28
Text processing library
[text]
28.6
Regular expressions library
[re]
28.6.9
Class template
match_
results
[re.results]
28.6.9.4
Size
[re.results.size]
🔗
size_type size
(
)
const
;
1
#
Returns
: One plus the number of marked sub-expressions in the regular expression that was matched if
*
this
represents the result of a successful match
.
Otherwise returns
0
.
[
Note
1
:
The state of a
match_
results
object can be modified only by passing that object to
regex_
match
or
regex_
search
.
Subclauses
[re.
alg.
match]
and
[re.
alg.
search]
specify the effects of those algorithms on their
match_
results
arguments
.
—
end note
]
🔗
size_type max_size
(
)
const
;
2
#
Returns
: The maximum number of
sub_
match
elements that can be stored in
*
this
.
🔗
bool
empty
(
)
const
;
3
#
Returns
:
size
(
)
=
=
0
.