127 lines
3.7 KiB
Markdown
127 lines
3.7 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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[](LICENSE)
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[](https://travis-ci.org/Neargye/nameof)
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[](https://ci.appveyor.com/project/Neargye/nameof/branch/master)
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[](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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[](https://wandbox.org/permlink/irgD3NwQM2ikhVMC)
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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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## Features
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* C++17
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* Header-only
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* Dependency-free
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* Compile-time
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* Name of variable, member variable
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* Name of type, variable type
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* Name of function, member function
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* Name of enum, enum variable
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* Name of macro
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* Enum to string
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## [Examples](example/example.cpp)
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* Nameof
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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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// Name of function.
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NAMEOF(foo<int, float>()) -> "foo"
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// Name of member function.
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NAMEOF(somevar.some_method()) -> "some_method"
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NAMEOF(somevar.some_method<int>()) -> "some_method"
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// Name of macro.
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NAMEOF(__LINE__) -> "__LINE__"
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NAMEOF(NAMEOF(structvar)) -> "NAMEOF"
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```
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* Nameof enum
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```cpp
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auto color = Color::RED;
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// Name of enum variable.
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NAMEOF_ENUM(color) -> "RED"
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nameof::nameof_enum(color) -> "RED"
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constexpr auto const_color = Color::BLUE;
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// Name of static storage enum variable.
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NAMEOF_CONST_ENUM(const_color) -> "BLUE"
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nameof::nameof_enum<const_color>() -> "BLUE"
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```
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* Nameof type
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```cpp
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using T = int;
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T var = 42;
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// Name of variable type.
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NAMEOF_VAR_TYPE(var) -> "int"
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nameof::nameof_type<decltype(var)>() -> "int"
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// Name of type.
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NAMEOF_TYPE(T) -> "int"
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nameof::nameof_type<T>() -> "int"
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```
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## Remarks
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* Nameof returns `std::string_view`. If argument does not have name, returns empty string.
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* Nameof expression argument are identified, but do not evaluated.
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* Enum variable must be in range `(-NAMEOF_ENUM_RANGE, NAMEOF_ENUM_RANGE)`. By default `NAMEOF_ENUM_RANGE = 128`. If you need a larger range, redefine the macro `NAMEOF_ENUM_RANGE`.
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```cpp
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#define NAMEOF_ENUM_RANGE 1028 // Redefine NAMEOF_ENUM_RANGE for larger range.
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#include <nameof.hpp>
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```
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* If you need name with template suffix, use NAMEOF_FULL.
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```cpp
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// Name of function.
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NAMEOF_FULL(foo<int, float>()) -> "foo<int, float>"
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// Name of member function.
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NAMEOF_FULL(somevar.some_method<int>()) -> "some_method<int>"
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```
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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(&some_class::some_method<int>) -> "&some_class::some_method<int>"
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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 (GCC >= 9 for NAMEOF_ENUM)
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## Licensed under the [MIT License](LICENSE)
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