diff options
Diffstat (limited to 'doc')
| -rw-r--r-- | doc/doc-docbook/spec.xfpt | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/doc/doc-docbook/spec.xfpt b/doc/doc-docbook/spec.xfpt index ed5b06a2d..36ed7ca09 100644 --- a/doc/doc-docbook/spec.xfpt +++ b/doc/doc-docbook/spec.xfpt @@ -6755,6 +6755,9 @@ domains = ${lookup{$sender_host_address}lsearch{/some/file}} domains = lsearch;/some/file .endd The first uses a string expansion, the result of which must be a domain list. +.new +The key for an expansion-style lookup must be given explicitly. +.wen No strings have been specified for a successful or a failing lookup; the defaults in this case are the looked-up data and an empty string, respectively. The expansion takes place before the string is processed as a list, and the @@ -6779,6 +6782,12 @@ domain2: Any data that follows the keys is not relevant when checking that the domain matches the list item. +.new +The key for a list-style lookup is implicit, from the lookup context, if +the lookup is a single-key type (see below). +For query-style lookup types the key must be given explicitly. +.wen + It is possible, though no doubt confusing, to use both kinds of lookup at once. Consider a file containing lines like this: .code |