std::stacktrace_entry::source_file
std::string source_file() const; |
(since C++23) |
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.
Parameters
(none).
Return value
The name of the source file specified above on success, an empty string on failure other than allocation failure.
Exceptions
Throws std::bad_alloc if memory for the internal data structures or the resulting string cannot be allocated.
Notes
The presumed name of the source file is what the predefined macro __FILE__ expands to, and can be changed by the #line directive.
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.
Example
See also
| return the file name represented by this object (public member function of std::source_location) |
© cppreference.com
Licensed under the Creative Commons Attribution-ShareAlike Unported License v3.0.
https://en.cppreference.com/w/cpp/utility/stacktrace_entry/source_file
