sema-docs 1.23.0

Canonical structured documentation for Sema builtins/special forms; powers LSP hover/completion and REPL apropos
Documentation 
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---
name: "fn?"
module: "predicates"
section: "Type Predicates"
---

Test if a value is a function. `procedure?` is an alias.

```sema
(fn? car)        ; => #t
(fn? 42)         ; => #f
```