toolbox::traits::detail::storage_traits< T > Struct Template Reference

类型存储特征/Storage traits for types More...

#include <type_traits.hpp>

Static Public Attributes
static constexpr bool	may_be_heap_allocated
static constexpr bool	must_be_heap_allocated
static constexpr bool	may_be_stack_allocated

Detailed Description

template<typename T>
struct toolbox::traits::detail::storage_traits< T >

类型存储特征/Storage traits for types

Template Parameters

T	要分析的类型/Type to analyze

提供类型的存储特征信息/Provides information about storage characteristics of a type:

• 是否可以堆分配/Whether it may be heap allocated
• 是否必须堆分配/Whether it must be heap allocated
• 是否可以栈分配/Whether it may be stack allocated

class MyClass {};
class Abstract { virtual void foo() = 0; };
 
// 检查普通类/Check regular class
static_assert(storage_traits<MyClass>::may_be_stack_allocated);
static_assert(!storage_traits<MyClass>::must_be_heap_allocated);
 
// 检查抽象类/Check abstract class
static_assert(storage_traits<Abstract>::must_be_heap_allocated);
static_assert(!storage_traits<Abstract>::may_be_stack_allocated);

Member Data Documentation

may_be_heap_allocated

template<typename T >

constexpr bool toolbox::traits::detail::storage_traits< T >::may_be_heap_allocated

staticconstexpr

Initial value:

= !std::is_array_v<T>
      && (sizeof(T) > 1024
          ||  
          std::has_virtual_destructor_v<T>
          ||  
              
          std::is_polymorphic_v<T>)

may_be_stack_allocated

template<typename T >

constexpr bool toolbox::traits::detail::storage_traits< T >::may_be_stack_allocated

staticconstexpr

Initial value:

=
      !must_be_heap_allocated && std::is_object_v<T> && !std::is_abstract_v<T>

must_be_heap_allocated

template<typename T >

constexpr bool toolbox::traits::detail::storage_traits< T >::must_be_heap_allocated

staticconstexpr

Initial value:

=
      std::is_abstract_v<T>

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The documentation for this struct was generated from the following file:

• src/include/cpp-toolbox/type_traits.hpp