/// <inheritdoc/>
public bool TryParseIngredient(
ParserContext context,
IEnumerable <Template> templates,
out ParseResult parseResult)
{
var fullMatches = FindFullMatches(context, templates);
if (fullMatches.Any())
{
var bestMatchMetadata = _bestMatchHeuristic.Invoke(fullMatches);
parseResult = new ParseResult()
{
Details = new ParseResult.IngredientDetails(),
Metadata = bestMatchMetadata
};
var tokenVisitor = new ParserTokenVisitor(parseResult);
foreach (var token in parseResult.Metadata.Tokens)
{
token.Accept(tokenVisitor);
}
return(true);
}
parseResult = null;
return(false);
}
/// <inheritdoc/>
public bool TryParseIngredient(
ParserContext context,
IEnumerable <Template> templates,
out ParseResult parseResult)
{
var partialMatches = new List <ParseResult.ParseMetadata>();
foreach (var template in templates)
{
context.Buffer.Reset();
var result = template.TryReadTokens(context, out var tokens);
switch (result)
{
case TemplateMatchResult.NoMatch:
// Always skip non-matches.
continue;
case TemplateMatchResult.PartialMatch:
// Take a note of partial matches, so that we can find
// the best match when no full matches are found
partialMatches.Add(new ParseResult.ParseMetadata()
{
Template = template,
MatchResult = TemplateMatchResult.PartialMatch,
Tokens = tokens.ToList()
});
continue;
case TemplateMatchResult.FullMatch:
// Stop on the first full match
parseResult = new ParseResult()
{
Details = new ParseResult.IngredientDetails(),
Metadata = new ParseResult.ParseMetadata()
{
Template = template,
MatchResult = TemplateMatchResult.FullMatch,
Tokens = tokens.ToList()
}
};
VisitTokens(parseResult);
return(true);
default:
throw new ArgumentOutOfRangeException(
$"Encountered unknown template match result: {result}");
}
}
if (partialMatches.Any())
{
var bestMatchMetadata = _bestMatchHeuristic.Invoke(partialMatches);
parseResult = new ParseResult()
{
Details = new ParseResult.IngredientDetails(),
Metadata = bestMatchMetadata
};
VisitTokens(parseResult);
return(true);
}
parseResult = null;
return(false);
}