public override Node GetBody(Node[] argumentValues)
{
return(TernaryOperatorNode.Conditional(TernaryOperatorNode.GreaterThan(argumentValues[0], argumentValues[1]), argumentValues[0], argumentValues[1]));
}
public TernaryOperatorNode Build()
{
TernaryOperatorNode ternaryNode = new TernaryOperatorNode();
while (_reader.HasNext())
{
var node = new AstNodeBuilder(_reader, _block, _interceptChars).Build();
if (node == null)
{
throwError("ternary empty expression is not allowed!");
}
/*
* expression end
*
*/
if (_reader.Current().Value == ";")
{
if (ternaryNode.Operands.Count == 2)//more two
{
throwError("ternary expression incorrect!");
}
else if (ternaryNode.Operands.Count == 0)// only one
{
throwError("ternary expression incorrect!");
}
else
{
ternaryNode.Operands.Add(node);
return(ternaryNode);
}
}
/*
* start a new ternary builder
*
*/
else if (_reader.Current().Value == "?")
{
if (!node.OutputType.IsBool())
{
throwError("before '?' require a expression which output is bool! ");
}
var ternaryNode2 = new TerbaryBuilder(_reader, _block).Build();
ternaryNode2.Operands.Insert(0, node);
ternaryNode.Operands.Add(ternaryNode2);
if (_reader.Current().Value == ";")
{
if (ternaryNode.Operands.Count != 2)
{
throwError("incompleted ternary exception!");
}
return(ternaryNode);
}
}
else if (_reader.Current().Value == ":")
{
if (ternaryNode.Operands.Count == 1)
{
ternaryNode.Operands.Add(node);
return(ternaryNode);
}
else
{
ternaryNode.Operands.Add(node);
}
}
}
throwError("incompleted ternary expression!");
return(ternaryNode);
}