//When an error is manually thrown by a user.
public override object VisitStat_throw([NotNull] algoParser.Stat_throwContext context)
{
//Evaluate the expression.
AlgoValue throwStr = (AlgoValue)VisitExpr(context.expr());
//Is it a string?
if (throwStr.Type != AlgoValueType.String)
{
Error.Fatal(context, "Error message to throw must be a string.");
return(null);
}
//Throw the error.
Error.Fatal(context, (string)throwStr.Value);
return(null);
}
/// <summary>
/// Visit a parse tree produced by <see cref="algoParser.stat_throw"/>.
/// <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_throw([NotNull] algoParser.Stat_throwContext context)
{
return(VisitChildren(context));
}
/// <summary>
/// Exit a parse tree produced by <see cref="algoParser.stat_throw"/>.
/// <para>The default implementation does nothing.</para>
/// </summary>
/// <param name="context">The parse tree.</param>
public virtual void ExitStat_throw([NotNull] algoParser.Stat_throwContext context)
{
}