CodoMetis.ValueRanges

v6.0.0

In-memory range and multirange types for .NET 10, mirroring PostgreSQL's six built-in range domains (int4range, int8range, numrange, daterange, tsrange, tstzrange) plus TimeRange over TimeOnly — the time-of-day range PostgreSQL users conventionally add as CREATE TYPE timerange AS RANGE (subtype = time). Each type is a discriminated union of five sealed variants (Finite, UnboundedStart, UnboundedEnd, EmptyRange, Infinity) with invalid states unrepresentable at compile time. Includes the full PostgreSQL interval algebra — Contains, Overlaps, IsAdjacentTo, Intersect, Union, Except, Complement, Merge (range_merge), bound accessors (lower/upper/lower_inc/upper_inc), and the RangeAgg/RangeIntersectAgg aggregates — plus RangeSet<TRange, T> as an immutable, always-normalized multirange with the complete multirange operator matrix. v6 adds value sets: immutable, canonical (deduplicated, sorted, null-free) sets of scalar values whose PostgreSQL storage shape is a native array — StringSet (text[]), GuidSet (uuid[]), Int16Set/Int32Set/Int64Set, DecimalSet, DateSet, TimeSet, DateTimeSet, DateTimeOffsetSet — plus validated-wrapper arities (StringSet<T>, GuidSet<T>, Int32Set<T>, Int64Set<T>) for Vogen/Metalama/StronglyTypedId-style domain values, constrained only on BCL interfaces. Membership algebra (Contains, Overlaps, IsSubsetOf, IsSupersetOf, Union), PostgreSQL array literals, and collection expressions included. All types implement IParsable<T> and IFormattable using PostgreSQL literal syntax, and ship with System.Text.Json converters for direct use in ASP.NET Core APIs. No database dependency.