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| author | Maxim Cournoyer <maxim.cournoyer@gmail.com> | 2022-08-24 14:40:38 +0200 |
|---|---|---|
| committer | Maxim Cournoyer <maxim.cournoyer@gmail.com> | 2022-08-24 22:34:45 -0400 |
| commit | 1c803e63f9560b93afeec9f7342f4413ff3cec46 (patch) | |
| tree | 0482d40b846cdd02303d2cb89b2f1ed5150ce0ae /doc | |
| parent | 31339f5f5ffd80f3fca9dbe49990fa3be4234bb5 (diff) | |
| download | guix-1c803e63f9560b93afeec9f7342f4413ff3cec46.tar guix-1c803e63f9560b93afeec9f7342f4413ff3cec46.tar.gz | |
services: configuration: Add a 'maybe-value-set?' procedure.
* gnu/services/configuration.scm (maybe-value-set?): New procedure.
* doc/guix.texi (Complex Configurations): Document it. Remove comment showing
usage of 'maybe-string' with a default value, which doesn't make sense.
Co-authored-by: Attila Lendvai <attila@lendvai.name>
Diffstat (limited to 'doc')
| -rw-r--r-- | doc/guix.texi | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/doc/guix.texi b/doc/guix.texi index 023b48ae35..c8f18a1482 100644 --- a/doc/guix.texi +++ b/doc/guix.texi @@ -39003,7 +39003,7 @@ to be a string, or left unspecified. (name ;; If set to a string, the `serialize-string' procedure will be used ;; to serialize the string. Otherwise this field is not serialized. - maybe-string ; equivalent to (maybe-string *unspecified*) + maybe-string "The name of this module.")) @end lisp @@ -39034,6 +39034,11 @@ whether its value is set or not. @end lisp @end deffn +@deffn (Scheme Procedure) maybe-value-set? @var{value} +Predicate to check whether a user explicitly specified the value of a +maybe field. +@end deffn + @deffn {Scheme Procedure} serialize-configuration @var{configuration} @ @var{fields} Return a G-expression that contains the values corresponding to the |