public override FilterDefinition <T> VisitFuncOp([NotNull] FilterParser.FuncOpContext context)
{
string id = context.ID().GetText();
string str = context.STRING().GetText().Trim('\'');;
var func = context.func.Type;
switch (func)
{
case FilterParser.STARTSWITH:
return(_builder.Regex(id, new BsonRegularExpression($"^{str}", "i")));
case FilterParser.ENDSWITH:
return(_builder.Regex(id, new BsonRegularExpression($"{str}$", "i")));
case FilterParser.SUBSTRINGOF:
return(_builder.Regex(id, new BsonRegularExpression($"{str}", "i")));
default:
throw new InvalidOperationException($"Invalid StringOp {context.GetText()}");
}
}
/// <summary>
/// Visit a parse tree produced by the <c>FuncOp</c>
/// labeled alternative in <see cref="FilterParser.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 VisitFuncOp([NotNull] FilterParser.FuncOpContext context)
{
return(VisitChildren(context));
}