Re: A little comment randomness

[Majic <majic.one@...>]

Nifty, do leik :D

On Sun, Feb 14, 2010 at 12:01 AM, Jonathan Castello <solugon@hotmail.com> wrote:
> Let me try that again, from Gmail this time...
> ----
>
> Back when I used to use C++ a lot, I came up with a creative abuse of
> comments to let me decide which of two sections to compile based on
> the presence of a single character. I just happened to come up with a
> similar construct in Lua as well, and I thought I'd share it. I don't
> know if anyone else has come up with it before - it /is/ really simple
> - but it occurred to me as I read the section on comments in the  "The
> Evolution of Lua" PDF.
>
> --[[
>  print("one")
> --[=[ <Two-way comment> ]]
>  print("two")
> --]=]
>
> This construct will only allow print("two") to be executed. By adding
> a - to the first comment, the structure 'toggles', and only
> print("one") executes. It also just so happens that you can disable
> both blocks at once by changing [[ to [=[. Lastly, no matter how it's
> toggled, the middle comment has a convenient space for a
> human-readable comment.
>
> I'm not sure how useful this would be to anyone else, but I like to
> use constructs like this to preserve old code while I'm developing a
> newer block.
>
> ~Jonathan Castello
>
> On Sat, Feb 13, 2010 at 11:58 PM, Jonathan Castello <solugon@hotmail.com> wrote:
>>
>> Back when I used to use C++ a lot, I came up with a creative abuse of comments to let me decide which of two sections to compile based on the presence of a single character. I just happened to come up with a similar construct in Lua as well, and I thought I'd share it. I don't know if anyone else has come up with it before - it /is/ really simple - but it occurred to me as I read the section on comments in the  "The Evolution of Lua" PDF.
>> --[[  print("one")--[=[ <Two-way comment> ]]  print("two")--]=]
>> This construct will only allow print("two") to be executed. By adding a - to the first comment, the structure 'toggles', and only print("one") executes. It also just so happens that you can disable both blocks at once by changing [[ to [=[. Lastly, no matter how it's toggled, the middle comment has a convenient space for a human-readable comment.
>> I'm not sure how useful this would be to anyone else, but I like to use constructs like this to preserve old code while I'm developing a newer block.
>> ~Jonathan Castello
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>