/// <summary>
/// Exit a parse tree produced by <see cref="DDD_layout_scriptParser.range_and_step"/>.
/// <para>The default implementation does nothing.</para>
/// </summary>
/// <param name="context">The parse tree.</param>
public virtual void ExitRange_and_step([NotNull] DDD_layout_scriptParser.Range_and_stepContext context)
{
}
/* Megnézzük, hogy érvényes-e a külön-külön és együtt a range és a step.
*
* Ha nem, akkor nullt adunk vissza, hogy a for ciklus ne futhasson. És hibát írunk ki.
* Különben egy háromelemű tuple-t adunk vissza, kezdet vég és step intekkel.
* Így ha esetleg valamelyik ezek közül float-lenne, annak az alsó egészrészét vesszük és warningot kap a programozó.
*/
public override object VisitRange_and_step([NotNull] DDD_layout_scriptParser.Range_and_stepContext context)
{
var operations = context.operation();
dynamic rangeStart = VisitOperation(operations[0]);
dynamic rangeEnd = VisitOperation(operations[1]);
dynamic step = 1;
if (context.STEP() != null)
{
step = VisitOperation(operations[2]);
}
// ha bármelyik nem int vagy float, akkor ott hiba van
if (!(rangeStart is double || rangeStart is int) || !(rangeEnd is double || rangeEnd is int) || !(step is int || step is double))
{
alerts.Add(new error(context.Start.Line, "Range and step can only hold Int or Float values"));
return(null);
}
if (rangeStart is double)
{
alerts.Add(new warning(context.Start.Line, "The start of the range is casted from Float to Int. You may ignore this warning"));
rangeStart = (int)rangeStart;
}
if (rangeEnd is double)
{
alerts.Add(new warning(context.Start.Line, "The end of the range is casted from Float to Int. You may ignore this warning"));
rangeEnd = (int)rangeEnd;
}
if (step is double)
{
alerts.Add(new warning(context.Start.Line, "The step is casted from Float to Int. You may ignore this warning"));
step = (int)step;
}
if (context.BRACKET_O() != null)
{
rangeStart += (step > 0) ? 1 : -1;
}
if (context.BRACKET_C() != null)
{
rangeEnd -= (step > 0) ? 1 : -1;
}
if (step == 0)
{
alerts.Add(new error(context.Start.Line, "Step was 0. This would cause an infinite loop"));
return(null);
}
if ((step > 0 && rangeEnd - rangeStart < 0) || (step < 0 && rangeEnd - rangeStart > 0))
{
alerts.Add(new error(context.Start.Line, $"Infinite loop. [Range: {rangeStart}..{rangeEnd}, Step: {step}]"));
return(null);
}
return(new Tuple <int, int, int>(rangeStart, rangeEnd, step));
}
/// <summary>
/// Visit a parse tree produced by <see cref="DDD_layout_scriptParser.range_and_step"/>.
/// <para>
/// The default implementation returns the result of calling <see cref="AbstractParseTreeVisitor{Result}.VisitChildren(IRuleNode)"/>
/// on <paramref name="context"/>.
/// </para>
/// </summary>
/// <param name="context">The parse tree.</param>
/// <return>The visitor result.</return>
public virtual Result VisitRange_and_step([NotNull] DDD_layout_scriptParser.Range_and_stepContext context)
{
return(VisitChildren(context));
}
