diff options
| author | Nigel Metheringham <nigel@exim.org> | 2009-10-14 14:48:40 +0000 |
|---|---|---|
| committer | Nigel Metheringham <nigel@exim.org> | 2009-10-14 14:48:40 +0000 |
| commit | f3766eb5a200d0deb99dc3f096ced249727940cd (patch) | |
| tree | c2cd6bc893834396868c3c821bd1e4faf6747ad5 /doc/doc-docbook | |
| parent | 36f12725ebda2bfd6ed4fe98b0eeaf1ce01f2604 (diff) | |
bool: condition support. fixes: #167
Diffstat (limited to 'doc/doc-docbook')
| -rw-r--r-- | doc/doc-docbook/spec.xfpt | 18 |
1 files changed, 17 insertions, 1 deletions
diff --git a/doc/doc-docbook/spec.xfpt b/doc/doc-docbook/spec.xfpt index 7add7e604..201aefc5d 100644 --- a/doc/doc-docbook/spec.xfpt +++ b/doc/doc-docbook/spec.xfpt @@ -1,4 +1,4 @@ -. $Cambridge: exim/doc/doc-docbook/spec.xfpt,v 1.54 2009/10/13 08:46:06 tom Exp $ +. $Cambridge: exim/doc/doc-docbook/spec.xfpt,v 1.55 2009/10/14 14:48:40 nm4 Exp $ . . ///////////////////////////////////////////////////////////////////////////// . This is the primary source of the Exim Manual. It is an xfpt document that is @@ -9732,6 +9732,22 @@ lower case), signifying multiplication by 1024 or 1024*1024, respectively. As a special case, the numerical value of an empty string is taken as zero. +.vitem &*bool&~{*&<&'string'&>&*}*& +.cindex "expansion" "boolean parsing" +.cindex "&%bool%& expansion condition" +This condition turns a string holding a true or false representation into +a boolean state. It parses &"true"&, &"false"&, &"yes"& and &"no"& +(case-insensitively); also positive integer numbers map to true if non-zero, +false if zero. Leading whitespace is ignored. +All other string values will result in expansion failure. + +When combined with ACL variables, this expansion condition will let you +make decisions in one place and act on those decisions in another place. +For example, +.code +${if bool{$acl_m_privileged_sender} ... +.endd + .vitem &*crypteq&~{*&<&'string1'&>&*}{*&<&'string2'&>&*}*& .cindex "expansion" "encrypted comparison" .cindex "encrypted strings, comparing" |