Languages / Knowledge library
Closure
Combines a function with captured variables from its defining scope
Why learn Closure?
It supports callbacks, factories, and private persistent state
The problem it solves
It lets executable behavior retain lexical context after that scope returns
Where it came from
Closure is a programming language and runtime concept that combines a function with captured variables from its defining scope. Its guarantees and tradeoffs depend on the concrete implementation and operating context.
Build your understanding
Work through these exercises in order. Try the task before opening a reference.
- Define Closure and distinguish it from a neighboring concept.
- Choose a realistic task where Closure is appropriate.
- Identify a failure mode caused by misusing Closure.
- Interpret a small design or result involving Closure.
- Explain one tradeoff or limitation of Closure.
Documentation and sources
- LLVM Language Reference Manual (llvm.org)