Can a Custom Allocator Mimic STL Vector Behavior with Stack-Based Memory?

Seeking a Stack-Based C STL Equivalent Vector Class

While attempting to craft a custom container class for storing data in a stack-allocated array, let's explore an alternative solution that maintains compatibility with STL vector functionality.

By leveraging a custom allocator class, we can modify STL containers like vector to utilize stack-based memory. Chromium's stack_container.h provides a specialized allocator for this purpose called StackAllocator.

To utilize this allocator, instantiate it and pass it as the second parameter to your STL container's constructor:

<code class="cpp">static const size_t buffer_size = 128;
typedef std::pair<const char*, const char*> item;
typedef StackAllocator<item, buffer_size> Allocator;
typedef std::vector<item, Allocator> VectorType;

Allocator stack_buffer;
VectorType vector(stack_buffer);
vector.reserve(buffer_size);</code>

This approach avoids the need for writing a new container class while preserving the convenience of using the familiar STL vector interface. Additionally, the underlying data is stored on the stack, ensuring efficient memory management.

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