This enumeration indicates the types of options that can be accepted on the command line:
ovtNone: Indicates an invalid option; not really used
ovtFlag: A flag value, which is assumed to be False unless it is specified on the command-line. A flag value might be specified as --flag when passed on the command line. Represented by instances of ACommandLineFlag.
ovtSwitch: A switch, which may be True or False. Unlike flag values, the value of a switch must be explicitly set on the command line. A switch might be specified as --switch=y or --switch=false when passed on the command line. Represented by instances of ACommandLineSwitch.
ovtNumber: A numeric value, either integer or floating-point. The only constraints on the value are the limits of the int64 or double types. A numeric value might be specified as --value=23 or --value=42.0 when passed on the command line. Represented by instances of ACommandLineNumber.
ovtIntegerRange, ovtFloatRange: A numeric value that must fall between a minimum and maximum value. Represented by instances of ACommandLineIntegerRange and ACommandLineFloatRange.
ovtString: A string value. A string value might be specified as --value=text or --value="text" when passed on the command line. Represented by instances of ACommandLineString.
ovtMultipleChoice: A value that must match one of a list of provided values. Represented by instances of ACommandLineChoice.
ovtList: A value that can be specified more than once on the command line; each occurrence is collected into a list of values. Represented by instances of ACommandLineList.
ovtRest: An argument that is specified without a name preceding it. These are usually used to indicate file names. This value is combined with one of the above values.
