//独自関数の計算
public override Result VisitExpr_funccall([NotNull] calcParser.Expr_funccallContext context)
{
var(argSuc, argType, argValue) = Visit(context._args[0]);
if (!argSuc)
{
return(DefaultResult);
}
if (context.funcname.Text.ToUpper() == "SIN")
{
return(new Result(true, CalcRule.CalcReal, (float)Math.Sin(GetValFloat(argType, argValue) * (Math.PI / 180))));
}
if (context.funcname.Text.ToUpper() == "LEN")
{
string str = (string)argValue;
return(new Result(true, CalcRule.CalcInt, str.Length));
}
else
{
Debug.Assert(false);
return(DefaultResult);
}
}
/// <summary>
/// Visit a parse tree produced by the <c>expr_funccall</c>
/// labeled alternative in <see cref="calcParser.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] calcParser.Expr_funccallContext context)
{
return(VisitChildren(context));
}
