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Program support utilities - 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 [edit] Utilities library Language support Type support (basic types, RTTI) Library feature-test macros (C++20) Program utilities Variadic functions initializer_list

(C++11)

is_constant_evaluated

(C++20)

is_within_lifetime

(C++26)

source_location

(C++20)

Coroutine support (C++20) Contract support (C++26) Three-way comparison three_way_comparablethree_way_comparable_with

(C++20)(C++20)

strong_ordering

(C++20)

weak_ordering

(C++20)

partial_ordering

(C++20)

common_comparison_category

(C++20)

compare_three_way_result

(C++20)

compare_three_way

(C++20)

(C++20)

(C++20)

partial_order

(C++20)

compare_strong_order_fallback

(C++20)

compare_weak_order_fallback

(C++20)

compare_partial_order_fallback

(C++20)

is_eqis_ltis_lteq

(C++20)(C++20)(C++20)

is_neqis_gtis_gteq

(C++20)(C++20)(C++20)

General utilities Function objects Bit manipulation (C++20) C-style bit manipulation (C++26) bitset hash

(C++11)

Relational operators (deprecated in C++20) rel_ops::operator!=rel_ops::operator> rel_ops::operator<=rel_ops::operator>= Integer comparison functions cmp_equalcmp_lesscmp_less_than

(C++20)(C++20)(C++20)

cmp_not_equalcmp_greatercmp_greater_than

(C++20)(C++20)(C++20)

(C++20)

Swap and type operations swap ranges::swap

(C++20)

(C++14)

(C++11)

to_underlying

(C++23)

(C++11)

(C++23)

(C++11)

move_if_noexcept

(C++11)

(C++17)

Common vocabulary types pair tuple

(C++11)

(C++17)

any

(C++17)

(C++17)

(C++11)

tuple_element

(C++11)

(C++17)

make_from_tuple

(C++17)

(C++23)

[edit] Program support utilities Program termination abort exit quick_exit

(C++11)

(C++11)

atexit at_quick_exit

(C++11)

EXIT_SUCCESSEXIT_FAILURE Unreachable control flow unreachable

(C++23)

Communicating with the environment system getenv Signals signal raise sig_atomic_t SIG_DFLSIG_IGN SIG_ERR Signal types SIGABRTSIGFPESIGILL SIGINTSIGSEGVSIGTERM Non-local jumps setjmp longjmp Types jmp_buf [edit]

Contents

[edit] Program termination

The following functions manage program termination and resource cleanup.

Defined in header

<cstdlib> abort causes abnormal program termination (without cleaning up)
(function) [edit] exit causes normal program termination with cleaning up
(function) [edit] quick_exit

(C++11)

causes quick program termination without completely cleaning up
(function) [edit] _Exit

(C++11)

causes normal program termination without cleaning up
(function) [edit] atexit registers a function to be called on std::exit() invocation
(function) [edit] at_quick_exit

(C++11)

registers a function to be called on std::quick_exit invocation
(function) [edit] EXIT_SUCCESSEXIT_FAILURE indicates program execution status
(macro constant) [edit] Unreachable control flow

Defined in header

<utility> unreachable

(C++23)

marks unreachable point of execution
(function) [edit] (since C++23) [edit] Communicating with the environment

Defined in header

<cstdlib> system calls the host environment's command processor
(function) [edit] getenv access to the list of environment variables
(function) [edit] [edit] Signals

Several functions and macro constants for signal management are provided.

Defined in header

<csignal> signal sets a signal handler for particular signal
(function) [edit] raise runs the signal handler for particular signal
(function) [edit] sig_atomic_t the integer type that can be accessed as an atomic entity from an asynchronous signal handler
(typedef) SIG_DFLSIG_IGN defines signal handling strategies
(macro constant) [edit] SIG_ERR return value of signal specifying that an error was encountered
(macro constant) [edit] Signal types SIGABRTSIGFPESIGILLSIGINTSIGSEGVSIGTERM defines signal types
(macro constant) [edit] [edit] Non-local jumps

Defined in header

<csetjmp> setjmp saves the context
(function macro) [edit] longjmp jumps to specified location
(function) [edit] Types jmp_buf execution context type
(typedef) [edit] [edit] See also C documentation

for

Program support utilities

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