Module map_query 

Uncompiled reactive map operation chains.

A MapQuery is a recipe for a reactive map computation — a chain of pure operators (joins, projections, selections) that has not yet been materialized into a CellMap. Map queries deliberately do not implement subscribe: to observe output you must call MapQuery::materialize, which installs ONE subscription per root source and returns a subscribable cell map.

This design makes the memoization boundary explicit. Today, chaining map operators (inner_join, left_join, project, …) creates an intermediate CellMap per stage — each with its own diff cell and per-key cells. By moving these operators onto MapQuery, the cost of an intermediate map is paid only when the caller explicitly asks for one with .materialize().

Re-exports

pub use share::MapQueryShareExt;

pub use share::SharedMapQuery;

Modules

share

Clone-able multicast handle that subscribes a MapQuery upstream lazily on the first downstream install, then fans diffs out to N consumers.

Traits

MapQuery

Uncompiled reactive map operation chain.