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cxxopts.hpp
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/*
Copyright (c) 2014, 2015, 2016 Jarryd Beck
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
*/
#ifndef CXX_OPTS_HPP
#define CXX_OPTS_HPP
#if defined(__GNUC__)
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wnon-virtual-dtor"
#endif
#include <cstring>
#include <exception>
#include <iostream>
#include <map>
#include <memory>
#include <regex>
#include <sstream>
#include <string>
#include <unordered_set>
#include <vector>
//when we ask cxxopts to use Unicode, help strings are processed using ICU,
//which results in the correct lengths being computed for strings when they
//are formatted for the help output
//it is necessary to make sure that <unicode/unistr.h> can be found by the
//compiler, and that icu-uc is linked in to the binary.
#ifdef CXXOPTS_USE_UNICODE
#include <unicode/unistr.h>
namespace
cxxopts
{
typedef
icu
::
UnicodeString
String
;
inline
String
toLocalString
(
std
::
string
s
)
{
return
icu
::
UnicodeString
::
fromUTF8
(
s
);
}
class
UnicodeStringIterator
:
public
std
::
iterator
<
std
::
forward_iterator_tag
,
int32_t
>
{
public
:
UnicodeStringIterator
(
const
icu
::
UnicodeString
*
s
,
int32_t
pos
)
:
s
(
s
)
,
i
(
pos
)
{
}
value_type
operator
*
()
const
{
return
s
->
char32At
(
i
);
}
bool
operator
==
(
const
UnicodeStringIterator
&
rhs
)
const
{
return
s
==
rhs
.
s
&&
i
==
rhs
.
i
;
}
bool
operator
!=
(
const
UnicodeStringIterator
&
rhs
)
const
{
return
!
(
*
this
==
rhs
);
}
UnicodeStringIterator
&
operator
++
()
{
++
i
;
return
*
this
;
}
UnicodeStringIterator
operator
+
(
int32_t
v
)
{
return
UnicodeStringIterator
(
s
,
i
+
v
);
}
private
:
const
icu
::
UnicodeString
*
s
;
int32_t
i
;
};
inline
String
&
stringAppend
(
String
&
s
,
String
a
)
{
return
s
.
append
(
std
::
move
(
a
));
}
inline
String
&
stringAppend
(
String
&
s
,
int
n
,
UChar32
c
)
{
for
(
int
i
=
0
;
i
!=
n
;
++
i
)
{
s
.
append
(
c
);
}
return
s
;
}
template
<
typename
Iterator
>
String
&
stringAppend
(
String
&
s
,
Iterator
begin
,
Iterator
end
)
{
while
(
begin
!=
end
)
{
s
.
append
(
*
begin
);
++
begin
;
}
return
s
;
}
inline
size_t
stringLength
(
const
String
&
s
)
{
return
s
.
length
();
}
inline
std
::
string
toUTF8String
(
const
String
&
s
)
{
std
::
string
result
;
s
.
toUTF8String
(
result
);
return
result
;
}
inline
bool
empty
(
const
String
&
s
)
{
return
s
.
isEmpty
();
}
}
namespace
std
{
cxxopts
::
UnicodeStringIterator
begin
(
const
icu
::
UnicodeString
&
s
)
{
return
cxxopts
::
UnicodeStringIterator
(
&
s
,
0
);
}
cxxopts
::
UnicodeStringIterator
end
(
const
icu
::
UnicodeString
&
s
)
{
return
cxxopts
::
UnicodeStringIterator
(
&
s
,
s
.
length
());
}
}
//ifdef CXXOPTS_USE_UNICODE
#else
namespace
cxxopts
{
typedef
std
::
string
String
;
template
<
typename
T
>
T
toLocalString
(
T
&&
t
)
{
return
t
;
}
inline
size_t
stringLength
(
const
String
&
s
)
{
return
s
.
length
();
}
inline
String
&
stringAppend
(
String
&
s
,
String
a
)
{
return
s
.
