Changes in Config:

• Custom error handler function (Config.errorHandler) now receives message text with ANSI styling if styling is enabled. One can use argparse.ansi.getUnstyledText function to remove any styling - this function returns a range of unstyled string objects which can be used as is or join'ed into a string if needed: message.getUnstyledText.join.

• Config.namedArgChar is renamed to Config.namedArgPrefix.

• Config.endOfArgs is renamed to Config.endOfNamedArgs.

• Config.helpStyle is renamed to Config.styling.

• Config.addHelp is renamed to Config.addHelpArgument.

• Config.arraySep is renamed to Config.valueSep.

Style.namedArgumentName is renamed to Style.argumentName.

Underlying type of ansiStylingArgument argument is changed. It can now be directly cast to boolean instead comparing against Config.StylingMode.

So if you use it:

  static auto color = ansiStylingArgument;

then you should replace

  if(args.color == Config.StylingMode.on)

with

  if(args.color)

@SubCommands UDA is removed. One should use SubCommand template instead of SumType

Simply replace

  @SubCommands SumType!(CMD1, CMD2, Default!CMD3) cmd;

with

  SubCommand!(CMD1, CMD2, Default!CMD3) cmd;

@TrailingArguments UDA is removed: all command line parameters that appear after double-dash -- are considered as positional arguments. So if those parameters are to be parsed, use @PositionalArgument instead of @TrailingArguments.

Functions for parsing customization (PreValidation, Parse, Validation and Action) now accept functions as runtime parameters instead of template arguments

For example, replace this

  .Parse     !((string s) { return cast(char) s[1]; })
  .Validation!((char v) { return v >= '0' && v <= '9'; })

with

  .Parse     ((string s) { return cast(char) s[1]; })
  .Validation((char v) { return v >= '0' && v <= '9'; })

HideFromHelp is renamed to Hidden and now also hides an argument from shell completion.

Dropped support for DMD-2.099.

• Argument is not allowed to be in multiple argument groups.
• Subcommand name can't start with Config.namedArgPrefix (dash - by default).

• ./prog -b -s=abc
• ./prog -b -s abc
• ./prog -b -sabc
• ./prog -bsabc
• ./prog -bs=abc

• ./prog --arg value1 value2 value3
• ./prog --arg=value1,value2,value3