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// Copyright Vladimir Prus 2004.
// Distributed under the Boost Software License, Version 1.0.
// (See accompanying file LICENSE_1_0.txt
// or copy at http://www.boost.org/LICENSE_1_0.txt)
#ifndef BOOST_CMDLINE_HPP_VP_2004_03_13
#define BOOST_CMDLINE_HPP_VP_2004_03_13
namespace boost { namespace program_options { namespace command_line_style {
/** Various possible styles of options.
There are "long" options, which start with "--" and "short",
which start with either "-" or "/". Both kinds can be allowed or
disallowed, see allow_long and allow_short. The allowed character
for short options is also configurable.
Option's value can be specified in the same token as name
("--foo=bar"), or in the next token.
It's possible to introduce long options by the same character as
short options, see allow_long_disguise.
Finally, guessing (specifying only prefix of option) and case
insensitive processing are supported.
*/
enum style_t {
/// Allow "--long_name" style
allow_long = 1,
/// Allow "-<single character" style
allow_short = allow_long << 1,
/// Allow "-" in short options
allow_dash_for_short = allow_short << 1,
/// Allow "/" in short options
allow_slash_for_short = allow_dash_for_short << 1,
/** Allow option parameter in the same token
for long option, like in
@verbatim
--foo=10
@endverbatim
*/
long_allow_adjacent = allow_slash_for_short << 1,
/** Allow option parameter in the next token for
long options. */
long_allow_next = long_allow_adjacent << 1,
/** Allow option parameter in the same token for
short options. */
short_allow_adjacent = long_allow_next << 1,
/** Allow option parameter in the next token for
short options. */
short_allow_next = short_allow_adjacent << 1,
/** Allow to merge several short options together,
so that "-s -k" become "-sk". All of the options
but last should accept no parameter. For example, if
"-s" accept a parameter, then "k" will be taken as
parameter, not another short option.
Dos-style short options cannot be sticky.
*/
allow_sticky = short_allow_next << 1,
/** Allow abbreviated spellings for long options,
if they unambiguously identify long option.
No long option name should be prefix of other
long option name if guessing is in effect.
*/
allow_guessing = allow_sticky << 1,
/** Ignore the difference in case for long options.
*/
long_case_insensitive = allow_guessing << 1,
/** Ignore the difference in case for short options.
*/
short_case_insensitive = long_case_insensitive << 1,
/** Ignore the difference in case for all options.
*/
case_insensitive = (long_case_insensitive | short_case_insensitive),
/** Allow long options with single option starting character,
e.g <tt>-foo=10</tt>
*/
allow_long_disguise = short_case_insensitive << 1,
/** The more-or-less traditional unix style. */
unix_style = (allow_short | short_allow_adjacent | short_allow_next
| allow_long | long_allow_adjacent | long_allow_next
| allow_sticky | allow_guessing
| allow_dash_for_short),
/** The default style. */
default_style = unix_style
};
}}}
#endif
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