Light-weight and type-safe wrapper which serves a purpose of being able to select proper ut::new_arr* overload. More...

#include <ut0new.h>

Public Member Functions
	Count (size_t count)

size_t	operator() () const

Public Attributes
size_t	m_count

Detailed Description

Light-weight and type-safe wrapper which serves a purpose of being able to select proper ut::new_arr* overload.

Without having a separate overload with this type, creating an array of default-initialized instances of T through the ut::new_arr*(Args &&... args) overload would have been impossible because: int *ptr = ut::new_arr_withkey<int>(UT_NEW_THIS_FILE_PSI_KEY, 5); wouldn't even compile and int *ptr = ut::new_arr_withkey<int>(UT_NEW_THIS_FILE_PSI_KEY, std::forward_as_tuple(5)); would compile but would not have intended effect. It would create an array holding 1 integer element that is initialized to 5.

Given that function templates cannot be specialized, having an overload crafted specifically for given case solves the problem: int *ptr = ut::new_arr_withkey<int>(UT_NEW_THIS_FILE_PSI_KEY, ut::Count{5});

Constructor & Destructor Documentation

◆ Count()

ut::Count::Count ( size_t count )

inlineexplicit

Member Function Documentation

◆ operator()()

size_t ut::Count::operator() ( void ) const

inline

Member Data Documentation

◆ m_count

size_t ut::Count::m_count

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

storage/innobase/include/ut0new.h

Public Member Functions