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std::max_align_t

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C++
 
Utilities-Bibliothek
 
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Grundtypen
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Basic types
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Grundtypen
Feste Breite Integer-Typen (C++11)
ptrdiff_t
size_t
max_align_t(C++11)
Numerische Grenzen
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Numeric limits
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numeric_limits
C numerische begrenzt Schnittstelle
Laufzeit-Typinformationen
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Runtime type information
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Exterieur
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Type traits
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Primären Typ Kategorien
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Primary type categories
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is_void(C++11)
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)
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is_member_function_pointer(C++11)
Typ Eigenschaften
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Type properties
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is_const(C++11)
is_volatile(C++11)
is_pod(C++11)
is_empty(C++11)
is_polymorphic(C++11)
is_abstract(C++11)
Unterstützte Operationen
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Supported operations
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is_constructible
is_trivially_constructible
is_nothrow_constructible		(C++11)
(C++11)
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is_trivially_default_constructible
is_nothrow_default_constructible		(C++11)
(C++11)
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is_copy_constructible
is_trivially_copy_constructible
is_nothrow_copy_constructible		(C++11)
(C++11)
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is_move_constructible
is_trivially_move_constructible
is_nothrow_move_constructible		(C++11)
(C++11)
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is_assignable
is_trivially_assignable
is_nothrow_assignable		(C++11)
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is_copy_assignable
is_trivially_copy_assignable
is_nothrow_copy_assignable		(C++11)
(C++11)
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is_move_assignable
is_trivially_move_assignable
is_nothrow_move_assignable		(C++11)
(C++11)
(C++11)
is_destructible
is_trivially_destructible
is_nothrow_destructible		(C++11)
(C++11)
(C++11)
has_virtual_destructor(C++11)
Beziehungen und Eigentum Abfragen
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Relationships and property queries
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is_same(C++11)
is_base_of(C++11)
is_convertible(C++11)
alignment_of(C++11)
rank(C++11)
extent(C++11)
Typ Modifikationen
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Type modifications
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remove_cv
remove_const
remove_volatile		(C++11)
(C++11)
(C++11)
add_cv
add_const
add_volatile		(C++11)
(C++11)
(C++11)
make_signed(C++11)
make_unsigned(C++11)
Typ Transformationen
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Type transformations
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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)
Typ-Trait-Konstanten
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Type trait constants
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integral_constant(C++11)
 
definiert in Header <cstddef>
typedef /*implementation-defined*/ max_align_t;
 (seit C++11)
std::max_align_t ist ein POD-Typ, deren Ausrichtung Voraussetzung ist mindestens so streng sind (so groß) wie jeder skalaren Typ .
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std::max_align_t is a POD type whose alignment requirement is at least as strict (as large) as that of every scalar type.
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[Bearbeiten] Notes

Pointers wieder durch Zuweisung Funktionen wie std::malloc in geeigneter Weise für jedes Objekt ausgerichtet, was bedeutet, dass sie mindestens so streng wie std::max_align_t ausgerichtet sind .
Original:
Pointers returned by allocation functions such as std::malloc are suitably aligned for any object, which means they are aligned at least as strict as std::max_align_t.
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std::max_align_t ist in der Regel gleichbedeutend mit dem größten skalaren Typs, die long double ist auf den meisten Plattformen und seine Ausrichtung Voraussetzung ist entweder 8 oder 16 .
Original:
std::max_align_t is usually synonymous with the largest scalar type, which is long double on most platforms, and its alignment requirement is either 8 or 16.
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[Bearbeiten] Beispiel

#include <iostream>
#include <cstddef>
int main()
{
    std::cout << alignof(std::max_align_t) << '\n';
}

Output: 

16

[Bearbeiten] Siehe auch

alignof operator queries alignment requirements of a type (seit C++11) [edit]
(C++11)
Ruft den Type der Alignment-Anforderungen
Original:
obtains the type's alignment requirements
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(Klassen-Template) [edit]
(C++11)
prüft, ob ein Typ ist skalaren Typ
Original:
checks if a type is scalar type
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(Klassen-Template) [edit]
Von „https://de.cppreference.com/mwiki/index.php?title=cpp/types/max_align_t&oldid=30264“