== `sqlite/allocator.hpp`
[#allocator]

The sqlite allocator wraps sqlite's malloc & free functions in a similar way that std::allocator wraps `new`/`delete`.

This can be used for sqlite-related code (e.g. vtables or custom functions) that should use memory from the sqlite3 pool.

[source,cpp,subs=+quotes]
----
template<typename T>
struct allocator
{
  constexpr allocator() noexcept {}
  constexpr allocator( const allocator& other ) noexcept {}
  template< class U >
  constexpr allocator( const allocator<U>& other ) noexcept {}

  constexpr static std::size_t alignment = __implementation_defined__;


  static_assert(alignof(T) <= alignment, "T alignment can't be fulfilled by sqlite");

  [[nodiscard]] T* allocate( std::size_t n ); // <1>
  void deallocate( T* p, std::size_t); // <2>
};
----
<1> Invokes `sqlite3_malloc64` and throws `std::bad_alloc` if it fails.
<2> Invokes `sqlite3_free`

NOTE: Sqlite provides extensive https://www.sqlite.org/malloc.html[customizability for its dynamic memory allocation].