Nameof C++

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Branch	Linux/OSX	Windows	License	Codacy
master

What is Nameof?

Header-only C++17 library provides nameof macros and functions to obtain simple name of variable, type, function, macro, and enum.

Features

• C++17
• Header-only
• Dependency-free
• Compile-time
• Name of variable, member variable
• Name of type, variable type
• Name of function, member function
• Name of enum, enum variable
• Name of macro
• Enum to string

Examples

• Name of variable

// Name of variable
NAMEOF(somevar) -> "somevar"
// Name of member variable
NAMEOF(person.address.zip_code) -> "zip_code"

constexpr auto cx_name = NAMEOF(somevar);
static_assert("somevar" == cx_name);

• Name of function

// Name of function
NAMEOF(some_method<int, float>) -> "some_method"
NAMEOF_FULL(some_method<int, float>) -> "some_method<int, float>"
// Name of member function
NAMEOF(somevar.foo()) -> "foo"
NAMEOF_FULL(somevar.boo<int>()) -> "boo<int>"

constexpr auto cx_name = NAMEOF(somevar.foo());
static_assert("foo" == cx_name);

• Name of enum

auto c = Color::RED;
// Name of enum variable
NAMEOF_ENUM(c) -> "RED"
// Name of enum variable
nameof::nameof_enum(c) -> "RED"

constexpr auto cx_color = Color::BLUE;
// Name of static storage enum variable
nameof::nameof_enum<cx_color>() -> "BLUE"

• Name of type

// Name of variable type
NAMEOF_TYPE(Color::RED) -> "Color"
// Name of type
NAMEOF_TYPE_T(int) -> "int"
// Name of variable type
nameof::nameof_type<decltype(Color::RED)>() -> "Color"
// Name of type
nameof::nameof_type<int>() -> "int"

constexpr auto cx_name = NAMEOF_TYPE(Color::RED);
static_assert("Color" == cx_name);

• Name of macro

// Name of macro
NAMEOF(__LINE__) -> "__LINE__"

constexpr auto cx_name = NAMEOF(__LINE__);
static_assert("__LINE__" == cx_name);

Remarks

• Nameof return std::string_view.

• Nameof expression arguments are identified, but do not evaluated.

• NAMEOF_ENUM supported on the GCC >= 9.

• If you need of raw fully-qualified name, use NAMEOF_RAW.

NAMEOF_RAW(somevar.somefield) -> "somevar.somefield"
NAMEOF_RAW(&SomeStruct::SomeMethod) -> "&SomeStruct::SomeMethod"
NAMEOF_RAW(std::string) -> "std::string"

• Spaces and Tabs ignored

NAMEOF(   somevar   ) -> "somevar"
NAMEOF(	somevar	) -> "somevar"

Integration

You have to add required file nameof.hpp.

Compiler compatibility

• Clang/LLVM >= 5
• Visual C++ >= 15.3 / Visual Studio >= 2017
• Xcode >= 9
• GCC >= 7

Licensed under the MIT License