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Guile Reference Manual

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22.5.1 Structure Concepts

A structure object consists of a handle, structure data, and a vtable. The handle is a Scheme value which points to both the vtable and the structure's data. Structure data is a dynamically allocated region of memory, private to the structure, divided up into typed fields. A vtable is another structure used to hold type-specific data. Multiple structures can share a common vtable.

Three concepts are key to understanding structures.

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