public ArgumentInstance(ArgumentDescriptor descriptor, string value)
{
if (descriptor == null)
{
throw new ArgumentNullException("descriptor");
}
this.descriptor = descriptor;
this.value = value;
}
public ArgumentInstance(ArgumentDescriptor descriptor, string value)
{
Descriptor = descriptor ?? throw new ArgumentNullException("descriptor");
Value = value;
}
private static string TryGetMatchingPrefix(ArgumentDescriptor descriptor, string argument)
{
Debug.Assert(descriptor.Prefixes.Count(p => argument.StartsWith(p, ArgumentDescriptor.IdComparison)) < 2,
"Not expecting the argument to match multiple prefixes");
string match = null;
if (descriptor.IsVerb)
{
// Verbs match the whole argument
match = descriptor.Prefixes.FirstOrDefault(p => ArgumentDescriptor.IdComparer.Equals(p, argument));
}
else
{
// Prefixes only match the start
match = descriptor.Prefixes.FirstOrDefault(p => argument.StartsWith(p, ArgumentDescriptor.IdComparison));
}
return match;
}
/// <summary>
/// Attempts to find a descriptor for the current argument
/// </summary>
/// <param name="argument">The argument passed on the command line</param>
/// <param name="descriptor">The descriptor that matches the argument</param>
/// <param name="prefix">The specific prefix that was matched</param>
private bool TryGetMatchingDescriptor(string argument, out ArgumentDescriptor descriptor, out string prefix)
{
descriptor = null;
prefix = null;
bool found = false;
foreach (ArgumentDescriptor item in this.descriptors)
{
string match = TryGetMatchingPrefix(item, argument);
if (match != null)
{
descriptor = item;
prefix = match;
found = true;
break;
}
}
return found;
}
