public override Result VisitExpr_funccall([NotNull] ExpressionParser.Expr_funccallContext context) { if (context.funcname.Text.Equals("SIN", StringComparison.OrdinalIgnoreCase)) { if (context._args.Count != 1) { return(DefaultResult); } var(suc, val) = Visit(context._args[0]); if (!suc) { return(DefaultResult); } //このサンプルでは浮動小数点型を導入していないので、引数はラジアンではなく角度とし、自動で変換する return(new Result(true, (int)Math.Sin(DegToRad(val)))); } switch (context.Start.Type) { case ExpressionParser.UINT: return(new Result(true, int.Parse(context.Start.Text))); default: return(DefaultResult); } }
/// <summary> /// Visit a parse tree produced by the <c>expr_funccall</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_funccall([NotNull] ExpressionParser.Expr_funccallContext context) { return(VisitChildren(context)); }
/// <summary> /// Exit a parse tree produced by the <c>expr_funccall</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_funccall([NotNull] ExpressionParser.Expr_funccallContext context) { }