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#  Metaprogramming library  (since C++11)

From cppreference.com

< [ cpp ](/w/cpp "cpp")

[ C++ ](/w/cpp "cpp")

[ Compiler support ](/w/cpp/compiler_support "cpp/compiler support")  
---  
[ Freestanding and hosted ](/w/cpp/freestanding "cpp/freestanding")  
[ Language ](/w/cpp/language "cpp/language")  
[ Standard library ](/w/cpp/standard_library "cpp/standard library")  
[ Standard library headers ](/w/cpp/header "cpp/header")  
[ Named requirements ](/w/cpp/named_req "cpp/named req")  
[ Feature test macros ](/w/cpp/feature_test "cpp/feature test") (C++20)  
[ Language support library ](/w/cpp/utility#Language_support "cpp/utility")  
[ Concepts library ](/w/cpp/concepts "cpp/concepts") (C++20)  
**Metaprogramming library** (C++11)  
[ Diagnostics library ](/w/cpp/error "cpp/error")  
[ General utilities library ](/w/cpp/utility "cpp/utility")  
[ Strings library ](/w/cpp/string "cpp/string")  
[ Containers library ](/w/cpp/container "cpp/container")  
[ Iterators library ](/w/cpp/iterator "cpp/iterator")  
[ Ranges library ](/w/cpp/ranges "cpp/ranges") (C++20)  
[ Algorithms library ](/w/cpp/algorithm "cpp/algorithm")  
[ Numerics library ](/w/cpp/numeric "cpp/numeric")  
[ Localizations library ](/w/cpp/locale "cpp/locale")  
[ Input/output library ](/w/cpp/io "cpp/io")  
[ Filesystem library ](/w/cpp/filesystem "cpp/filesystem") (C++17)  
[ Regular expressions library ](/w/cpp/regex "cpp/regex") (C++11)  
[ Concurrency support library ](/w/cpp/thread "cpp/thread") (C++11)  
[ Technical specifications ](/w/cpp/experimental "cpp/experimental")  
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**Metaprogramming library**

Type traits  
---  
|  Type categories  
---  
|  [ is_void  ](/w/cpp/types/is_void "cpp/types/is void") (C++11)  
---  
[ is_null_pointer  ](/w/cpp/types/is_null_pointer "cpp/types/is null pointer")
(C++14)  
[ is_array  ](/w/cpp/types/is_array "cpp/types/is array") (C++11)  
[ is_pointer  ](/w/cpp/types/is_pointer "cpp/types/is pointer") (C++11)  
[ is_enum  ](/w/cpp/types/is_enum "cpp/types/is enum") (C++11)  
[ is_union  ](/w/cpp/types/is_union "cpp/types/is union") (C++11)  
[ is_class  ](/w/cpp/types/is_class "cpp/types/is class") (C++11)  
[ is_function  ](/w/cpp/types/is_function "cpp/types/is function") (C++11)  
  
|  [ is_object  ](/w/cpp/types/is_object "cpp/types/is object") (C++11)  
---  
[ is_scalar  ](/w/cpp/types/is_scalar "cpp/types/is scalar") (C++11)  
[ is_compound  ](/w/cpp/types/is_compound "cpp/types/is compound") (C++11)  
[ is_integral  ](/w/cpp/types/is_integral "cpp/types/is integral") (C++11)  
[ is_floating_point  ](/w/cpp/types/is_floating_point "cpp/types/is floating
point") (C++11)  
[ is_fundamental  ](/w/cpp/types/is_fundamental "cpp/types/is fundamental")
(C++11)  
[ is_arithmetic  ](/w/cpp/types/is_arithmetic "cpp/types/is arithmetic")
(C++11)  
  
[ is_reference  ](/w/cpp/types/is_reference "cpp/types/is reference") (C++11)  
[ is_lvalue_reference  ](/w/cpp/types/is_lvalue_reference "cpp/types/is lvalue
reference") (C++11)  
[ is_rvalue_reference  ](/w/cpp/types/is_rvalue_reference "cpp/types/is rvalue
reference") (C++11)