463 posts
Star Wars
Posted 11 July 2016 - 05:44 PM
Does this ('^%a[%w_]+') pattern work for every Lua identifier?
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Lua identifier
Started by Sewbacca, 11 July 2016 - 03:44 PM
758 posts
Budapest, Hungary
Posted 11 July 2016 - 06:19 PM
If the identifier starts at the first character of the string, then yeah, almost. I'd use
^[%a_][%w_]*
463 posts
Star Wars
Posted 11 July 2016 - 07:10 PM
^[%a_][%w_]*
I think
^[%a_][%w_]-
Is better, because * goes to the last found of [%w_], and - goes to the last found of [%w_] without gaps, <– ^^
but thanks ^^.
I think
^[%a_][%w_]-
Is better, because * goes to the last found of [%w_], and - goes to the last found of [%w_] without gaps, <– ^^
but thanks ^^.
Edited on 14 July 2016 - 02:43 PM
758 posts
Budapest, Hungary
Posted 11 July 2016 - 07:46 PM
Come again? Gape? You mean gap? Nope, that's not how it works. [%w_]* comes after [%a_], so whatever [%w_]* matched must come after whatever [%a_] matched. [%w_]- will match the least possible characters, which since you already have an [%a_] in there will be an empty string.
797 posts
Posted 11 July 2016 - 08:25 PM
Not quite, it won't match an already matched character, so the '-' section will just match one more character. You'll be limited to just 2 character identifiers, no more or less, if you do it with a '-' instead of '*'. LBPHacker's first suggestion is the way to do it.
758 posts
Budapest, Hungary
Posted 11 July 2016 - 08:37 PM
Nope, the '-' section won't match anything. As I've stated above, '-' will match the least possible number of characters, which is, in this case, 0. The '-' is used in situations in which it's followed by other sections, such as
local command, arguments = command_line:match("^%s*(.-) (.*)%s*$")Edited on 11 July 2016 - 06:37 PM
797 posts
Posted 11 July 2016 - 08:41 PM
Ah, you're right. For some reason I thought the '-' matched at least one character, but it can match none as well. My bad.