Error when attempting to "require" tprint

Posted by Bobble on Wed 31 Dec 2008 12:32 AM — 7 posts, 25,836 views.

Bobble Canada Wed 31 Dec 2008 12:32 AM #0

Greets everyone,

I wanted to try using the tprint function that Nick so kindly included with MUSHclient. However, when I tried to put it in my script file, I get an error.

I put:

require "tprint"

at the beginning of my script file. Now when it is loaded I get this error:

Run-time error
World: Curing - Plugin
Immediate execution
error loading module 'tprint' from file 'C:\Program Files\Games\MUSHclient\lua\tprint.lua':
        C:\Program Files\Games\MUSHclient\lua\tprint.lua:50: '<eof>' expected near 'function'
stack traceback:
        [C]: ?
        [C]: in function 'require'
        [string "Script file"]:13: in main chunk

I wish I could make sense of it. It seems it's missing an <eof> but I have no idea what that means or where to put it. Does anyone know what's causing this?

On a related note, I had been fooling around with tprint a few weeks ago. I wanted to call it from an alias so that I could specify the table I wanted printed in a wildcard, such as tprint * So I could type:

tprint cures

And have it print out the table cures. I copied and pasted the tprint function into my script file and then had my alias call this function.

function print_table (name, line, wildcards)
   tprint(wildcards[1])
end

I got an error when doing this because tprint was expecting a table, but got a string (wildcards[1]).

Does anyone know how I might create an alias that will have the tprint function print out a table specified in the wildcard?

Nick Gammon Australia Forum Administrator Wed 31 Dec 2008 12:50 AM #1

Sounds like tprint.lua has become corrupted. Try deleting that file and then reinstalling MUSHclient, to get a new copy.

As for "tprint cures" - tprint is a function, and unless you are sending a string literal, you have to put its arguments into quotes, like this:


tprint (cures)

This is also wrong:


tprint(wildcards[1])

Wildcards is a table, but wildcards [1] is a string, as it said. To look at your wildcards you need:


tprint(wildcards)

Bobble Canada Wed 31 Dec 2008 01:09 AM #2

Hi Nick,

I think I was unclear about what I was trying to achieve. I wasn't trying to print the list of wildcards. I was trying to call tprint from an alias where the wildcard specified which table I wanted to print.

Thus if I had a table titled cures:

cures = {
 {name = "goldenseal"  , type = "herb"},
 {name = "epidermal"   , type = "salve"},
 {name = "bloodroot"   , type = "herb"}
}

I could use this alias:

<aliases>
  <alias
   name="print_table"
   script="print_table"
   match="tprint *"
   enabled="y"
   sequence="100"
  >
  </alias>
</aliases>

to call function that would pass the wildcard on to the tprint function and have it print out the table that corresponds with the wildcard name.

So if I typed

tprint cures

it would print out the cures table I specified above. But, like I said, wildcards are strings and it won't accept them. I was just wondering if there was a way to remove the "strigness" from them so that it would realize that the wildcard matches a table that has been created.

Nick Gammon Australia Forum Administrator Wed 31 Dec 2008 01:20 AM #3

Oh. You mixed what looked like a script with what was really an alias. Try this:


function print_table (name, line, wildcards)
   tprint(_G [wildcards[1]])
end

_G is the global table, and thus indexing into it will give the appropriate table in the global variable space.

Nick Gammon Australia Forum Administrator Wed 31 Dec 2008 01:23 AM #4

I would normally do that without an alias, just type into the command window:


/tprint (cures)

I would need to ' require "tprint" ' before that would work, but I could put that into the sandbox to be executed every time the script engine loaded, if I was worried about it.

Bobble Canada Wed 31 Dec 2008 03:40 AM #5

I reinstalled mushclient, still no dice with require "tprint"

I've copied and pasted the function into my script file instead. Everything's hunkey dorey with that.

I tried making the function called by the alias a little less error prone:

function print_table (name, line, wildcards)
	if _G [wildcards[1]] and type(_G [wildcards[1]]) == "table" then
     	tprint(_G [wildcards[1]])
	else
	    Note ("No such table. Check your capitalization.")
	end
end

It works very well and has been making my scripting a great deal easier.

Thanks for your help, take care.

Nick Gammon Australia Forum Administrator Wed 31 Dec 2008 07:20 PM #6

I'm not sure about the error requiring tprint. For one thing, my copy of the file is 48 lines long, so it appears that the error must be at the very end of the file (ie. the <eof> - End Of File).

You must have an eof - every file ends, yes?

If the exact same file, copied and pasted in, works, I don't know what to suggest there.