append
(
std
::
move
(
a
));
}
inline
String
&
stringAppend
(
String
&
s
,
size_t
n
,
char
c
)
{
return
s
.
append
(
n
,
c
);
}
template
<
typename
Iterator
>
String
&
stringAppend
(
String
&
s
,
Iterator
begin
,
Iterator
end
)
{
return
s
.
append
(
begin
,
end
);
}
template
<
typename
T
>
std
::
string
toUTF8String
(
T
&&
t
)
{
return
std
::
forward
<
T
>
(
t
);
}
inline
bool
empty
(
const
std
::
string
&
s
)
{
return
s
.
empty
();
}
}
//ifdef CXXOPTS_USE_UNICODE
#endif
namespace
cxxopts
{
class
Value
:
public
std
::
enable_shared_from_this
<
Value
>
{
public
:
virtual
void
parse
(
const
std
::
string
&
text
)
const
=
0
;
virtual
void
parse
()
const
=
0
;
virtual
bool
has_arg
()
const
=
0
;
virtual
bool
has_default
()
const
=
0
;
virtual
bool
is_container
()
const
=
0
;
virtual
bool
has_implicit
()
const
=
0
;
virtual
std
::
string
get_default_value
()
const
=
0
;
virtual
std
::
string
get_implicit_value
()
const
=
0
;
virtual
std
::
shared_ptr
<
Value
>
default_value
(
const
std
::
string
&
value
)
=
0
;
virtual
std
::
shared_ptr
<
Value
>
implicit_value
(
const
std
::
string
&
value
)
=
0
;
};
class
OptionException
:
public
std
::
exception
{
public
:
OptionException
(
const
std
::
string
&
message
)
:
m_message
(
message
)
{
}
virtual
const
char
*
what
()
const
noexcept
{
return
m_message
.
c_str
();
}
private
:
std
::
string
m_message
;
};
class
OptionSpecException
:
public
OptionException
{
public
:
OptionSpecException
(
const
std
::
string
&
message
)
:
OptionException
(
message
)
{
}
};
class
OptionParseException
:
public
OptionException
{
public
:
OptionParseException
(
const
std
::
string
&
message
)
:
OptionException
(
message
)
{
}
};
class
option_exists_error
:
public
OptionSpecException
{
public
:
option_exists_error
(
const
std
::
string
&
option
)
:
OptionSpecException
(
u8
"Option ‘"
+
option
+
u8
"’ already exists"
)
{
}
};
class
invalid_option_format_error
:
public
OptionSpecException
{
public
:
invalid_option_format_error
(
const
std
::
string
&
format
)
:
OptionSpecException
(
u8
"Invalid option format ‘"
+
format
+
u8
"’"
)
{
}
};
class
option_not_exists_exception
:
public
OptionParseException
{
public
:
option_not_exists_exception
(
const
std
::
string
&
option
)
:
OptionParseException
(
u8
"Option ‘"
+
option
+
u8
"’ does not exist"
)
{
}
};
class
missing_argument_exception
:
public
OptionParseException
{
public
:
missing_argument_exception
(
const
std
::
string
&
option
)
:
OptionParseException
(
u8
"Option ‘"
+
option
+
u8
"’ is missing an argument"
)
{
}
};
class
option_requires_argument_exception
:
public
OptionParseException
{
public
:
option_requires_argument_exception
(
const
std
::
string
&
option
)
:
OptionParseException
(
u8
"Option ‘"
+
option
+
u8
"’ requires an argument"
)
{
}
};
class
option_not_has_argument_exception
:
public
OptionParseException
{
public
:
option_not_has_argument_exception
(
const
std
::
string
&
option
,
const
std
::
string
&
arg
)
:
OptionParseException
(
u8
"Option ‘"
+
option
+
u8
"’ does not take an argument, but argument‘"
+
arg
+
"’ given"
)
{
}
};
class
option_not_present_exception
:
public
OptionParseException
{
public
:
option_not_present_exception
(
const
std
::
string
&
option
)
:
OptionParseException
(
u8
"Option ‘"
+
option
+
u8
"’ not present"
)
{
}
};
class
argument_incorrect_type
:
public
OptionParseException
{
public
:
argument_incorrect_type
(
const
std
::
string
&
arg
)
:
OptionParseException
(
u8
"Argument ‘"
+
arg
+
u8
"’ failed to parse"
)
{
}
};
namespace
values
{
template
<
typename
T
>
void
parse_value
(
const
std
::
string
&
text
,
T
&
value
)
{
std
::
istringstream
is
(
text
);
if
(
!
