Fixed width integer types (since C++11)

 

C++

Language

Standard library headers

Concepts

Utilities library

Strings library

Containers library

Algorithms library

Iterators library

Numerics library

Input/output library

Localizations library

Regular expressions library (C++11)

Atomic operations library (C++11)

Thread support library (C++11)

 

Utilities library

Type support (basic types, RTTI, type traits)

Dynamic memory management

Error handling

Program utilities

Variadic functions

Date and time

Function objects

initializer_list (C++11)

bitset

hash (C++11)

Relational operators

rel_ops::operator!=rel_ops::operator>rel_ops::operator<=rel_ops::operator>=

Pairs and tuples

pair

tuple (C++11)

piecewise_construct_t (C++11)

piecewise_construct (C++11)

Swap, forward and move

swap

forward (C++11)

move (C++11)

move_if_noexcept (C++11)

declval (C++11)

 

Type support

Basic types
Fundamental types
Fixed width integer types (C++11)
ptrdiff_t size_t max_align_t (C++11)	nullptr_t (C++11) offsetof NULL
Numeric limits
numeric_limits
C numeric limits interface
Runtime type information
type_info type_index (C++11)	bad_typeid bad_cast
Type traits
Primary type categories
is_void (C++11) is_null_pointer (C++14) is_array (C++11) is_pointer (C++11) is_enum (C++11) is_union (C++11) is_class (C++11) is_function (C++11)	is_object (C++11) is_scalar (C++11) is_compound (C++11) is_integral (C++11) is_floating_point (C++11) is_fundamental (C++11) is_arithmetic (C++11)
is_reference (C++11)
is_lvalue_reference (C++11)
is_rvalue_reference (C++11)
is_member_pointer (C++11)
is_member_object_pointer (C++11)
is_member_function_pointer (C++11)

Type properties
is_const (C++11) is_volatile (C++11) is_pod (C++11) is_empty (C++11) is_polymorphic (C++11) is_final (C++14) is_abstract (C++11)	is_trivial (C++11) is_trivially_copyable (C++11) is_standard_layout (C++11) is_literal_type (C++11) is_signed (C++11) is_unsigned (C++11)

Supported operations
is_constructibleis_trivially_constructibleis_nothrow_constructible (C++11)(C++11)(C++11)
is_default_constructibleis_trivially_default_constructibleis_nothrow_default_constructible (C++11)(C++11)(C++11)
is_copy_constructibleis_trivially_copy_constructibleis_nothrow_copy_constructible (C++11)(C++11)(C++11)
is_move_constructibleis_trivially_move_constructibleis_nothrow_move_constructible (C++11)(C++11)(C++11)
is_assignableis_trivially_assignableis_nothrow_assignable (C++11)(C++11)(C++11)
is_copy_assignableis_trivially_copy_assignableis_nothrow_copy_assignable (C++11)(C++11)(C++11)
is_move_assignableis_trivially_move_assignableis_nothrow_move_assignable (C++11)(C++11)(C++11)
is_destructibleis_trivially_destructibleis_nothrow_destructible (C++11)(C++11)(C++11)
has_virtual_destructor (C++11)
Relationships and property queries
is_same (C++11) is_base_of (C++11) is_convertible (C++11)	alignment_of (C++11) rank (C++11) extent (C++11)
Type modifications
remove_cvremove_constremove_volatile (C++11)(C++11)(C++11) add_cvadd_constadd_volatile (C++11)(C++11)(C++11) make_signed (C++11) make_unsigned (C++11)	remove_reference (C++11) add_lvalue_referenceadd_rvalue_reference (C++11)(C++11) remove_pointer (C++11) add_pointer (C++11) remove_extent (C++11) remove_all_extents (C++11)
Type transformations
aligned_storage (C++11) aligned_union (C++11) decay (C++11) enable_if (C++11)	conditional (C++11) common_type (C++11) underlying_type (C++11) result_of (C++11)
Type trait constants
integral_constant (C++11)

 

Types

Defined in header <cstdint>
int8_t int16_t int32_t int64_t	signed integer type with width of exactly 8, 16, 32 and 64 bits respectively with no padding bits and using 2's complement for negative values (provided only if the implementation directly supports the type)
int_fast8_t int_fast16_t int_fast32_t int_fast64_t	fastest signed integer type with width of at least 8, 16, 32 and 64 bits respectively
int_least8_t int_least16_t int_least32_t int_least64_t	smallest signed integer type with width of at least 8, 16, 32 and 64 bits respectively
intmax_t	maximum width integer type
intptr_t	integer type capable of holding a pointer
uint8_t uint16_t uint32_t uint64_t	unsigned integer type with width of exactly 8, 16, 32 and 64 bits respectively (provided only if the implementation directly supports the type)
uint_fast8_t uint_fast16_t uint_fast32_t uint_fast64_t	fastest unsigned integer type with width of at least 8, 16, 32 and 64 bits respectively
uint_least8_t uint_least16_t uint_least32_t uint_least64_t	smallest unsigned integer type with width of at least 8, 16, 32 and 64 bits respectively
uintmax_t	maximum width unsigned integer type
uintptr_t	unsigned integer type capable of holding a pointer

