Node:Keyword Primitives, Previous:Keyword Procedures, Up:Keywords
Internally, a keyword is implemented as something like a tagged symbol,
where the tag identifies the keyword as being self-evaluating, and the
symbol, known as the keyword's dash symbol has the same name as
the keyword name but prefixed by a single dash. For example, the
keyword #:name has the corresponding dash symbol -name.
Most keyword objects are constructed automatically by the reader when it
reads a token beginning with #:. However, if you need to
construct a keyword object programmatically, you can do so by calling
make-keyword-from-dash-symbol with the corresponding dash symbol
(as the reader does). The dash symbol for a keyword object can be
retrieved using the keyword-dash-symbol procedure.
| make-keyword-from-dash-symbol symbol | Scheme Procedure |
| scm_make_keyword_from_dash_symbol (symbol) | C Function |
| Make a keyword object from a symbol that starts with a dash. |
| keyword? obj | Scheme Procedure |
| scm_keyword_p (obj) | C Function |
Return #t if the argument obj is a keyword, else
#f.
|
| keyword-dash-symbol keyword | Scheme Procedure |
| scm_keyword_dash_symbol (keyword) | C Function |
Return the dash symbol for keyword.
This is the inverse of make-keyword-from-dash-symbol.
|