(
is
>>
value
))
{
throw
argument_incorrect_type
(
text
);
}
if
(
is
.
rdbuf
()
->
in_avail
()
!=
0
)
{
throw
argument_incorrect_type
(
text
);
}
}
inline
void
parse_value
(
const
std
::
string
&
/*text*/
,
bool
&
value
)
{
//TODO recognise on, off, yes, no, enable, disable
//so that we can write --long=yes explicitly
value
=
true
;
}
inline
void
parse_value
(
const
std
::
string
&
text
,
std
::
string
&
value
)
{
value
=
text
;
}
template
<
typename
T
>
void
parse_value
(
const
std
::
string
&
text
,
std
::
vector
<
T
>&
value
)
{
T
v
;
parse_value
(
text
,
v
);
value
.
push_back
(
v
);
}
template
<
typename
T
>
struct
value_has_arg
{
static
constexpr
bool
value
=
true
;
};
template
<>
struct
value_has_arg
<
bool
>
{
static
constexpr
bool
value
=
false
;
};
template
<
typename
T
>
struct
type_is_container
{
static
constexpr
bool
value
=
false
;
};
template
<
typename
T
>
struct
type_is_container
<
std
::
vector
<
T
>>
{
static
constexpr
bool
value
=
true
;
};
template
<
typename
T
>
class
standard_value
:
public
Value
{
public
:
standard_value
()
:
m_result
(
std
::
make_shared
<
T
>
())
,
m_store
(
m_result
.
get
())
{
}
standard_value
(
T
*
t
)
:
m_store
(
t
)
{
}
standard_value
(
const
standard_value
&
)
=
delete
;
standard_value
&
operator
=
(
const
standard_value
&
)
=
delete
;
void
parse
(
const
std
::
string
&
text
)
const
{
if
(
m_implicit
&&
text
.
empty
())
{
parse_value
(
m_implicit_value
,
*
m_store
);
}
else
{
parse_value
(
text
,
*
m_store
);
}
}
bool
is_container
()
const
{
return
type_is_container
<
T
>::
value
;
}
void
parse
()
const
{
parse_value
(
m_default_value
,
*
m_store
);
}
bool
has_arg
()
const
{
return
value_has_arg
<
T
>::
value
;
}
bool
has_default
()
const
{
return
m_default
;
}
bool
has_implicit
()
const
{
return
m_implicit
;
}
virtual
std
::
shared_ptr
<
Value
>
default_value
(
const
std
::
string
&
value
){
m_default
=
true
;
m_default_value
=
value
;
return
shared_from_this
();
}
virtual
std
::
shared_ptr
<
Value
>
implicit_value
(
const
std
::
string
&
value
){
m_implicit
=
true
;
m_implicit_value
=
value
;
return
shared_from_this
();
}
std
::
string
get_default_value
()
const
{
return
m_default_value
;
}
std
::
string
get_implicit_value
()
const
{
return
m_implicit_value
;
}
const
T
&
get
()
const
{
if
(
m_store
==
nullptr
)
{
return
*
m_result
;
}
else
{
return
*
m_store
;
}
}
protected
:
std
::
shared_ptr
<
T
>
m_result
;
T
*
m_store
;
bool
m_default
{
false
};
std
::
string
