Mem_root_array< Element_type, has_trivial_destructor > Class Template Reference

#include <mem_root_array.h>

Public Member Functions
	Mem_root_array (MEM_ROOT *root)
Element_type &	at (size_t n)
const Element_type &	at (size_t n) const
Element_type *	begin ()
Element_type *	end ()
void	clear ()
void	chop (const size_t pos)
bool	reserve (size_t n)
bool	push_back (const Element_type &element)
size_t	capacity () const
size_t	element_size () const
bool	empty () const
size_t	size () const

Detailed Description

template<typename Element_type, bool has_trivial_destructor>
class Mem_root_array< Element_type, has_trivial_destructor >

A typesafe replacement for DYNAMIC_ARRAY. We use MEM_ROOT for allocating storage, rather than the C++ heap. The interface is chosen to be similar to std::vector.

Remarks

Unlike DYNAMIC_ARRAY, elements are properly copied (rather than memcpy()d) if the underlying array needs to be expanded.

Depending on has_trivial_destructor, we destroy objects which are removed from the array (including when the array object itself is destroyed).

Note that MEM_ROOT has no facility for reusing free space, so don't use this if multiple re-expansions are likely to happen.

Parameters

Element_type	The type of the elements of the container. Elements must be copyable.
has_trivial_destructor	If true, we don't destroy elements. We could have used type traits to determine this. __has_trivial_destructor is supported by some (but not all) compilers we use.

Definition at line 47 of file mem_root_array.h.

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

• sql/mem_root_array.h