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std::source_location::file_name

From cppreference.com
 
 
Utilities library
General utilities
Date and time
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Formatting library (C++20)
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Relational operators (deprecated in C++20)
Integer comparison functions
(C++20)
Swap and type operations
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Common vocabulary types
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Elementary string conversions
(C++17)
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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.

Contents

[edit] Parameters

(none)

[edit] Return value

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

[edit] Example

#if __has_include(<source_location>)
#include <source_location>
using std::source_location;
#elif __has_include(<experimental/source_location>)
#include <experimental/source_location>
using std::experimental::source_location;
#else
#error "<source_location> not found"
#endif
 
#include <iostream>
 
inline void print_this_file_name(
    const source_location& location = source_location::current())
{
    // Name of file that contains the call site of this function.
    std::cout << "File: " << location.file_name() << '\n';
}
 
auto main() -> int
{
    print_this_file_name();
}

Possible output:

File: main.cpp

[edit] See also

return the line number represented by this object
(public member function) [edit]
return the column number represented by this object
(public member function) [edit]
return the name of the function represented by this object, if any
(public member function) [edit]
C++ documentation for Filename and line information