m_default_value
{};
bool
m_implicit
=
false
;
std
::
string
m_implicit_value
{};
};
}
template
<
typename
T
>
std
::
shared_ptr
<
Value
>
value
()
{
return
std
::
make_shared
<
values
::
standard_value
<
T
>>
();
}
template
<
typename
T
>
std
::
shared_ptr
<
Value
>
value
(
T
&
t
)
{
return
std
::
make_shared
<
values
::
standard_value
<
T
>>
(
&
t
);
}
class
OptionAdder
;
class
OptionDetails
{
public
:
OptionDetails
(
const
String
&
description
,
std
::
shared_ptr
<
const
Value
>
value
)
:
m_desc
(
description
)
,
m_value
(
value
)
,
m_count
(
0
)
{
}
const
String
&
description
()
const
{
return
m_desc
;
}
bool
has_arg
()
const
{
return
m_value
->
has_arg
();
}
void
parse
(
const
std
::
string
&
text
)
{
m_value
->
parse
(
text
);
++
m_count
;
}
void
parse_default
()
{
m_value
->
parse
();
}
int
count
()
const
{
return
m_count
;
}
const
Value
&
value
()
const
{
return
*
m_value
;
}
template
<
typename
T
>
const
T
&
as
()
const
{
#ifdef CXXOPTS_NO_RTTI
return
static_cast
<
const
values
::
standard_value
<
T
>&>
(
*
m_value
).
get
();
#else
return
dynamic_cast
<
const
values
::
standard_value
<
T
>&>
(
*
m_value
).
get
();
#endif
}
private
:
String
m_desc
;
std
::
shared_ptr
<
const
Value
>
m_value
;
int
m_count
;
};
struct
HelpOptionDetails
{
std
::
string
s
;
std
::
string
l
;
String
desc
;
bool
has_arg
;
bool
has_default
;
std
::
string
default_value
;
bool
has_implicit
;
std
::
string
implicit_value
;
std
::
string
arg_help
;
bool
is_container
;
};
struct
HelpGroupDetails
{
std
::
string
name
{};
std
::
string
description
{};
std
::
vector
<
HelpOptionDetails
>
options
{};
};
class
Options
{
public
:
Options
(
std
::
string
program
,
std
::
string
help_string
=
""
)
:
m_program
(
std
::
move
(
program
))
,
m_help_string
(
toLocalString
(
std
::
move
(
help_string
)))
,
m_next_positional
(
m_positional
.
end
())
{
}
inline
void
parse
(
int
&
argc
,
char
**&
argv
);
inline
OptionAdder
add_options
(
std
::
string
group
=
""
);
inline
void
add_option
(
const
std
::
string
&
group
,
const
std
::
string
&
s
,
const
std
::
string
&
l
,
std
::
string
desc
,
std
::
shared_ptr
<
const
Value
>
value
,
std
::
string
arg_help
);
int
count
(
const
std
::
string
&
o
)
const
{
auto
iter
=
m_options
.
find
(
o
);
if
(
iter
==
m_options
.
end
())
{
return
0
;
}
return
iter
->
second
->
count
();
}
const
OptionDetails
&
operator
[](
const
std
::
string
&
option
)
const
{
auto
iter
=
m_options
.
find
(
option
);
if
(
iter
==
m_options
.
