private Node HandlePositiveFactor()
{
double numberValue;
if (_tokenizer.MatchDouble(out numberValue))
{
return(new ConstantNode(numberValue));
}
string identifier;
if (_tokenizer.MatchIdentifier(out identifier))
{
return(new VariableNode(identifier));
}
if (_tokenizer.Match(TokenType.OpenPar))
{
var e = HandleSuperExpression();
if (!_tokenizer.Match(TokenType.ClosePar))
{
return(new ErrorNode("Expected )."));
}
return(e);
}
return(new ErrorNode("Expected number or (expression)."));
}
FunctionNode IsFunction()
{
if (!_tokenizer.MatchIdentifier("function"))
{
return(null);
}
string name;
string returnType;
List <string> parameters = new List <string>();
// Si ensuite on a les autres infos et une ouverture de parenthèse
if (_tokenizer.IsIdentifier(out returnType) &&
_tokenizer.IsIdentifier(out name) &&
_tokenizer.Match(TokenType.OpenPar))
{
// On prend tout les params
while (!_tokenizer.Match(TokenType.ClosedPar))
{
string parameterType;
string osef;
if (_tokenizer.IsIdentifier(out parameterType) && _tokenizer.IsIdentifier(out osef))
{
parameters.Add(parameterType);
}
else
{
AddError("PB !");
return(null);
}
_tokenizer.Match(TokenType.Comma);
}
if (_tokenizer.Match(TokenType.OpenCurly))
{
FunctionNode fct = new FunctionNode(name, returnType, ParseFunctionBody(), parameters);
return(fct);
}
else
{
AddError("Cannot begin function... :(");
}
}
else
{
AddError("Error on Function creation...");
}
return(null);
}