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std::basic_regex constants

Da cppreference.com.
< cpp‎ | regex‎ | basic regex

 
 
Espressioni regolari libreria
Classi
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Classes
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basic_regex(C++11)
sub_match(C++11)
match_results(C++11)
Algoritmi
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Algorithms
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regex_match(C++11)
regex_search(C++11)
regex_replace(C++11)
Iteratori
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Iterators
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regex_iterator(C++11)
regex_token_iterator(C++11)
Eccezioni
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Exceptions
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regex_error(C++11)
Tratti
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Traits
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regex_traits(C++11)
Costanti
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Constants
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syntax_option_type(C++11)
match_flag_type(C++11)
error_type(C++11)
 
std::basic_regex
Funzioni membri
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Member Functions
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basic_regex::basic_regex
basic_regex::~basic_regex
basic_regex::operator=
basic_regex::assign
Osservatori
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Observers
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basic_regex::mark_count
basic_regex::flags
Locale
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Locale
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basic_regex::getloc
basic_regex::imbue
Modificatori
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Modifiers
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basic_regex::swap
Costanti
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Constants
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basic_regex constants
Non membri funzioni
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Non-member Functions
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swap(std::basic_regex)
 
Defined in header <regex>
static constexpr std::regex_constants::syntax_option_type icase =

    std::regex_constants::icase;
static constexpr std::regex_constants::syntax_option_type nosubs =
    std::regex_constants::nosubs;
static constexpr std::regex_constants::syntax_option_type optimize =
    std::regex_constants::optimize;
static constexpr std::regex_constants::syntax_option_type collate =
    std::regex_constants::collate;
static constexpr std::regex_constants::syntax_option_type ECMAScript =
    std::regex_constants::ECMAScript;
static constexpr std::regex_constants::syntax_option_type basic =
    std::regex_constants::basic;
static constexpr std::regex_constants::syntax_option_type extended =
    std::regex_constants::extended;
static constexpr std::regex_constants::syntax_option_type awk =
    std::regex_constants::awk;
static constexpr std::regex_constants::syntax_option_type grep =
    std::regex_constants::grep;
static constexpr std::regex_constants::syntax_option_type egrep =

    std::regex_constants::egrep;
std::basic_regex definisce diverse costanti che regolano in generale la sintassi corrispondente regex.
Original:
std::basic_regex defines several constants that govern general regex matching syntax.
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Queste costanti sono duplicati da std::regex_constants:
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These constants are duplicated from std::regex_constants:
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Valore
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Value
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Effect(s)
icase Character matching should be performed without regard to case.
nosubs When performing matches, no sub-expression matches should be stored in the supplied std::regex_match structure.
optimize Instructs the regular expression engine to make matching faster, with the potential cost of making construction slower. For example, this might mean converting a non-deterministic FSA to a deterministic FSA.
collate Character ranges of the form "[a-b]" will be locale sensitive.
ECMAScript Use the ECMAScript (JavaScript) regular expression grammar (ECMA-262 grammar documentation), modified to support collating elements, character classes, and equivalence classes from POSIX, and the character class aliases \d, \D, \s, \S, \w, and \W are made locale-sensitive
basic Use the basic POSIX regular expression grammar (grammar documentation).
extended Use the extended POSIX regular expression grammar (grammar documentation).
awk Use the regular expression grammar used by the awk utility in POSIX (grammar documentation)
grep Use the regular expression grammar used by the grep utility in POSIX. This is effectively the same as the basic option with the addition of newline '\n' as an alternation separator.
egrep Use the regular expression grammar used by the grep utility, with the -E option, in POSIX. This is effectively the same as the extended option with the addition of newline '\n' as an alternation separator in addtion to '|'.

[modifica] Vedi anche

Opzioni generali di controllo del comportamento delle regex
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general options controlling regex behavior
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(typedef) [edit]