std::experimental::source_location::file_name

 

C++

Compiler support

Freestanding and hosted

Language

Standard library

Standard library headers

Named requirements

Feature test macros (C++20)

Language support library

Concepts library (C++20)

Diagnostics library

Memory management library

Metaprogramming library (C++11)

General utilities library

Containers library

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Ranges library (C++20)

Algorithms library

Strings library

Text processing library

Numerics library

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Input/output library

Filesystem library (C++17)

Concurrency support library (C++11)

Execution control library (C++26)

Technical specifications

Symbols index

External libraries

 

Experimental

Technical Specification

Filesystem library (filesystem TS)

Library fundamentals (library fundamentals TS)

Library fundamentals 2 (library fundamentals TS v2)

Library fundamentals 3 (library fundamentals TS v3)

Extensions for parallelism (parallelism TS)

Extensions for parallelism 2 (parallelism TS v2)

Extensions for concurrency (concurrency TS)

Extensions for concurrency 2 (concurrency TS v2)

Concepts (concepts TS)

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Reflection (reflection TS)

Mathematical special functions (special functions TR)

Experimental Non-TS

Pattern Matching

Linear Algebra

std::execution

Contracts

2D Graphics

 

Library fundamentals v2

experimental::propagate_const

experimental::not_fn

experimental::observer_ptr

experimental::make_array

experimental::to_array

experimental::ostream_joiner

experimental::gcd

experimental::lcm

experimental::source_location

experimental::randint

detection idiom

uniform container erasure

logical operator type traits

 

std::experimental::source_location

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;		(library fundamentals TS v2)

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

Possible output:

File: main.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)
C++ documentation for Filename and line information

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