public override void EnterExpressionMinus([NotNull] FormulaParser.ExpressionMinusContext context)
{
opStacks.Peek().Push("-");
}
/// <summary>
/// Exit a parse tree produced by the <c>ExpressionMinus</c>
/// labeled alternative in <see cref="FormulaParser.expression"/>.
/// <para>The default implementation does nothing.</para>
/// </summary>
/// <param name="context">The parse tree.</param>
public virtual void ExitExpressionMinus([NotNull] FormulaParser.ExpressionMinusContext context)
{
}