Re: unescape lua string (opposite of %q)

[Jonathan Castello <twisolar@...>]

On Fri, Jun 4, 2010 at 11:37 PM, Ricardo Ramos Massaro
<ricardo.massaro@gmail.com> wrote:
> On Sat, Jun 5, 2010 at 3:18 AM, Jonathan Castello <twisolar@gmail.com> wrote:
>> ----
>> local input = [["line1"\nline2]]
>> input = input:gsub([["]], [[\"]])
>> local output = loadstring("return \"" .. input .. "\"")()
>> ----
>
> This one fails if the input contains a backslash followed by a double quote.
>
> -Ricardo
>

Bleh, good catch. I can't believe I forgot about these two.

----
function reverse_q(str)
str = str:gsub([[\?"]], [[\"]])
return (assert(loadstring("return \"" .. str .. "\""))())
end
----

Test: print(reverse_q[[\\\n\"]])
Output:
\
"

Those two should be the only ones you have to worry about, I think. \
is obvious, and " is because I'm using \" in loadstring.

~Jonathan