129 lines
3.6 KiB
Markdown
129 lines
3.6 KiB
Markdown
# Nameof C++
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```text
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_ _ __ _____
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| \ | | / _| / ____|_ _
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| \| | __ _ _ __ ___ ___ ___ | |_ | | _| |_ _| |_
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| . ` |/ _` | '_ ` _ \ / _ \/ _ \| _| | | |_ _|_ _|
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| |\ | (_| | | | | | | __/ (_) | | | |____|_| |_|
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|_| \_|\__,_|_| |_| |_|\___|\___/|_| \_____|
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```
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Branch | Linux/OSX | Windows | License | Codacy
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-------|-----------|---------|---------|-------
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master |[](https://travis-ci.org/Neargye/nameof)|[](https://ci.appveyor.com/project/Neargye/nameof/branch/master)|[](LICENSE)|[](https://www.codacy.com/app/Neargye/nameof?utm_source=github.com&utm_medium=referral&utm_content=Neargye/nameof&utm_campaign=Badge_Grade)
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## What is Nameof?
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Header-only C++17 library provides nameof macros and functions to obtain simple name of variable, type, function, macro, and enum.
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Before, you had to use string literals to refer to definitions, which is brittle when renaming code elements because tools do not know to check these string literals.
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## Features
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* C++17
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* Simple syntax.
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* Header-only
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* Dependency-free
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* Compile-time
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## [Examples](example/example.cpp)
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* Name of variable
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```cpp
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// Name of variable
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NAMEOF(somevar) -> "somevar"
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// Name of member variable
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NAMEOF(person.address.zip_code) -> "zip_code"
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constexpr auto cx_name = NAMEOF(somevar);
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static_assert("somevar" == cx_name);
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```
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* Name of function
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```cpp
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// Name of function
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NAMEOF(some_method<int, float>) -> "some_method"
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NAMEOF_FULL(some_method<int, float>) -> "some_method<int, float>"
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// Name of member function
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NAMEOF(somevar.foo() -> "foo"
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NAMEOF_FULL(somevar.boo<int>() -> "boo<int>"
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constexpr auto cx_name = NAMEOF(somevar.foo());
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static_assert("foo" == cx_name);
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```
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* Name of enum
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```cpp
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// Name of enum
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auto c = Color::RED;
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NAMEOF_ENUM(c) -> "RED"
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// Name of enum
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nameof::nameof_enum(c) -> "RED"
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constexpr auto cx_name = NAMEOF_ENUM(c);
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static_assert("RED" == cx_name);
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```
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* Name of type
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```cpp
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// Name of variable type
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NAMEOF_TYPE(Color::RED) -> "Color"
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// Name of type
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NAMEOF_TYPE_T(int) -> "int"
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// Name of variable type
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nameof::nameof_type<decltype(Color::RED)>() -> "Color"
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// Name of type
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nameof::nameof_type<int>() -> "int"
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constexpr auto cx_name = NAMEOF_TYPE(Color::RED);
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static_assert("Color" == cx_name);
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```
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* Name of macro
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```cpp
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// Name of macro
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NAMEOF(__LINE__) -> "__LINE__"
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constexpr auto cx_name = NAMEOF(__LINE__);
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static_assert("__LINE__" == cx_name);
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```
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## Remarks
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* Nameof return std::string_view.
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* The argument expression identifies code definition, but it is never evaluated.
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* If you need raw fully-qualified name, use NAMEOF_RAW.
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```cpp
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NAMEOF_RAW(somevar.somefield) -> "somevar.somefield"
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NAMEOF_RAW(&SomeStruct::SomeMethod) -> "&SomeStruct::SomeMethod"
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NAMEOF_RAW(std::string) -> "std::string"
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```
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* NAMEOF_ENUM does not work on the GCC.
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```cpp
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auto c = Color::RED;
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NAMEOF_ENUM(c) -> "(Color)0"
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nameof::nameof_enum(c) -> "(Color)0"
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```
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* Spaces and Tabs ignored
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```cpp
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NAMEOF( somevar ) -> "somevar"
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NAMEOF( somevar ) -> "somevar"
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```
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## Integration
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You should add required file [nameof.hpp](include/nameof.hpp).
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## Compiler compatibility
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* Clang/LLVM >= 5
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* Visual C++ >= 15.3 / Visual Studio >= 2017
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* Xcode >= 9
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* GCC >= 7
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## Licensed under the [MIT License](LICENSE)
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