Rust values vs places: the mental model that makes ownership click

Abhishekcur · x · 2026-09-04

Separate two questions: what kind of expression is this, and how is the surrounding code using it?
A value is an instance of a type (e.g. 42, a particular String); a place expression identifies storage that can contain a value; most other expressions are value expressions, plus a small assignee-expression category used left of assignment.
When a place is used in a value context, Rust obtains the stored value: Copy types are copied, non-Copy types may be moved.
A move transfers ownership but doesn't promise bytes physically change addresses — the compiler may copy a small representation, optimize it away, or use another equivalent implementation.

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