public override Result VisitExpr_additive([NotNull] ExpressionParser.Expr_additiveContext context) { var(lSuc, lValue) = Visit(context.lhs); var(rSuc, rValue) = Visit(context.rhs); if (!(lSuc && rSuc)) { return(DefaultResult); } switch (context.op.Type) { case ExpressionParser.PLUS: return(new Result(true, lValue + rValue)); case ExpressionParser.MINUS: return(new Result(true, lValue - rValue)); default: return(DefaultResult); } }
/// <summary> /// Visit a parse tree produced by the <c>expr_additive</c> /// labeled alternative in <see cref="ExpressionParser.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 VisitExpr_additive([NotNull] ExpressionParser.Expr_additiveContext context) { return(VisitChildren(context)); }
/// <summary> /// Exit a parse tree produced by the <c>expr_additive</c> /// labeled alternative in <see cref="ExpressionParser.expr"/>. /// <para>The default implementation does nothing.</para> /// </summary> /// <param name="context">The parse tree.</param> public virtual void ExitExpr_additive([NotNull] ExpressionParser.Expr_additiveContext context) { }