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From cppreference.com
C++
Compiler support
Freestanding and hosted
Language
Standard library
Standard library headers
Named requirements
Feature test macros
(C++20)
Language support library
Concepts library
(C++20)
Diagnostics library
Memory management library
Metaprogramming library
(C++11)
General utilities library
Containers library
Iterators library
Ranges library
(C++20)
Algorithms library
Strings library
Text processing library
Numerics library
Date and time library
Input/output library
Filesystem library
(C++17)
Concurrency support library
(C++11)
Execution control library
(C++26)
Technical specifications
Symbols index
External libraries
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Text processing library
Localization library
Regular expressions library
(C++11)
Formatting library
(C++20)
Null-terminated sequence utilities
Byte strings
Multibyte strings
Wide strings
Primitive numeric conversions
to_chars
(C++17)
to_chars_result
(C++17)
from_chars
(C++17)
from_chars_result
(C++17)
chars_format
(C++17)
Text encoding identifications
text_encoding
(C++26)
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Regular expressions library
Classes
basic_regex
(C++11)
sub_match
(C++11)
match_results
(C++11)
Algorithms
regex_match
(C++11)
regex_search
(C++11)
regex_replace
(C++11)
Iterators
regex_iterator
(C++11)
regex_token_iterator
(C++11)
Exceptions
regex_error
(C++11)
Traits
regex_traits
(C++11)
Constants
syntax_option_type
(C++11)
match_flag_type
(C++11)
error_type
(C++11)
Regex Grammar
Modified ECMAScript-262
(C++11)
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std::basic_regex
Member Functions
basic_regex::basic_regex
basic_regex::~basic_regex
basic_regex::operator=
basic_regex::assign
Observers
basic_regex::mark_count
basic_regex::flags
Locale
basic_regex::getloc
basic_regex::imbue
Modifiers
basic_regex::swap
Constants
Non-member Functions
swap
(std::basic_regex)
Deduction guides
(C++17)
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