public override Lazy <object> VisitNotExpression(QuestScriptParser.NotExpressionContext context)
{
var type = _scriptEnvironmentBuilder.TypeInferenceVisitor.Visit(context.expr);
if (type != ObjectType.Boolean)
{
_scriptEnvironmentBuilder.Errors.Add(new UnexpectedTypeException(context, ObjectType.Boolean, type,
context.expr, "In general, 'not' operators are applicable only on boolean expressions."));
return(new Lazy <object>(() => null));
}
return(new Lazy <object>(() =>
{
var val = context.expr.Accept(this).Value.GetValueOrLazyValue();
return Cast(!(dynamic)val, ObjectType.Boolean);
}));
}
public override ObjectType VisitNotExpression(QuestScriptParser.NotExpressionContext context)
{
return(context.expr.Accept(this) != ObjectType.Boolean ? ObjectType.Unknown : ObjectType.Boolean);
}
public override bool VisitNotExpression(QuestScriptParser.NotExpressionContext context)
{
_output.AppendFormat("not ");
context.expr.Accept(this);
return(true);
}
