std::source_location::file_name

 

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std::source_location

Member functions

Creation

source_location::source_location

source_location::current

Field Access

source_location::line

source_location::column

source_location::file_name

source_location::function_name

 

constexpr const char* file_name() const noexcept;		(since C++20)

Returns the name of the current source file represented by this object, represented as a null-terminated byte string.

Parameters

(none)

Return value

The name of the current source file represented by this object, represented as a null-terminated byte string.

Example

Run this code

#include <iostream>
#include <source_location>
 
void print_this_file_name(
    std::source_location location = std::source_location::current())
{
    // Name of file that contains the call site of this function.
    std::cout << "File: " << location.file_name() << '\n';
}
 
int main()
{
#line 1 "cppreference.cpp"
    print_this_file_name();
}

Output:

File: cppreference.cpp

See also

line	return the line number represented by this object (public member function)
column	return the column number represented by this object (public member function)
function_name	return the name of the function represented by this object, if any (public member function)
source_file (C++23)	gets the name of the source file that lexically contains the expression or statement whose evaluation is represented by the stacktrace_entry (public member function of std::stacktrace_entry)
Filename and line information