public override object VisitBlock([NotNull] CalculatorParser.BlockContext context)
{
var stack = new Stack(m_stack);
// Save the old stack's reference
var oldStack = m_stack;
m_stack = stack;
var result = base.VisitBlock(context);
// Retrieve the old stack
m_stack = oldStack;
return(result);
}
/// <summary>
/// Visit a parse tree produced by <see cref="CalculatorParser.block"/>.
/// <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 VisitBlock([NotNull] CalculatorParser.BlockContext context)
{
return(VisitChildren(context));
}