FLIN
The language that replaces 47 technologies
A compiled, full-stack programming language built from scratch in Rust. One syntax for frontend, backend, database, and tooling. 3,200+ tests. 180 embedded UI components. Zero npm dependencies.
Building FLIN
The Pipeline Operator: Functional Composition in FLIN
How we implemented the pipeline operator in FLIN -- the |> syntax for functional composition, its parser transformation to function calls, and the developer experience it unlocks.
Tuples, Enums, and Structs
How we designed FLIN's three fundamental data structures -- tuples for anonymous grouping, enums for named alternatives, and entity structs for persistent records.
Type Guards and Runtime Type Narrowing
How FLIN's is operator enables runtime type checking with compile-time type narrowing -- the bridge between dynamic values and static safety.
The Never Type and Exhaustiveness Checking
How FLIN's Never type and exhaustiveness checking work together to guarantee that every code path is handled -- the compiler-enforced safety net for pattern matching and control flow.
Constraints and Validation in FlinDB
How FlinDB enforces data integrity with declarative constraints -- unique, required, check, pattern, immutable, and more -- all without writing a single SQL trigger.
Aggregations and Analytics
How we added aggregation functions, GROUP BY, DISTINCT, and IN/NOT IN operators to FlinDB in a single session -- making embedded analytics possible without SQL.
Index Utilization: Making Queries Fast
How Session 163 transformed FlinDB queries from O(n) full scans to O(1) index lookups -- automatic indexing, query optimization, and index maintenance in an embedded database.
Relationships and Eager/Lazy Loading
How FlinDB handles entity relationships with eager loading, lazy resolution, inverse queries, and auto-indexing -- all without SQL joins.
Transactions and Continuous Backup
How we implemented ACID transactions with savepoints, full and incremental backups with Zstd compression, continuous WAL streaming, and scheduled backup rotation in FlinDB.
Graph Queries and Semantic Search
How FlinDB implements graph traversal algorithms and AI-powered semantic search with BM25, vector similarity, and hybrid Reciprocal Rank Fusion -- all built into a single embedded database.
The EAVT Storage Model
How FlinDB's Entity-Attribute-Value-Time event sourcing model provides complete audit trails, temporal queries, and entity replay -- inspired by Datomic and built in Rust.
FLIN: The Language That Replaces 47 Technologies
One language for frontend, backend, database, and tooling. Built from scratch in Rust with 3,200+ tests. No npm. No Webpack. No framework fatigue.