https://bugzilla.wikimedia.org/show_bug.cgi?id=48331
Web browser: ---
Bug ID: 48331
Summary: mw.string.gsub doesn’t support %f (“frontier”) search
pattern
Product: MediaWiki extensions
Version: unspecified
Hardware: All
OS: All
Status: NEW
Severity: normal
Priority: Unprioritized
Component: Scribunto
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected], [email protected],
[email protected]
Classification: Unclassified
Mobile Platform: ---
The %f (“frontier”) pattern is used to match a set’s boundary. It is the only
way to perform some searches. It is an undocumented feature of Lua 5.1,
officially documented starting in Lua 5.2.
It works in string.gsub, but not in mw.string.gsub. For example, in the debug
console:
> string.gsub ("THE (QUICK) brOWN FOx JUMPS", "%f[%a]%u+%f[%A]", print)
THE
QUICK
JUMPS
> mw.ustring.gsub ("THE (QUICK) brOWN FOx JUMPS", "%f[%a]%u+%f[%A]", print)
Since mw.ustring.gsub is supposed to be “much like string.gsub(),” this pattern
should be supported.
== Reference ==
Lua-Users.org: “Fronter Pattern”
http://lua-users.org/wiki/FrontierPattern
Lua 5.2 documentation: “Patterns”
http://www.lua.org/manual/5.2/manual.html#6.4.1
Scribunto docs: “mw.ustring.gsub”
https://www.mediawiki.org/wiki/Extension:Scribunto/Lua_reference_manual#mw.ustring.gsub
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