mapstructure is a reflection-based library for the bidirectional encoding and decoding of generic map data into native typed Go structures. It functions as a tool for transforming loosely typed map values into specific structs and encoding those structs back into maps.
The library utilizes Go reflection to map generic data keys to struct fields during runtime. It supports the transformation of untyped data from dynamic sources or configuration files into type-safe native structures.
The mapping process includes recursive traversal of nested maps and slices, as well as the use of struct tags to resolve custom destination names. It also provides capabilities for weakly-typed value coercion and custom type conversion via hook functions.