nameof_module/doc/reference.md
2019-10-03 18:25:50 +05:00

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# Reference
* [`NAMEOF` macro that obtains simple (unqualified) string name of variable, function, macro.](#NAMEOF)
* [`NAMEOF_FULL` macro that obtains simple (unqualified) full (with template suffix) string name of variable, function, macro.](#NAMEOF_FULL)
* [`NAMEOF_RAW` macro that obtains raw string name of variable, function, macro.](#NAMEOF_RAW)
* [`nameof_enum(E value)` function that obtains simple (unqualified) string enum name of enum variable.](#nameof_enum(value))
* [`nameof_enum<auto V>()` function that obtains simple (unqualified) string enum name of static storage enum variable.](#nameof_enum<Value>())
* [`NAMEOF_ENUM` macro that obtains simple (unqualified) string enum name of enum variable.](#NAMEOF_ENUM)
* [`NAMEOF_CONST_ENUM` macro that obtains simple (unqualified) string enum name of static storage enum variable.](#NAMEOF_CONST_ENUM)
* [`nameof_type<T>()` function that obtains string name of type, reference and cv-qualifiers are ignored.](#nameof_type<T>())
* [`nameof_full_type<T>()` function that obtains string name of full type, with reference and cv-qualifiers.](#nameof_full_type<T>())
* [`NAMEOF_TYPE` macro that obtains string name of type, reference and cv-qualifiers are ignored.](#NAMEOF_TYPE)
* [`NAMEOF_FULL_TYPE` macro that obtains string name of full type, with reference and cv-qualifiers.](#NAMEOF_FULL_TYPE)
* [`NAMEOF_TYPE_EXPR` macro that obtains string name type of expression, reference and cv-qualifiers are ignored.](#NAMEOF_TYPE_EXPR)
* [`NAMEOF_FULL_TYPE_EXPR` macro that obtains string name full type of expression, with reference and cv-qualifiers.](#NAMEOF_FULL_TYPE_EXPR)
## `NAMEOF`
* Macro that obtains simple (unqualified) string name of variable, function, macro.
* Returns `nameof::cstring` - constexpr implementation of an string.
* If argument does not have name, occurs the compilation error `"Expression does not have a name."`.
* Examples
```cpp
// Name of variable.
NAMEOF(somevar) -> "somevar"
// Name of member variable.
NAMEOF(person.address.zip_code) -> "zip_code"
// Name of function.
NAMEOF(foo<int, float>()) -> "foo"
// Name of member function.
NAMEOF(somevar.some_method()) -> "some_method"
NAMEOF(somevar.some_method<int>()) -> "some_method"
// Name of macro.
NAMEOF(__LINE__) -> "__LINE__"
NAMEOF(NAMEOF(structvar)) -> "NAMEOF"
```
## `NAMEOF_FULL`
* Macro that obtains simple (unqualified) full (with template suffix) string name of variable, function, macro.
* Returns `nameof::cstring` - constexpr implementation of an string.
* If argument does not have name, occurs the compilation error `"Expression does not have a name."`.
* Examples
```cpp
// Full name of template function.
NAMEOF_FULL(foo<int, float>()) -> "foo<int, float>"
// Full name of template member function.
NAMEOF_FULL(somevar.some_method<int>()) -> "some_method<int>"
```
## `NAMEOF_RAW`
* Macro that obtains raw string name of variable, function, macro.
* Returns `nameof::cstring` - constexpr implementation of an string.
* If argument does not have name, occurs the compilation error `"Expression does not have a name."`.
* Examples
```cpp
NAMEOF_RAW(::somevar.somefield) -> "::somevar.somefield"
NAMEOF_RAW(&some_class::some_method<int>) -> "&some_class::some_method<int>"
```
## `nameof_enum(value)`
* Function that obtains simple (unqualified) string enum name of enum variable.
* Returns `std::string_view`.
* If argument does not have name, returns empty `std::string_view`.
