble(p))
{
retVal = p;
break;
}
}
return retVal;
}
