6.10 Single-Unit Modules

► |  | Reference: Racket

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 | Unsafe Operations
17 | Running Racket
| Bibliography
| Index

▼ | 6 | Units

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

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#### 6.10`` Single-Unit Modules

When racket/unit is used as a language name with #lang, the module body is treated as a unit body. The body must match the following module-body grammar:

module-body

=

require-decl ...
( import tagged-sig-expr ...)
( export tagged-sig-expr ...)
init-depends-decl
unit-body-expr-or-defn
...

require-decl |  | = |  | ( require require-spec ...)
|  | | |  | ( begin require-decl ...)
|  | | |  | derived-require-form

After any number of require-decls, the content of the module is the same as a unit body.

The resulting unit is exported as base@, where base is derived from the enclosing module’s name (i.e., its symbolic name, or its path without the directory and file suffix). If the module name ends in -unit, then base corresponds to the module name before -unit. Otherwise, the module name serves as base.

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