private static void DisplayToken(IToken token)
{
var score = TokenWeightResolver.Invoke(token);
var tokenInfo = $"{token.GetType().Name}";
var valueInfo = "[value = {0}]";
var scoreInfo = $"[score = {score}]";
valueInfo = token switch
{
LiteralToken literalToken => string.Format(valueInfo, $"'{literalToken.Value}'"),
LiteralAmountToken literalAmountToken => string.Format(valueInfo, literalAmountToken.Amount),
FractionalAmountToken fractionalAmountToken => string.Format(valueInfo, GetRepresentation(fractionalAmountToken)),
RangeAmountToken rangeAmountToken => string.Format(valueInfo, GetRepresentation(rangeAmountToken)),
UnitToken unitToken => string.Format(valueInfo, unitToken.Unit),
FormToken formToken => string.Format(valueInfo, formToken.Form),
IngredientToken ingredientToken => string.Format(valueInfo, ingredientToken.Ingredient),
_ => string.Empty
};
var output = $"-> {tokenInfo}\n\t{valueInfo}\n\t{scoreInfo}";
Console.WriteLine(output);
}
/// <summary>
/// Visits a <see cref="RangeAmountToken"/>.
/// </summary>
/// <param name="token">A <see cref="RangeAmountToken"/> instance.</param>
public void Visit(RangeAmountToken token)
{
// A range token has two nested tokens, so we visit the first and store
// the value before visiting the second. This allows us to combine the two values.
token.LowerBound.Accept(this);
var lowerBoundAmount = _parseResult.Details.Amount;
token.UpperBound.Accept(this);
_parseResult.Details.Amount = $"{lowerBoundAmount}-{_parseResult.Details.Amount}";
}
private static string GetRepresentation(RangeAmountToken range)
{
return((range.LowerBound, range.UpperBound) switch
{
(LiteralAmountToken lowerBound, LiteralAmountToken upperBound) =>
$"{lowerBound.Amount}-{upperBound.Amount}",
(FractionalAmountToken lowerBound, FractionalAmountToken upperBound) =>
$"{GetRepresentation(lowerBound)}-{GetRepresentation(upperBound)}",
_ => throw new InvalidOperationException($"Unexpected range lower bound token type: {range.LowerBound.Type}")
});
private bool Range(InputBuffer buffer, out RangeAmountToken range) => ExecuteRules(GetRangeRules, buffer, out range);
