6.8 Unit Utilities

procedure
(unit? v) → boolean?
v : any/c

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

syntax
(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.

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 and Parallelism
11	Macros
12	Input and Output
13	Reflection and Security
14	Operating System
15	Memory Management
16	Unsafe Operations
17	Running Racket
	Bibliography
	Index

6.1	Creating Units
6.2	Invoking Units
6.3	Linking Units and Creating Compound Units
6.4	Inferred Linking
6.5	Generating A Unit from Context
6.6	Structural Matching
6.7	Extending the Syntax of Signatures
6.8	Unit Utilities
6.9	Unit Contracts
6.10	Single-Unit Modules
6.11	Single-Signature Modules
6.12	Transformer Helpers