//When a variable's value is changed.
public override object VisitStat_setvar([NotNull] algoParser.Stat_setvarContext context)
{
//Get the variable/object reference.
AlgoValue varToSet = Particles.ParseParticleBlock(this, context, context.IDENTIFIER(), context.particle());
if (varToSet == null)
{
Error.Fatal(context, "No value returned to set.");
return(null);
}
//Does, evaluate the expression to set the value.
AlgoValue value = (AlgoValue)VisitExpr(context.expr());
//Check if there's a rounding expression.
if (context.rounding_expr() != null)
{
//Evaluate rounding number expression.
AlgoValue roundingNum = (AlgoValue)VisitExpr(context.rounding_expr().expr());
if (roundingNum.Type != AlgoValueType.Integer)
{
Error.Warning(context, "Rounding expression did not return an integer to round by, so rounding was ignored.");
}
else if ((BigInteger)roundingNum.Value > int.MaxValue)
{
Error.Warning(context, "Rounding number too large, so rounding was ignored.");
}
else
{
//Getting rounding integer.
int roundingInt = int.Parse(((BigInteger)roundingNum.Value).ToString());
//Rounding the value, setting.
Scopes.SetVariable(context.IDENTIFIER().GetText(), AlgoOperators.Round(context, value, roundingInt));
return(null);
}
}
//Set variable.
varToSet.Value = value.Value;
varToSet.Type = value.Type;
return(null);
}
/// <summary>
/// Visit a parse tree produced by <see cref="algoParser.stat_setvar"/>.
/// <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 VisitStat_setvar([NotNull] algoParser.Stat_setvarContext context)
{
return(VisitChildren(context));
}
/// <summary>
/// Exit a parse tree produced by <see cref="algoParser.stat_setvar"/>.
/// <para>The default implementation does nothing.</para>
/// </summary>
/// <param name="context">The parse tree.</param>
public virtual void ExitStat_setvar([NotNull] algoParser.Stat_setvarContext context)
{
}
