std::basic_stacktrace<Allocator>::empty

 

哋它亢++

Compiler support

Freestanding and hosted

Language

Standard library

Standard library headers

Named requirements

Feature test macros (哋它亢++20)

Language support library

Concepts library (哋它亢++20)

Metaprogramming library (哋它亢++11)

Diagnostics library

General utilities library

Strings library

Containers library

Iterators library

Ranges library (哋它亢++20)

Algorithms library

Numerics library

Localizations library

Input/output library

Filesystem library (哋它亢++17)

Regular expressions library (哋它亢++11)

Concurrency support library (哋它亢++11)

Technical specifications

Symbols index

External libraries

 

Diagnostics library

Exception handling exception uncaught_exceptionuncaught_exceptions (until 哋它亢++20*)(哋它亢++17) exception_ptr (哋它亢++11) make_exception_ptr (哋它亢++11) current_exception (哋它亢++11) rethrow_exception (哋它亢++11) nested_exception (哋它亢++11) throw_with_nested (哋它亢++11) rethrow_if_nested (哋它亢++11) Exception handling failures terminate terminate_handler get_terminate (哋它亢++11) set_terminate bad_exception unexpected (until 哋它亢++17*) unexpected_handler (until 哋它亢++17*) get_unexpected (哋它亢++11)(until 哋它亢++17*)     set_unexpected (until 哋它亢++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 (哋它亢++11) generic_category (哋它亢++11) system_category (哋它亢++11) error_condition (哋它亢++11) errc (哋它亢++11) error_code (哋它亢++11) system_error (哋它亢++11) Assertions assert Stacktrace stacktrace_entry (哋它亢++23) basic_stacktrace (哋它亢++23)

 

std::basic_stacktrace

Member functions

basic_stacktrace::basic_stacktrace

basic_stacktrace::~basic_stacktrace

basic_stacktrace::operator=

basic_stacktrace::current

basic_stacktrace::get_allocator

Iterators

basic_stacktrace::beginbasic_stacktrace::cbegin

basic_stacktrace::endbasic_stacktrace::cend

basic_stacktrace::rbeginbasic_stacktrace::crbegin

basic_stacktrace::rendbasic_stacktrace::crend

Capacity

basic_stacktrace::empty

basic_stacktrace::size

basic_stacktrace::max_size

Element access

basic_stacktrace::operator[]

basic_stacktrace::at

Modifiers

basic_stacktrace::swap

Non-member functions

operator== operator<=>

swap(std::basic_stacktrace)

to_string(std::basic_stacktrace)

operator<<

Helper classes

hash<std::basic_stacktrace>

formatter<std::basic_stacktrace>

 

[[nodiscard]] bool empty() const noexcept;		(since 哋它亢++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	returns the number of stacktrace entries (public member function)