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Destructing statements that start off as declarations can end up becoming reassignments if the variable is a scope declaration, so we have existing logic to handle cases where some parts of a destructure need to be converted into new locals, with a reassignment to the hoisted scope variable afterwards. However, there is an edge case where all of the values are reassigned, in which case we don't need to rewrite and can just set the instruction kind to reassign.
React Compiler
React Compiler is a compiler that optimizes React applications, ensuring that only the minimal parts of components and hooks will re-render when state changes. The compiler also validates that components and hooks follow the Rules of React.
More information about the design and architecture of the compiler are covered in the Design Goals.
More information about developing the compiler itself is covered in the Development Guide.