public bool CheckSemantics(QLContext context, List <Message> messages)
{
// check the two child nodes have semantic errors
var lhsSemanticsOk = Lhs.CheckSemantics(context, messages);
var rhsSemanticsOk = Rhs.CheckSemantics(context, messages);
// Don't continue with semantics checking if one of the child nodes has an error
if (!lhsSemanticsOk || !rhsSemanticsOk)
{
return(false);
}
try
{
// Call the child class to get the return type of this epxression if the operation is not supported this will throw
var resultType = GetResultType(context);
return(true);
}
catch (NotSupportedException)
{
messages.Add(new Error(string.Format("Cannot apply operator {0} on arguments of type {1} and {2}", this, Lhs.GetResultType(context), Rhs.GetResultType(context))));
return(false);
}
catch (DivideByZeroException)
{
return(true);
}
}