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Diffstat (limited to 'docs/special_vars.txt')
| -rw-r--r-- | docs/special_vars.txt | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/docs/special_vars.txt b/docs/special_vars.txt index f19b2bb2..36517f78 100644 --- a/docs/special_vars.txt +++ b/docs/special_vars.txt @@ -114,3 +114,19 @@ surrounding text will not affect the expression's return value. /eval echo foo${N}foo /* ${N} returns current nickname */ fooYourNickfoo /* returned by above command */ +When writing an alias containing a /script exec, special consideration has to be +taken to $vars and statement delimiters, ie. ; +/alias tries to evaluate all $vars as expandos, which would mean that what you +pass on to /script exec isn't necessarily what you intended. +Compare: + + 1. /alias al1 script exec my $var = "Hello"; print $var; + 2. /alias al2 script exec my $$var = "Hello"\; print $$var; + 3. /alias al3 script exec my \$var = "Hello"\; print \$var; (Same as nr 2) + +In example nr 1 $var would be expanded to an empty string and ; would end +the /script exec command, leaving print $var as a separate command to be run by +irssi. In example 2 $$ is evaluated to a literal $ leaving a literal $var to be +passed on to /script exec. The same goes for \; which is turned into a +literal ; and thus is passed on to /script exec as a statement delimiter. +This would mean print $$var is part of the /script exec being evaluated. |