public override Node VisitFunc([NotNull] FormulaGrammerParser.FuncContext context)
{
var functionNameToken = context.IDENTIFIER().Symbol;
if (this.configuration.IsFunctionsSupportDisabled)
{
ParsingException.ThrowInvalidTokenException(functionNameToken);
}
var functionName = functionNameToken.Text;
var parameters = new List <Node>();
var idxExp = 0;
FormulaGrammerParser.ExpressionContext exp;
while ((exp = context.expression(idxExp++)) != null)
{
parameters.Add(this.Visit(exp));
}
if (!this.configuration.IsFunctionNameValidationDisabled && !this.configuration.HasFunction(functionName, parameters.Count))
{
ParsingException.ThrowUnknownFunctionException(functionNameToken);
}
return(new FunctionNode(functionName, parameters.ToArray()));
}
/// <summary>
/// Visit a parse tree produced by <see cref="FormulaGrammerParser.func"/>.
/// <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 VisitFunc([NotNull] FormulaGrammerParser.FuncContext context)
{
return(VisitChildren(context));
}
/// <summary>
/// Exit a parse tree produced by <see cref="FormulaGrammerParser.func"/>.
/// <para>The default implementation does nothing.</para>
/// </summary>
/// <param name="context">The parse tree.</param>
public virtual void ExitFunc([NotNull] FormulaGrammerParser.FuncContext context)
{
}
