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Trait class that identifies whether T is a copy constructible type.
A copy constructible type is a type that can be constructed from a value or reference of the same type. This includes scalar types and copy constructible classes.
A copy constructible class is a class that has a copy constructor (either its implicit constructor or a custom defined one).
The is_copy_constructible class inherits from integral_constant as being either true_type or false_type, depending on whether T is copy constructible.
Output:
Reference
C library:
- <cassert> (assert.h)
- <cctype> (ctype.h)
- <cerrno> (errno.h)
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<cfenv> (fenv.h)C++11
- <cfloat> (float.h)
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<cinttypes> (inttypes.h)C++11
- <ciso646> (iso646.h)
- <climits> (limits.h)
- <clocale> (locale.h)
- <cmath> (math.h)
- <csetjmp> (setjmp.h)
- <csignal> (signal.h)
- <cstdarg> (stdarg.h)
-
<cstdbool> (stdbool.h)C++11
- <cstddef> (stddef.h)
-
<cstdint> (stdint.h)C++11
- <cstdio> (stdio.h)
- <cstdlib> (stdlib.h)
- <cstring> (string.h)
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<ctgmath> (tgmath.h)C++11
- <ctime> (time.h)
-
<cuchar> (uchar.h)C++11
- <cwchar> (wchar.h)
- <cwctype> (wctype.h)
Containers:
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<array>C++11
- <deque>
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<forward_list>C++11
- <list>
- <map>
- <queue>
- <set>
- <stack>
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<unordered_map>C++11
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<unordered_set>C++11
- <vector>
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Input/Output:
Multi-threading:
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<atomic>C++11
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<condition_variable>C++11
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<future>C++11
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<mutex>C++11
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<thread>C++11
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Other:
- <algorithm>
- <bitset>
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<chrono>C++11
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<codecvt>C++11
- <complex>
- <exception>
- <functional>
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<initializer_list>C++11
- <iterator>
- <limits>
- <locale>
- <memory>
- <new>
- <numeric>
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<random>C++11
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<ratio>C++11
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<regex>C++11
- <stdexcept>
- <string>
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<system_error>C++11
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<tuple>C++11
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<type_traits>C++11
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<typeindex>C++11
- <typeinfo>
- <utility>
- <valarray>
<type_traits>
helper classes
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false_typeC++11
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integral_constantC++11
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true_typeC++11
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type traits
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alignment_ofC++11
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extentC++11
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has_virtual_destructorC++11
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is_abstractC++11
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is_arithmeticC++11
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is_arrayC++11
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is_assignableC++11
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is_base_ofC++11
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is_classC++11
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is_compoundC++11
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is_constC++11
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is_constructibleC++11
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is_convertibleC++11
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is_copy_assignableC++11
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is_copy_constructibleC++11
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is_default_constructibleC++11
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is_destructibleC++11
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is_emptyC++11
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is_enumC++11
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is_floating_pointC++11
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is_functionC++11
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is_fundamentalC++11
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is_integralC++11
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is_literal_typeC++11
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is_lvalue_referenceC++11
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is_member_function_pointerC++11
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is_member_object_pointerC++11
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is_member_pointerC++11
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is_move_assignableC++11
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is_move_constructibleC++11
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is_nothrow_assignableC++11
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is_nothrow_constructibleC++11
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is_nothrow_copy_assignableC++11
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is_nothrow_copy_constructibleC++11
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is_nothrow_default_constructibleC++11
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is_nothrow_destructibleC++11
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is_nothrow_move_assignableC++11
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is_nothrow_move_constructibleC++11
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is_null_pointerC++14
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is_objectC++11
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is_podC++11
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is_pointerC++11
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is_polymorphicC++11
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is_referenceC++11
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is_rvalue_referenceC++11
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is_sameC++11
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is_scalarC++11
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is_signedC++11
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is_standard_layoutC++11
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is_trivialC++11
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is_trivially_assignableC++11
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is_trivially_constructibleC++11
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is_trivially_copy_assignableC++11
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is_trivially_copy_constructibleC++11
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is_trivially_copyableC++11
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is_trivially_default_constructibleC++11
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is_trivially_destructibleC++11
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is_trivially_move_assignableC++11
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is_trivially_move_constructibleC++11
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is_unionC++11
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is_unsignedC++11
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is_voidC++11
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is_volatileC++11
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rankC++11
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type transformations
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add_constC++11
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add_cvC++11
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add_lvalue_referenceC++11
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add_pointerC++11
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add_rvalue_referenceC++11
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add_volatileC++11
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aligned_storageC++11
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aligned_unionC++11
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common_typeC++11
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conditionalC++11
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decayC++11
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enable_ifC++11
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make_signedC++11
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make_unsignedC++11
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remove_all_extentsC++11
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remove_constC++11
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remove_cvC++11
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remove_extentC++11
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remove_pointerC++11
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remove_referenceC++11
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remove_volatileC++11
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result_ofC++11
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underlying_typeC++11
-
- Reference
- <type_traits>
- is_copy_constructible
class template
<type_traits>
std::is_copy_constructible
template <class T> struct is_copy_constructible;
Is copy constructible
- integral_constant
- is_copy_constructible
Trait class that identifies whether T is a copy constructible type.
A copy constructible type is a type that can be constructed from a value or reference of the same type. This includes scalar types and copy constructible classes.
A copy constructible class is a class that has a copy constructor (either its implicit constructor or a custom defined one).
The is_copy_constructible class inherits from integral_constant as being either true_type or false_type, depending on whether T is copy constructible.
Template parameters
- T
- A complete type, or void (possible cv-qualified), or an array of unknown bound.
Member types
Inherited from integral_constant:| member type | definition |
|---|---|
| value_type | bool |
| type | either true_type or false_type |
Member constants
Inherited from integral_constant:| member constant | definition |
|---|---|
| value | either true or false |
Member functions
Inherited from integral_constant:- operator bool
- Returns value (public member function)
Example
|
|
Output:
is_copy_constructible: int: true A: true B: false C: true |
See also
- is_constructible
- Is constructible (class template)
- is_trivially_copy_constructible
- Is trivially copy constructible (class template)
- is_default_constructible
- Is default constructible (class template)
- is_destructible
- Is destructible (class template)
- is_nothrow_copy_constructible
- Is copy constructible throwing no exceptions (class template)
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