/// <summary>
/// Create a parser for the set of tags and shortcodes that have been defined.
/// </summary>
/// <param name="throwOnUnknownTag">If true, undefined tags return null rather than throwing an exception.</param>
/// <returns></returns>
/// <remarks>The option to ignore unknown tags can be used to ignore output tags that are not defined until the render process.</remarks>
private Parser <Statement> CreateKnownTagsParser(bool throwOnUnknownTag)
{
var parser = OneOf(
LavaTagParsers.LavaTagStart()
.SkipAnd(Identifier.ElseError(ErrorMessages.IdentifierAfterTagStart)
.Switch((context, tagName) =>
{
if (RegisteredTags.TryGetValue(tagName, out var tag))
{
return(tag);
}
else if (throwOnUnknownTag)
{
throw new global::Fluid.ParseException($"Unknown tag '{tagName}' at {context.Scanner.Cursor.Position}");
}
return(null);
})
),
LavaTagParsers.LavaShortcodeStart()
.SkipAnd(Identifier.ElseError(ErrorMessages.IdentifierAfterTagStart)
.Switch((context, tagName) =>
{
var shortcodeTagName = tagName + "_";
if (RegisteredTags.TryGetValue(shortcodeTagName, out var shortcode))
{
return(shortcode);
}
throw new global::Fluid.ParseException($"Unknown shortcode '{tagName}' at {context.Scanner.Cursor.Position}");
})
)
);
return(parser);
}
IEnumerable <RegisterDirective> GetDirectivesForPrefix(string prefix)
{
return(RegisteredTags.Where(t => string.Equals(t.TagPrefix, prefix, StringComparison.OrdinalIgnoreCase)));
}