end
())
{
throw
option_not_present_exception
(
option
);
}
return
*
iter
->
second
;
}
//parse positional arguments into the given option
inline
void
parse_positional
(
std
::
string
option
);
inline
void
parse_positional
(
std
::
vector
<
std
::
string
>
options
);
inline
std
::
string
help
(
const
std
::
vector
<
std
::
string
>&
groups
=
{
""
})
const
;
inline
const
std
::
vector
<
std
::
string
>
groups
()
const
;
inline
const
HelpGroupDetails
&
group_help
(
const
std
::
string
&
group
)
const
;
private
:
inline
void
add_one_option
(
const
std
::
string
&
option
,
std
::
shared_ptr
<
OptionDetails
>
details
);
inline
bool
consume_positional
(
std
::
string
a
);
inline
void
add_to_option
(
const
std
::
string
&
option
,
const
std
::
string
&
arg
);
inline
void
parse_option
(
std
::
shared_ptr
<
OptionDetails
>
value
,
const
std
::
string
&
name
,
const
std
::
string
&
arg
=
""
);
inline
void
checked_parse_arg
(
int
argc
,
char
*
argv
[],
int
&
current
,
std
::
shared_ptr
<
OptionDetails
>
value
,
const
std
::
string
&
name
);
inline
String
help_one_group
(
const
std
::
string
&
group
)
const
;
std
::
string
m_program
;
String
m_help_string
;
std
::
map
<
std
::
string
,
std
::
shared_ptr
<
OptionDetails
>>
m_options
{};
std
::
vector
<
std
::
string
>
m_positional
{};
std
::
vector
<
std
::
string
>::
iterator
m_next_positional
{};
std
::
unordered_set
<
std
::
string
>
m_positional_set
{};
//mapping from groups to help options
std
::
map
<
std
::
string
,
HelpGroupDetails
>
m_help
{};
};
class
OptionAdder
{
public
:
OptionAdder
(
Options
&
options
,
std
::
string
group
)
:
m_options
(
options
),
m_group
(
std
::
move
(
group
))
{
}
inline
OptionAdder
&
operator
()
(
const
std
::
string
&
opts
,
const
std
::
string
&
desc
,
std
::
shared_ptr
<
const
Value
>
value
=
::
cxxopts
::
value
<
bool
>
(),
std
::
string
arg_help
=
""
);
private
:
Options
&
m_options
;
std
::
string
m_group
;
};
}
namespace
cxxopts
{
namespace
{
constexpr
int
OPTION_LONGEST
=
30
;
constexpr
int
OPTION_DESC_GAP
=
2
;
std
::
basic_regex
<
char
>
option_matcher
(
"--([[:alnum:]][-_[:alnum:]]+)(=(.*))?|-([[:alnum:]]+)"
);
std
::
basic_regex
<
char
>
option_specifier
(
"(([[:alnum:]]),)?([[:alnum:]][-_[:alnum:]]+)"
);
String
format_option
(
const
HelpOptionDetails
&
o
)
{
auto
&
s
=
o
.
s
;
auto
&
l
=
o
.
l
;
String
result
=
" "
;
if
(
s
.
size
()
>
0
)
{
result
+=
"-"
+
toLocalString
(
s
)
+
","
;
}
else
{
result
+=
" "
;
}
if
(
l
.
size
()
>
0
)
{
result
+=
" --"
+
toLocalString
(
l
);
}
if
(
o
.
has_arg
)
{
auto
arg
=
o
.
arg_help
.
size
()
>
0
?
toLocalString
(
o
.
arg_help
)
:
"arg"
;
if
(
o
.
has_implicit
)
{
result
+=
" [="
+
arg
+
"(="
+
toLocalString
(
o
.
implicit_value
)
+
")]"
;
}
else
{
result
+=
" "
+
arg
;
}
}
return
result
;
}
String
format_description
(
const
HelpOptionDetails
&
o
,
size_t
start
,
size_t
width
)
{
auto
desc
=
o
.
desc
;
if
(
o
.
has_default
)
{
desc
+=
toLocalString
(
" (default: "
+
o
.
