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| author | Phil Pennock <pdp@exim.org> | 2012-04-12 01:41:44 -0700 |
|---|---|---|
| committer | Phil Pennock <pdp@exim.org> | 2012-04-12 01:41:44 -0700 |
| commit | a39409651d6f823248380812dd7d01361a3b0169 (patch) | |
| tree | 9a85ebc1ac2926d45d628c856ff23d8cf14ed8ca /doc/doc-docbook | |
| parent | 3b4f55a3467f3c0dc52711f14fb3a593daa93f36 (diff) | |
Two clarifications.
String expansion, draw more attention to † marking.
Document the order in which parameters are supplied to relative comparators.
Diffstat (limited to 'doc/doc-docbook')
| -rw-r--r-- | doc/doc-docbook/spec.xfpt | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/doc/doc-docbook/spec.xfpt b/doc/doc-docbook/spec.xfpt index ed9b0d710..c1f845eaf 100644 --- a/doc/doc-docbook/spec.xfpt +++ b/doc/doc-docbook/spec.xfpt @@ -8536,6 +8536,13 @@ start of a portion of the string that is interpreted and replaced as described below in section &<<SECTexpansionitems>>& onwards. Backslash is used as an escape character, as described in the following section. +Whether a string is expanded depends upon the context. Usually this is solely +dependent upon the option for which a value is sought; in this documentation, +options for which string expansion is performed are marked with † after +the data type. ACL rules always expand strings. A couple of expansion +conditions do not expand some of the brace-delimited branches, for security +reasons. + .section "Literal text in expanded strings" "SECTlittext" @@ -9917,6 +9924,10 @@ 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. +In all cases, a relative comparator OP is testing if <&'string1'&> OP +<&'string2'&>; the above example is checking if &$message_size$& is larger than +10M, not if 10M is larger than &$message_size$&. + .vitem &*bool&~{*&<&'string'&>&*}*& .cindex "expansion" "boolean parsing" |