std::uint_least32_t source_line() const; | (since C++23) |
Returns a 1-based line number that lexically relates to the evaluation represented by *this, or 0 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.
(none).
The line number specified above on success, 0 on failure other than allocation failure.
Throws std::bad_alloc if memory for the internal data structures cannot be allocated.
The presumed line number is what the predefined macro __LINE__ expands to, and can be changed by the #line directive.
This function is not required to be noexcept because getting source line requires allocation on some platforms.
| return the line number represented by this object (public member function of std::source_location) |
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