public override Double VisitMinus(CalculatorParser.MinusContext ctx)
{
return(Visit(ctx.plusOrMinus()) - Visit(ctx.multOrDiv()));
}
/// <summary>
/// Unary Minus operator
/// </summary>
/// <param name="context"></param>
/// <returns></returns>
public override Function VisitMinus(CalculatorParser.MinusContext context)
{
return(new Constant(-1) * Visit(context.expr()));
}
/// <summary>
/// Visit a parse tree produced by the <c>Minus</c>
/// labeled alternative in <see cref="CalculatorParser.plusOrMinus"/>.
/// <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 VisitMinus([NotNull] CalculatorParser.MinusContext context)
{
return(VisitChildren(context));
}
