// addExpr op=('+'|'-') multExpr
public override object VisitAddExpr([NotNull] WSParser.AddExprContext context)
{
var left = Int32.Parse(Visit(context.expr()[0]).ToString());
var right = Int32.Parse(Visit(context.expr()[1]).ToString());
switch (context.op.Text)
{
case "+":
return(left + right);
case "-":
return(left - right);
default:
Console.WriteLine("Unkown op " + context.op.Text);
break;
}
return(base.VisitAddExpr(context));
}
/// <summary>
/// Exit a parse tree produced by the <c>AddExpr</c>
/// labeled alternative in <see cref="WSParser.expr"/>.
/// <para>The default implementation does nothing.</para>
/// </summary>
/// <param name="context">The parse tree.</param>
public virtual void ExitAddExpr([NotNull] WSParser.AddExprContext context)
{
}
/// <summary>
/// Visit a parse tree produced by the <c>AddExpr</c>
/// labeled alternative in <see cref="WSParser.expr"/>.
/// <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 VisitAddExpr([NotNull] WSParser.AddExprContext context)
{
return(VisitChildren(context));
}