std::basic_stacktrace<Allocator>::empty

 

C++

Compiler support

Freestanding and hosted

Language

Standard library headers

Named requirements

Feature test macros (C++20)

Language support library

Concepts library (C++20)

Diagnostics library

General utilities library

Strings library

Containers library

Iterators library

Ranges library (C++20)

Algorithms library

Numerics library

Localizations library

Input/output library

Filesystem library (C++17)

Regular expressions library (C++11)

Atomic operations library (C++11)

Thread support library (C++11)

Technical specifications

Symbols index

External libraries

 

Utilities library

Language support Type support (basic types, RTTI, type traits)      Library feature-test macros (C++20) Dynamic memory management Program utilities Error handling Coroutine support (C++20) Variadic functions is_constant_evaluated (C++20) launder (C++17) initializer_list (C++11) source_location (C++20) Three-way comparison (C++20) 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) strong_order (C++20) weak_order (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_neqis_ltis_lteqis_gtis_gteq (C++20)(C++20)(C++20)(C++20)(C++20)(C++20)

General utilities Date and time Function objects Formatting library (C++20) bitset hash (C++11) integer_sequence (C++14) 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) in_range (C++20) Swap and type operations swap ranges::swap (C++20) exchange (C++14) declval (C++11) forward (C++11) move (C++11) move_if_noexcept (C++11) as_const (C++17) to_underlying (C++23) Common vocabulary types pair tuple (C++11) optional (C++17) any (C++17) variant (C++17) tuple_size (C++11) tuple_element (C++11) apply (C++17) make_from_tuple (C++17) Elementary string conversions to_chars (C++17) from_chars (C++17) chars_format (C++17)

 

Error handling

Exception handling exception uncaught_exceptionuncaught_exceptions (until C++20)(C++17) exception_ptr (C++11) make_exception_ptr (C++11) current_exception (C++11) rethrow_exception (C++11) nested_exception (C++11) throw_with_nested (C++11) rethrow_if_nested (C++11) Exception handling failures terminate terminate_handler get_terminate (C++11) set_terminate bad_exception unexpected (until C++17) unexpected_handler (until C++17) get_unexpected (C++11)(until C++17) set_unexpected (until C++17) Error codes Error codes errno

Exception categories logic_error invalid_argument domain_error length_error out_of_range runtime_error range_error overflow_error underflow_error tx_exception (TM TS) System error support error_category (C++11) generic_category (C++11) system_category (C++11) error_condition (C++11) errc (C++11) error_code (C++11) system_error (C++11) Assertions assert Stacktrace stacktrace_entry (C++23) basic_stacktrace (C++23)

 

std::basic_stacktrace

Member functions

basic_stacktrace::basic_stacktrace (C++23)

basic_stacktrace::~basic_stacktrace (C++23)

basic_stacktrace::operator= (C++23)

basic_stacktrace::current (C++23)

basic_stacktrace::get_allocator (C++23)

Iterators

basic_stacktrace::beginbasic_stacktrace::cbegin (C++23)(C++23)

basic_stacktrace::endbasic_stacktrace::cend (C++23)(C++23)

basic_stacktrace::rbeginbasic_stacktrace::crbegin (C++23)(C++23)

basic_stacktrace::rendbasic_stacktrace::crend (C++23)(C++23)

Capacity

basic_stacktrace::empty (C++23)

basic_stacktrace::size (C++23)

basic_stacktrace::max_size (C++23)

Element access

basic_stacktrace::operator[] (C++23)

basic_stacktrace::at (C++23)

Modifiers

basic_stacktrace::swap (C++23)

Non-member functions

operator== operator<=> (C++23)(C++23)

std::swap (C++23)

to_string (C++23)

operator<< (C++23)

Helper classes

hash<basic_stacktrace> (C++23)

 

[[nodiscard]] bool empty() const noexcept;		(since C++23)

Checks if the stacktrace has no stacktrace entries.

Parameters

(none)

Return value

true if the stacktrace is empty, false otherwise.

Complexity

Constant.

Example

Run this code

#include <stacktrace>
#include <iostream>
 
int main()
{
    std::cout << std::boolalpha;
    std::stacktrace bktr;
    std::cout << "Initially, bktr.empty(): " << bktr.empty() << '\n';
 
    bktr = std::stacktrace::current();
    std::cout << "After getting entries, bktr.empty(): " << bktr.empty() << '\n';
}

Possible output:

Initially, bktr.empty(): true
After getting entries, bktr.empty(): false

See also

size (C++23)

returns the number of stacktrace entries (public member function)