std::stacktrace_entry::source_file
(C++17)Returns the presumed or actual name of the source file that lexically contains the expression or statement whose evaluation is represented by *this, or an empty string on failure other than allocation failure, e.g. when *this is empty.
Either source_file returns the presumed source file name and source_line returns the presumed line number, or source_file returns the actual source file name and source_line returns the actual line number.
[edit] Parameters
(none)
[edit] Return value
The name of the source file specified above on success, an empty string on failure other than allocation failure.
[edit] Exceptions
Throws std::bad_alloc if memory for the internal data structures or the resulting string cannot be allocated.
[edit] Notes
The presumed name of the source file is what the predefined macro __FILE__ expands to, and can be changed by the #line directive.
Reason: definition of "actual name" is missing (LWG issue 3507)
Custom allocators support for this function is not provided, because the implementations usually require platform specific allocations, system calls and a lot of CPU intensive work, while a custom allocator does not provide benefits for this function as the platform specific operations take an order of magnitude more time than the allocation.
[edit] Example
Reason: no example