//When a variable is deleted.
public override object VisitStat_deletevar([NotNull] algoParser.Stat_deletevarContext context)
{
//Checking if the disregard wants to delete all variables or only one.
if (context.IDENTIFIER() != null)
{
//Get variable name.
string varname = Particles.StitchVariableName(context, context.IDENTIFIER().GetText(), context.particle());
//Check if variable exists.
if (!Scopes.VariableExists(varname))
{
//Maybe it's a library?
if (Scopes.LibraryExists(varname))
{
//Okay, just disregard the library.
Scopes.RemoveLibrary(varname);
return(null);
}
//Not a library, so doesn't exist.
Error.Fatal(context, "Invalid variable name given to disregard.");
return(null);
}
//Remove variable.
Scopes.RemoveVariable(varname);
}
else
{
//Reset all scopes.
Scopes.Reset();
}
return(null);
}
/// <summary>
/// Visit a parse tree produced by <see cref="algoParser.stat_deletevar"/>.
/// <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_deletevar([NotNull] algoParser.Stat_deletevarContext context)
{
return(VisitChildren(context));
}
/// <summary>
/// Exit a parse tree produced by <see cref="algoParser.stat_deletevar"/>.
/// <para>The default implementation does nothing.</para>
/// </summary>
/// <param name="context">The parse tree.</param>
public virtual void ExitStat_deletevar([NotNull] algoParser.Stat_deletevarContext context)
{
}