* Examples
```cpp
auto color = Color::RED;
nameof::nameof_enum(color) -> "RED"
```
## `nameof_enum<Value>()`
* Function that obtains simple (unqualified) string enum name of static storage enum variable.
* Returns `std::string_view`.
* This version is much lighter on the compile times and is not restricted to the enum_range [limitation](limitations.md).
* If argument does not have name, returns empty `std::string_view`.
* Examples
```cpp
nameof::nameof_enum<Color::GREEN>() -> "GREEN"
```
## `NAMEOF_ENUM`
* Macro that obtains simple (unqualified) string enum name of enum variable.
* Returns `std::string_view`.
* If argument does not have name, returns empty `std::string_view`.
* Examples
```cpp
auto color = Color::RED;
NAMEOF_ENUM(color) -> "RED"
```
## `NAMEOF_CONST_ENUM`
* Macro macro that obtains simple (unqualified) string enum name of static storage enum variable.
* Returns `std::string_view`.
* This version is much lighter on the compile times and is not restricted to the enum_range [limitation](limitations.md).
* If argument does not have name, returns empty `std::string_view`.
* Examples
```cpp
NAMEOF_CONST_ENUM(Color::GREEN) -> "GREEN"
```
## `nameof_type<T>()`
* Function macro that obtains string name of type, reference and cv-qualifiers are ignored.
* Returns `nameof::cstring` - constexpr implementation of an string.
* In all cases, reference and cv-qualifiers are ignored by `nameof_type` (that is, `nameof_type<const T&>() == nameof_type<T>()`).
* Returns compiler-specific type name.
* If argument does not have name, occurs the compilation error `"Expression does not have a name."`.
* Examples
```cpp
using T = const int&;
nameof::nameof_type<T>() -> "int"
```
## `nameof_full_type<T>()`
* Function that obtains string name of full type, with reference and cv-qualifiers.
* Returns `nameof::cstring` - constexpr implementation of an string.
* Returns compiler-specific type name.
* If argument does not have name, occurs the compilation error `"Expression does not have a name."`.
* Examples
```cpp
using T = const int&;
nameof::nameof_full_type<T>() -> "const int&"
```
## `NAMEOF_TYPE`
* Macro macro that obtains string name of type, reference and cv-qualifiers are ignored.
* Returns `nameof::cstring` - constexpr implementation of an string.
* In all cases, reference and cv-qualifiers are ignored by `NAMEOF_TYPE` (that is, `NAMEOF_TYPE(const T&) == NAMEOF_TYPE(T)`).
* Returns compiler-specific type name.
* If argument does not have name, occurs the compilation error `"Expression does not have a name."`.
* Examples
```cpp
using T = const int&;
NAMEOF_TYPE(T) -> "int"
```
## `NAMEOF_FULL_TYPE`
* Macro that obtains string name of full type, with reference and cv-qualifiers.
* Returns `nameof::cstring` - constexpr implementation of an string.
* Returns compiler-specific type name.
* If argument does not have name, occurs the compilation error `"Expression does not have a name."`.
* Examples
```cpp
using T = const int&;
NAMEOF_TYPE(T) -> "const int&"
```
## `NAMEOF_TYPE_EXPR`
* Macro that obtains string name type of expression, reference and cv-qualifiers are ignored.
* Returns `nameof::cstring` - constexpr implementation of an string.
* Returns returns compiler-specific type name.
* In all cases, reference and cv-qualifiers are ignored.
* If argument does not have name, occurs the compilation error `"Expression does not have a name."`.
* Examples
```cpp
using T = const int&;
T var = 42;
NAMEOF_TYPE_EXPR(var) -> "int"
```
## `NAMEOF_TYPE_EXPR`
* Macro that obtains string name full type of expression, with reference and cv-qualifiers.
* Returns `nameof::cstring` - constexpr implementation of an string.
* Returns compiler-specific type name.
* If argument does not have name, occurs the compilation error `"Expression does not have a name."`.
* Examples
```cpp
using T = const int&;
T var = 42;
NAMEOF_FULL_TYPE_EXPR(var) -> "const int&"
```