for the records some trivial templates for yasnippet, which is derived from textmates standard and is similar to snippMate for vim.

Not too far away from Abbrevations in Komodo.

# -*- mode: snippet -*-
# name: caller;
# key: caller
# --
my (${1:$package}, ${2:$filename}, ${3:$line}) = caller;
$0
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# -*- mode: snippet -*-
# name: caller(LEVEL)
# key: caller
# --
my (${2:$package}, ${3:$filename}, ${4:$line}, ${5:$subroutine}, ${6:$
+hasargs},
${7:$wantarray}, ${8:$evaltext}, ${9:$is}_require, ${10:$hints}, ${11:
+$bitmask},
${12:$hinthash}) = caller(${1:$LEVEL});
$0
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please note that both versions of caller are expanded with the same keyword + TAB and you can chose from a dropdown between both versions.

here the example for splice

# -*- mode: snippet -*-
# name: splice @ARR ,OFFSET ,LENGTH ,LIST
# key: splice
# --
splice @${1:ARR} ,${2:OFFSET} ,${3:LENGTH} , ${4:LIST...};
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since I can include code (elisp but also bash or Perl) I'd like to find a way to delete the commas of skipped arguments instead of creating 4 versions for drop down... but I'm still at the beginning.

Vision: Ideally these snippets could be generated from POD-examples and show the documentation¹, I think DBI is a good candidate.

PS: thanks to Tux for suggesting the return values for stat, (local)time, and caller (with or without args)

¹) probably best realized in combination with autocomplete-mode ... unfortunately emacs-wiki seems to be down at the moment...