default_value
+
")"
);
}
String
result
;
auto
current
=
std
::
begin
(
desc
);
auto
startLine
=
current
;
auto
lastSpace
=
current
;
auto
size
=
size_t
{};
while
(
current
!=
std
::
end
(
desc
))
{
if
(
*
current
==
' '
)
{
lastSpace
=
current
;
}
if
(
size
>
width
)
{
if
(
lastSpace
==
startLine
)
{
stringAppend
(
result
,
startLine
,
current
+
1
);
stringAppend
(
result
,
"
\n
"
);
stringAppend
(
result
,
start
,
' '
);
startLine
=
current
+
1
;
lastSpace
=
startLine
;
}
else
{
stringAppend
(
result
,
startLine
,
lastSpace
);
stringAppend
(
result
,
"
\n
"
);
stringAppend
(
result
,
start
,
' '
);
startLine
=
lastSpace
+
1
;
}
size
=
0
;
}
else
{
++
size
;
}
++
current
;
}
//append whatever is left
stringAppend
(
result
,
startLine
,
current
);
return
result
;
}
}
OptionAdder
Options
::
add_options
(
std
::
string
group
)
{
return
OptionAdder
(
*
this
,
std
::
move
(
group
));
}
OptionAdder
&
OptionAdder
::
operator
()
(
const
std
::
string
&
opts
,
const
std
::
string
&
desc
,
std
::
shared_ptr
<
const
Value
>
value
,
std
::
string
arg_help
)
{
std
::
match_results
<
const
char
*>
result
;
std
::
regex_match
(
opts
.
c_str
(),
result
,
option_specifier
);
if
(
result
.
empty
())
{
throw
invalid_option_format_error
(
opts
);
}
const
auto
&
s
=
result
[
2
];
const
auto
&
l
=
result
[
3
];
m_options
.
add_option
(
m_group
,
s
.
str
(),
l
.
str
(),
desc
,
value
,
std
::
move
(
arg_help
));
return
*
this
;
}
void
Options
::
parse_option
(
std
::
shared_ptr
<
OptionDetails
>
value
,
const
std
::
string
&
/*name*/
,
const
std
::
string
&
arg
)
{
value
->
parse
(
arg
);
}
void
Options
::
checked_parse_arg
(
int
argc
,
char
*
argv
[],
int
&
current
,
std
::
shared_ptr
<
OptionDetails
>
value
,
const
std
::
string
&
name
)
{
if
(
current
+
1
>=
argc
)
{
if
(
value
->
value
().
has_implicit
())
{
parse_option
(
value
,
name
,
""
);
}
else
{
throw
missing_argument_exception
(
name
);
}
}
else
{
if
(
argv
[
current
+
1
][
0
]
==
'-'
&&
value
->
value
().
has_implicit
())
{
parse_option
(
value
,
name
,
""
);
}
else
{
parse_option
(
value
,
name
,
argv
[
current
+
1
]);
++
current
;
}
}
}
void
Options
::
add_to_option
(
const
std
::
string
&
option
,
const
std
::
string
&
arg
)
{
auto
iter
=
m_options
.
find
(
option
);
if
(
iter
==
m_options
.
end
())
{
throw
option_not_exists_exception
(
option
);
}
parse_option
(
iter
->
second
,
option
,
arg
);
}
bool
Options
::
consume_positional
(
std
::
string
a
)
{
while
(
m_next_positional
!=
m_positional
.
end
())
{
auto
iter
=
m_options
.
find
(
*
m_next_positional
);
if
(
iter
!=
m_options
.
end
())
{
if
(
!
iter
->
second
->
value
().
is_container
())
{
if
(
iter
->
second
->
count
()
==
0
)
{
add_to_option
(
*
m_next_positional
,
a
);
++
m_next_positional
;
return
true
;
}
else
{
++
m_next_positional
;
continue
;
}
}
else
{
add_to_option
(
*
m_next_positional
,
a
);
return
true
;
}
}
++
m_next_positional
;
}
return
false
;
}
void
Options
::
parse_positional
(
std
::
string
option
)
{
parse_positional
(
std
::
vector
<
std
::
string
>
{
option
});
}
void
Options
::
parse_positional
(
std
::
vector
<
std
::
string
>
options
)
{
m_positional
=
std
::
move
(
options
);
m_next_positional
=
m_positional
.
begin
();
m_positional_set
.
insert
(
m_positional
.
begin
(),
m_positional
.
end
());
}
void
Options
::
parse
(
int
&
argc
,
char
**&
argv
)
{
int
current
=
1
;
int
nextKeep
=
1
;
bool
consume_remaining
=
false
;
while
(
current
!=
argc
)
{
if
(
strcmp
(
argv
[
current
],
"--"
)
==
0
)
{
consume_remaining
=
true
;
++
current
;
break
;
}
std
::
match_results
<
const
char
*>
result
;
std
::
regex_match
(
argv
[
current
],
result
,
option_matcher
);
if
(
result
.
