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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make-special-comment
special-comment?
special-comment-value

Version: 4.0.2
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##### 12.9.3`` Special Comments

(make-special-comment v) → special-comment?
v : any/c

Creates a special-comment value that encapsulates v. The read, read-syntax, etc. procedures treat values constructed with make-special-comment as delimiting whitespace when returned by a reader-extension procedure (see Reader-Extension Procedures).

(special-comment? v) → boolean?
v : any/c

Returns #t if v is the result of make-special-comment, #f otherwise.

(special-comment-value sc) → any
sc : special-comment?

Returns the value encapsulated by the special-comment value sc. This value is never used directly by a reader, but it might be used by the context of a read-char-or-special, etc. call that detects a special comment.

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