public Argument(ArgumentAttribute attribute, FieldInfo field, ErrorReporter reporter)
{
this.longName = Parser.LongName(attribute, field);
this.explicitShortName = Parser.ExplicitShortName(attribute);
this.shortName = Parser.ShortName(attribute, field);
this.hasHelpText = Parser.HasHelpText(attribute);
this.helpText = Parser.HelpText(attribute, field);
this.defaultValue = Parser.DefaultValue(attribute, field);
this.elementType = ElementType(field);
this.flags = Flags(attribute, field);
this.field = field;
this.seenValue = false;
this.reporter = reporter;
this.isDefault = attribute != null && attribute is DefaultArgumentAttribute;
this.isToggle = attribute.IsToggle;
if (IsCollection)
{
this.collectionValues = new ArrayList();
}
Debug.Assert(this.longName != null && this.longName != "");
Debug.Assert(!this.isDefault || !this.ExplicitShortName);
Debug.Assert(!IsCollection || AllowMultiple, "Collection arguments must have allow multiple");
Debug.Assert(!Unique || IsCollection, "Unique only applicable to collection arguments");
Debug.Assert(IsValidElementType(Type) ||
IsCollectionType(Type));
Debug.Assert((IsCollection && IsValidElementType(elementType)) ||
(!IsCollection && elementType == null));
Debug.Assert(!(this.IsRequired && this.HasDefaultValue), "Required arguments cannot have default value");
Debug.Assert(!this.HasDefaultValue || (this.defaultValue.GetType() == field.FieldType), "Type of default value must match field type");
}
private static object DefaultValue(ArgumentAttribute attribute, FieldInfo field)
{
return (attribute == null || !attribute.HasDefaultValue) ? null : attribute.DefaultValue;
}
private static ArgumentType Flags(ArgumentAttribute attribute, FieldInfo field)
{
if (attribute != null)
return attribute.Type;
else if (IsCollectionType(field.FieldType))
return ArgumentType.MultipleUnique;
else
return ArgumentType.AtMostOnce;
}
private static bool ExplicitShortName(ArgumentAttribute attribute)
{
return (attribute != null && !attribute.DefaultShortName);
}
private static bool HasHelpText(ArgumentAttribute attribute)
{
return (attribute != null && attribute.HasHelpText);
}
private static string HelpText(ArgumentAttribute attribute, FieldInfo field)
{
if (attribute == null)
return null;
else
return attribute.HelpText;
}
private static string ShortName(ArgumentAttribute attribute, FieldInfo field)
{
if (attribute is DefaultArgumentAttribute)
return null;
if (!ExplicitShortName(attribute))
return LongName(attribute, field).Substring(0,1);
return attribute.ShortName;
}
private static string LongName(ArgumentAttribute attribute, FieldInfo field)
{
return (attribute == null || attribute.DefaultLongName) ? field.Name : attribute.LongName;
}