empty
())
{
//not a flag
//if true is returned here then it was consumed, otherwise it is
//ignored
if
(
consume_positional
(
argv
[
current
]))
{
}
else
{
argv
[
nextKeep
]
=
argv
[
current
];
++
nextKeep
;
}
//if we return from here then it was parsed successfully, so continue
}
else
{
//short or long option?
if
(
result
[
4
].
length
()
!=
0
)
{
const
std
::
string
&
s
=
result
[
4
];
for
(
std
::
size_t
i
=
0
;
i
!=
s
.
size
();
++
i
)
{
std
::
string
name
(
1
,
s
[
i
]);
auto
iter
=
m_options
.
find
(
name
);
if
(
iter
==
m_options
.
end
())
{
throw
option_not_exists_exception
(
name
);
}
auto
value
=
iter
->
second
;
//if no argument then just add it
if
(
!
value
->
has_arg
())
{
parse_option
(
value
,
name
);
}
else
{
//it must be the last argument
if
(
i
+
1
==
s
.
size
())
{
checked_parse_arg
(
argc
,
argv
,
current
,
value
,
name
);
}
else
if
(
value
->
value
().
has_implicit
())
{
parse_option
(
value
,
name
,
""
);
}
else
{
//error
throw
option_requires_argument_exception
(
name
);
}
}
}
}
else
if
(
result
[
1
].
length
()
!=
0
)
{
const
std
::
string
&
name
=
result
[
1
];
auto
iter
=
m_options
.
find
(
name
);
if
(
iter
==
m_options
.
end
())
{
throw
option_not_exists_exception
(
name
);
}
auto
opt
=
iter
->
second
;
//equals provided for long option?
if
(
result
[
3
].
length
()
!=
0
)
{
//parse the option given
//but if it doesn't take an argument, this is an error
if
(
!
opt
->
has_arg
())
{
throw
option_not_has_argument_exception
(
name
,
result
[
3
]);
}
parse_option
(
opt
,
name
,
result
[
3
]);
}
else
{
if
(
opt
->
has_arg
())
{
//parse the next argument
checked_parse_arg
(
argc
,
argv
,
current
,
opt
,
name
);
}
else
{
//parse with empty argument
parse_option
(
opt
,
name
);
}
}
}
}
++
current
;
}
for
(
auto
&
opt
:
m_options
)
{
auto
&
detail
=
opt
.
second
;
auto
&
value
=
detail
->
value
();
if
(
!
detail
->
count
()
&&
value
.
has_default
()){
detail
->
parse_default
();
}
}
if
(
consume_remaining
)
{
while
(
current
<
argc
)
{
consume_positional
(
argv
[
current
]);
++
current
;
}
}
argc
=
nextKeep
;
}
void
Options
::
add_option
(
const
std
::
string
&
group
,
const
std
::
string
&
s
,
const
std
::
string
&
l
,
std
::
string
desc
,
std
::
shared_ptr
<
const
Value
>
value
,
std
::
string
arg_help
)
{
auto
stringDesc
=
toLocalString
(
std
::
move
(
desc
));
auto
option
=
std
::
make_shared
<
OptionDetails
>
(
stringDesc
,
value
);
if
(
s
.
size
()
>
0
)
{
add_one_option
(
s
,
option
);
}
if
(
l
.
size
()
>
0
)
{
add_one_option
(
l
,
option
);
}
//add the help details
auto
&
options
=
m_help
[
group
];
options
.
options
.
emplace_back
(
HelpOptionDetails
{
s
,
l
,
stringDesc
,
value
->
has_arg
(),
value
->
has_default
(),
value
->
get_default_value
(),
value
->
has_implicit
(),
value
->
get_implicit_value
(),
std
::
move
(
arg_help
),
value
->
is_container
()});
}
void
Options
::
add_one_option
(
const
std
::
string
&
option
,
std
::
shared_ptr
<
OptionDetails
>
details
)
{
auto
in
=
m_options
.
