internal static T GetValueOrDefault <T>(this ArgumentConversionResult result)
{
switch (result)
{
case SuccessfulArgumentConversionResult successful:
return((T)successful.Value !);
case FailedArgumentConversionResult failed:
throw new InvalidOperationException(failed.ErrorMessage);
case NoArgumentConversionResult _:
return(default !);
default:
return(default !);
}
}
internal static ArgumentConversionResult ConvertIfNeeded(
this ArgumentConversionResult conversionResult,
SymbolResult symbolResult,
Type toType)
{
if (conversionResult is null)
{
throw new ArgumentNullException(nameof(conversionResult));
}
switch (conversionResult)
{
case SuccessfulArgumentConversionResult successful when !toType.IsInstanceOfType(successful.Value):
return(ConvertObject(
conversionResult.Argument,
toType,
successful.Value));
case SuccessfulArgumentConversionResult successful
when toType == typeof(object) && conversionResult.Argument.Arity.MaximumNumberOfValues > 1 &&
successful.Value is string:
return(ConvertObject(
conversionResult.Argument,
typeof(IEnumerable <string>),
successful.Value));
case NoArgumentConversionResult _ when toType == typeof(bool):
return(Success(conversionResult.Argument, true));
case NoArgumentConversionResult _ when conversionResult.Argument.Arity.MinimumNumberOfValues > 0:
return(new MissingArgumentConversionResult(
conversionResult.Argument,
ValidationMessages.Instance.RequiredArgumentMissing(symbolResult)));
case NoArgumentConversionResult _ when conversionResult.Argument.Arity.MaximumNumberOfValues > 1:
return(Success(
conversionResult.Argument,
Array.Empty <string>()));
default:
return(conversionResult);
}
}
internal static object?GetValueOrDefault(this ArgumentConversionResult result) => result.GetValueOrDefault <object?>();
