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All overloaded tt(format) members and all regular expression matching
functions accept a final
tt(regex_constants::match_flag_type)hi(match_flag_type) argument, which is a
bit-masked type, for which the tt(bit_or) operator can be used. All tt(format)
members by default specify the argument tt(match_default).
The tt(match_flag_type) enumeration defines the following values (below,
`rangett(first, last)' refers to the character sequence being matched).
itemization(
iti(format_default) (not a bit-mask value, but a default value which is
equal to 0). With just this specification ECMAScript rules are used to
construct strings in tt(std::regex_replace);
iti(format_first_only): tt(std::regex_replace) only replaces the first
match;
iti(format_no_copy): non-matching strings are not passed to the output
by tt(std::regex_replace);
iti(format_sed): POSIX bf(sed)(1) rules are used to construct strings in
tt(std::regex_replace);
iti(match_any): if multiple matches are possible, then any match is an
acceptable result;
iti(match_continuous): sub-sequences are only matching if they start at
tt(first);
iti(match_not_bol): the first character in rangett(first, last) is treated
as an ordinary character: tt(^) does not match rangett(first, first);
iti(match_not_bow): tt(\b) does not match rangett(first, first);
iti(match_default) (not a bit-mask value, but equal to 0): the default
value of the final argument that's passed to the regular expression
matching functions and tt(match_results::format) member. ECMAScript
rules are used to construct strings in tt(std::regex_replace);
iti(match_not_eol): the last character in rangett(first, last) is treated
as an ordinary character: tt($) does not match rangett(last,last);
iti(match_not_eow): tt(\b) does not match rangett(last, last);
iti(match_not_null): empty sequences are not considered matches;
iti(match_prev_avail): tt(--first) refers to a valid character
position. When specified tt(match_not_bol) and tt(match_not_bow) are
ignored;
)
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