emplace
(
option
,
details
);
if
(
!
in
.
second
)
{
throw
option_exists_error
(
option
);
}
}
String
Options
::
help_one_group
(
const
std
::
string
&
g
)
const
{
typedef
std
::
vector
<
std
::
pair
<
String
,
String
>>
OptionHelp
;
auto
group
=
m_help
.
find
(
g
);
if
(
group
==
m_help
.
end
())
{
return
""
;
}
OptionHelp
format
;
size_t
longest
=
0
;
String
result
;
if
(
!
g
.
empty
())
{
result
+=
toLocalString
(
" "
+
g
+
" options:
\n
"
);
}
for
(
const
auto
&
o
:
group
->
second
.
options
)
{
if
(
o
.
is_container
&&
m_positional_set
.
find
(
o
.
l
)
!=
m_positional_set
.
end
())
{
continue
;
}
auto
s
=
format_option
(
o
);
longest
=
std
::
max
(
longest
,
stringLength
(
s
));
format
.
push_back
(
std
::
make_pair
(
s
,
String
()));
}
longest
=
std
::
min
(
longest
,
static_cast
<
size_t
>
(
OPTION_LONGEST
));
//widest allowed description
auto
allowed
=
size_t
{
76
}
-
longest
-
OPTION_DESC_GAP
;
auto
fiter
=
format
.
begin
();
for
(
const
auto
&
o
:
group
->
second
.
options
)
{
if
(
o
.
is_container
&&
m_positional_set
.
find
(
o
.
l
)
!=
m_positional_set
.
end
())
{
continue
;
}
auto
d
=
format_description
(
o
,
longest
+
OPTION_DESC_GAP
,
allowed
);
result
+=
fiter
->
first
;
if
(
stringLength
(
fiter
->
first
)
>
longest
)
{
result
+=
'\n'
;
result
+=
toLocalString
(
std
::
string
(
longest
+
OPTION_DESC_GAP
,
' '
));
}
else
{
result
+=
toLocalString
(
std
::
string
(
longest
+
OPTION_DESC_GAP
-
stringLength
(
fiter
->
first
),
' '
));
}
result
+=
d
;
result
+=
'\n'
;
++
fiter
;
}
return
result
;
}
std
::
string
Options
::
help
(
const
std
::
vector
<
std
::
string
>&
groups
)
const
{
String
result
=
m_help_string
+
"
\n
Usage:
\n
"
+
toLocalString
(
m_program
)
+
" [OPTION...]"
;
if
(
m_positional
.
size
()
>
0
)
{
result
+=
" positional parameters"
;
}
result
+=
"
\n\n
"
;
for
(
std
::
size_t
i
=
0
;
i
<
groups
.
size
();
++
i
)
{
String
const
&
group_help
=
help_one_group
(
groups
[
i
]);
if
(
empty
(
group_help
))
continue
;
result
+=
group_help
;
if
(
i
<
groups
.
size
()
-
1
)
{
result
+=
'\n'
;
}
}
return
toUTF8String
(
result
);
}
const
std
::
vector
<
std
::
string
>
Options
::
groups
()
const
{
std
::
vector
<
std
::
string
>
g
;
std
::
transform
(
m_help
.
begin
(),
m_help
.
end
(),
std
::
back_inserter
(
g
),
[]
(
const
std
::
map
<
std
::
string
,
HelpGroupDetails
>::
value_type
&
pair
)
{
return
pair
.
first
;
}
);
return
g
;
}
const
HelpGroupDetails
&
Options
::
group_help
(
const
std
::
string
&
group
)
const
{
return
m_help
.
at
(
group
);
}
}
#if defined(__GNU__)
#pragma GCC diagnostic pop
#endif
#endif
//CXX_OPTS_HPP
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