C++ Support

Currently, CLion supports all the C++ standards up to C++14 and partially the C++17.
The table below represents the list of features supported by CLion for the respective standards.
Legend:
- Supported.
- Not supported.

C++17	Status
Nested namespace definition
fold-expressions
Class template deduction
auto non-type parameters
UTF-8 character literals
__has_include
Lambda capture of *this
[[nodiscard]] attribute
[[fallthrough]] attribute
[[maybe_unused]] attribute
Made noexcept as a part of the function type
One-argument static assert
if constexpr
Initializers in if and switch statements
Inline variables
New rules for auto deduction from braced-init-list

C++14
Variable templates
Generic lambdas
Binary literals
Aggregate initialization for classes with brace-or-equal initializers
[[deprecated]] attribute
Single quote as digit separator
Return type deduction for normal functions
Generalized lambda capture
constexpr specifier

C++11
auto specifier
decltype specifier
final specifier
override specifier
Trailing return initialization
rvalue references
Variadic templates
List initialization
In-class member initializers
Delegating constructors
Inheriting constructors
nullptr
long long
char16_t and char32_t
Generalized unions
Generalized POD's
thread_local storage
GC interface
range for
Static asserts
Explicit specifier
default/ delete keywords
Scoped enum
thread_local keyword
noexcept specifier
noexcept operator
Inline namespaces
alignof / alignas specifiers
extern template
attribute specifier sequence
Lambda functions
Raw string literals
Type aliases
Type traits
User-defined literals
constexpr specifier

You can enable the desired C++ standard using CMake CMAKE_CXX_STANDARD variable. For example:

CLion is compatible with libc++ (Clang) and libstdc++ (GCC) Standard Template Libraries (STL).