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source_location::function_name |
constexprconstchar* function_name()constnoexcept; | (since C++20) | |
Returns the name of the function associated with the position represented by this object, if any.
Contents |
(none)
If this object represents a position in a body of a function, returns an implementation-defined null-terminated byte string corresponding to the name of the function.
Otherwise, an empty string is returned.
std::source_location::function_name may help to obtain the names of functions (including the special functions) alongside with their signatures.
#include <cstdio>#include <utility>#include <source_location> inlinevoid print_function_name(conststd::source_location& location= std::source_location::current()){std::puts(location.function_name());// prints the name of the caller} void foo(double&&){ print_function_name();} namespace bar{void baz(){ print_function_name();}} template<typename T>auto pub(T){ print_function_name();return42;} struct S{ S(){ print_function_name();} S(int){ print_function_name();} ~S(){ print_function_name();} S& operator=(Sconst&){ print_function_name();return*this;} S& operator=(S&&){ print_function_name();return*this;}}; int main(int,charconst*const[]){ print_function_name(); foo(3.14); bar::baz(); pub(0xFULL); S p; S q{42}; p= q; p= std::move(q);[]{ print_function_name();}();}
Possible output:
int main(int, const char* const*)void foo(double&&)void bar::baz()auto pub(T) [with T = long long unsigned int]S::S()S::S(int)S& S::operator=(const S&)S& S::operator=(S&&)main(int, const char* const*)::<lambda()>S::~S()S::~S()
| 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 file name represented by this object (public member function)[edit] |
