Reference: PLT Scheme

1`` | Language Model
2`` | Syntactic Forms
3`` | Datatypes
4`` | Structures
5`` | Classes and Objects
6`` | Units
7`` | Contracts
8`` | Pattern Matching
9`` | Control Flow
10`` | Concurrency
11`` | Macros
12`` | Input and Output
13`` | Reflection and Security
14`` | Operating System
15`` | Memory Management
16`` | Running PLT Scheme
| Bibliography
| Index

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unit?
provide-signature-elements

Version: 4.0.2
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#### 6.8`` Unit Utilities

(unit? v) → boolean?
v : any/c

Returns #t if v is a unit, #f otherwise.

(provide-signature-elements sig-spec ...)

Expands to a provide of all identifiers implied by the sig-specs. See unit for the grammar of sig-spec.

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