std::operator<<(std::basic_stacktrace)
Defined in header <stacktrace> |
||
|---|---|---|
template< class CharT, class Traits, class Allocator >
std::basic_ostream<CharT, Traits>& operator<<( std::basic_ostream<CharT, Traits>& os,
const std::basic_stacktrace<Allocator>& st ); |
(since C++23) |
Inserts the description of st into the output stream os. Equivalent to return os << std::to_string(st);.
Parameters
| os | - | an output stream |
| st | - | a basic_stacktrace whose description is to be inserted |
Return value
os.
Exceptions
May throw implementation-defined exceptions.
Notes
Since std::string can only be outputted by std::ostream (not by e.g. std::wostream), it is effectively required that os be of type std::ostream&.
Example
#include <stacktrace>
#include <iostream>
int main()
{
std::cout << "The stacktrace obtained in the main function:\n";
std::cout << std::stacktrace::current() << '\n';
[]{
std::cout << "The stacktrace obtained in a nested lambda:\n";
std::cout << std::stacktrace::current() << '\n';
}();
}
Possible output:
The stacktrace obtained in the main function: 0# 0x0000000000402E7B in ./prog.exe 1# __libc_start_main in /lib/x86_64-linux-gnu/libc.so.6 2# 0x0000000000402CD9 in ./prog.exe The stacktrace obtained in a nested lambda: 0# 0x0000000000402DDA in ./prog.exe 1# 0x0000000000402EB2 in ./prog.exe 2# __libc_start_main in /lib/x86_64-linux-gnu/libc.so.6 3# 0x0000000000402CD9 in ./prog.exe
See also
|
(C++23)
|
performs stream output of stacktrace_entry (function template) |
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https://en.cppreference.com/w/cpp/utility/basic_stacktrace/operator_ltlt
