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-rw-r--r--info/argparser.texinfo5
1 files changed, 4 insertions, 1 deletions
diff --git a/info/argparser.texinfo b/info/argparser.texinfo
index d774d8b..253c3bb 100644
--- a/info/argparser.texinfo
+++ b/info/argparser.texinfo
@@ -332,7 +332,10 @@ add additional options.
The trigger functions are functions that does not return any value,
and has two or three parameters: the used option alternative, the
standard option alternative, and for argumented but not variadic
-options: the used value.
+options: the used value but @code{null}@footnote{Or @code{NULL} or
+@code{None} depending on language} if there was not argument.
+In the Bash version only two arguments are used if there was not
+argument is the value of @code{$#} will be 2 instead of 3.
The the Java version, the standard option is not passed, so there
are only one or two parameters. Instead, the function is defined