Macro constants

Defined in header <cstdint>
Signed integers : minimum value
INT8_MIN INT16_MIN INT32_MIN INT64_MIN	minimum value of an object of type int8_t, int16_t, int32_t, int64_t (macro constant)
INT_FAST8_MIN INT_FAST16_MIN INT_FAST32_MIN INT_FAST64_MIN	minimum value of an object of type int_fast8_t, int_fast16_t, int_fast32_t, int_fast64_t (macro constant)
INT_LEAST8_MIN INT_LEAST16_MIN INT_LEAST32_MIN INT_LEAST64_MIN	minimum value of an object of type int_least8_t, int_least16_t, int_least32_t, int_least64_t (macro constant)
INTPTR_MIN	minimum value of an object of type intptr_t (macro constant)
INTMAX_MIN	minimum value of an object of type intmax_t (macro constant)
Signed integers : maximum value
INT8_MAX INT16_MAX INT32_MAX INT64_MAX	maximum value of an object of type int8_t, int16_t, int32_t, int64_t (macro constant)
INT_FAST8_MAX INT_FAST16_MAX INT_FAST32_MAX INT_FAST64_MAX	maximum value of an object of type int_fast8_t, int_fast16_t, int_fast32_t, int_fast64_t (macro constant)
INT_LEAST8_MAX INT_LEAST16_MAX INT_LEAST32_MAX INT_LEAST64_MAX	maximum value of an object of type int_least8_t, int_least16_t, int_least32_t, int_least64_t (macro constant)
INTPTR_MAX	maximum value of an object of type intptr_t (macro constant)
INTMAX_MAX	maximum value of an object of type intmax_t (macro constant)
Unsigned integers : maximum value
UINT8_MAX UINT16_MAX UINT32_MAX UINT64_MAX	maximum value of an object of type uint8_t, uint16_t, uint32_t, uint64_t (macro constant)
UINT_FAST8_MAX UINT_FAST16_MAX UINT_FAST32_MAX UINT_FAST64_MAX	maximum value of an object of type uint_fast8_t, uint_fast16_t, uint_fast32_t, uint_fast64_t (macro constant)
UINT_LEAST8_MAX UINT_LEAST16_MAX UINT_LEAST32_MAX UINT_LEAST64_MAX	maximum value of an object of type uint_least8_t, uint_least16_t, uint_least32_t, uint_least64_t (macro constant)
UINTPTR_MAX	maximum value of an object of type uintptr_t (macro constant)
UINTMAX_MAX	maximum value of an object of type uintmax_t (macro constant)
Limits of other integer types
PTRDIFF_MIN	minimum value of object of std::ptrdiff_t type (macro constant)
PTRDIFF_MAX	maximum value of object of std::ptrdiff_t type (macro constant)
SIZE_MAX	maximum value of object of std::size_t type (macro constant)
SIG_ATOMIC_MIN	minimum value of object of std::sig_atomic_t type (macro constant)
SIG_ATOMIC_MAX	maximum value of object of std::sig_atomic_t type (macro constant)
WCHAR_MIN	minimum value of object of wchar_t type (macro constant)
WCHAR_MAX	maximum value of object of wchar_t type (macro constant)
WINT_MIN	minimum value of object of std::wint_t type (macro constant)
WINT_MAX	maximum value of object of std::wint_t type (macro constant)

Function macros for minimum-width integer constants

INT8_C INT16_C INT32_C INT64_C	expands to an integer literal having the value specified by its argument and the type int_least8_t, int_least16_t, int_least32_t, int_least64_t respectively (function macro)
INTMAX_C	expands to an integer literal having the value specified by its argument and the type intmax_t (function macro)
UINT8_C UINT16_C UINT32_C UINT64_C	expands to an integer literal having the value specified by its argument and the type uint_least8_t, uint_least16_t, uint_least32_t, uint_least64_t respectively (function macro)
UINTMAX_C	expands to an integer literal having the value specified by its argument and the type uintmax_t (function macro)

#include <cstdint>
UINT64_C(0x123) // expands to 0x123ULL

Format macro constants

Defined in header <cinttypes>

Format constants for the std::fprintf family of functions

Equivalent for int or unsigned int	Description	Macros for data types
		std::intx_t	std::int_leastx_t	std::int_fastx_t	std::intmax_t	std::intptr_t
		x = 8, 16, 32 or 64
%d	output of a signed decimal integer value	PRIdx	PRIdLEASTx	PRIdFASTx	PRIdMAX	PRIdPTR
%i		PRIix	PRIiLEASTx	PRIiFASTx	PRIiMAX	PRIiPTR
%u	output of an unsigned decimal integer value	PRIux	PRIuLEASTx	PRIuFASTx	PRIuMAX	PRIuPTR
%o	output of an unsigned octal integer value	PRIox	PRIoLEASTx	PRIoFASTx	PRIoMAX	PRIoPTR
%x	output of an unsigned lowercase hexadecimal integer value	PRIxx	PRIxLEASTx	PRIxFASTx	PRIxMAX	PRIxPTR
%X	output of an unsigned uppercase hexadecimal integer value	PRIXx	PRIXLEASTx	PRIXFASTx	PRIXMAX	PRIXPTR

Format constants for the std::fscanf family of functions

Equivalent for int or unsigned int	Description	Macros for data types
		std::intx_t	std::int_leastx_t	std::int_fastx_t	std::intmax_t	std::intptr_t
		x = 8, 16, 32 or 64
%d	input of a signed decimal integer value	SCNdx	SCNdLEASTx	SCNdFASTx	SCNdMAX	SCNdPTR
%i		SCNix	SCNiLEASTx	SCNiFASTx	SCNiMAX	SCNiPTR
%u	input of an unsigned decimal integer value	SCNux	SCNuLEASTx	SCNuFASTx	SCNuMAX	SCNuPTR
%o	input of an unsigned octal integer value	SCNox	SCNoLEASTx	SCNoFASTx	SCNoMAX	SCNoPTR
%x	input of an unsigned lowercase hexadecimal integer value	SCNxx	SCNxLEASTx	SCNxFASTx	SCNxMAX	SCNxPTR
%X	input of an unsigned uppercase hexadecimal integer value	SCNXx	SCNXLEASTx	SCNXFASTx	SCNXMAX	SCNXPTR