Fuse is a statically typed, purely functional programming language with higher-kinded types and ad-hoc polymorphism. It compiles to the GRIN whole-program optimizer, which produces LLVM-generated native code. The type system is based on System F with higher-order polymorphism, and it offers algebraic data types, generics, and traits to model your domain. Every function in Fuse is pure, and the language supports pattern matching, higher-order functions, and do notation for expressive, composable code. It uses bidirectional type checking with support for higher-order types, so only function type signatures are required and everything else is inferred. The syntax draws inspiration from Rust, Python, Scala, and Haskell, using indentation-based blocks, lambda expressions, and ML-like syntax to keep code readable and approachable. Fuse is aimed at developers who want a readable, purely functional language that still produces fast, small native binaries with zero-cost abstractions.

Use Cases

Developers writing purely functional programs that need native performance
Building fast, small native binaries with zero-cost abstractions
Modeling complex domains using algebraic data types, generics, and traits
Writing composable code with higher-order functions and pattern matching
Using type inference to reduce boilerplate while keeping function signatures explicit
Leveraging whole-program optimization via GRIN for efficient code generation

Fuse Programming Language

Use Cases

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