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Debug

This dialog is invoked by calling debug.debug () from within a Lua script.

You can use it to inspect variables, do a traceback, enter debugging commands, or abort the script.

Source

The short form of the source of this script. If loaded from a file it will be the filename preceded by the "@" symbol.

First, last lines

If known, the first and last line numbers in which the current function was defined.

Current line

The line number inside the script at which the debug.debug () command resides.

What function is

This will be one of:


  • Lua - a regular Lua function
  • main - inside the main Lua chunk (that is, not inside a function)
  • C - a C function


Name

If it can be determined, the name of the current function, followed by what the name is in brackets. (eg. "myfunction (local)" ).

Function

The function address.

Number of upvalues

How many upvalues this function has.

Show upvalues

Clicking this runs a small script to display the upvalues of the current function, if any, in the output window. The script looks like this:


do 
local i, name, val = 1 
local t = debug.getinfo (3, 'f') 
local f = t.func 
-- keep going until we run out of values
repeat 
  name, val = debug.getupvalue (f, i) 
  if name then  
    ColourNote ('limegreen', 'black', name .. ' = ' .. tostring (val))  
    i = i + 1  
  end 
until not name	
ColourNote ('limegreen', 'black', tostring (i - 1) .. ' upvalue(s)') 
end -- of local block



Show locals

Clicking this runs a small script to display the local variables of the current function, if any, in the output window. The script looks like this:


do local i, name, val = 1 
repeat 
 name, val = debug.getlocal (3, i) 
  if name then  
    ColourNote ('limegreen', 'black', name .. ' = ' .. tostring (val))  
    i = i + 1  
  end 
until not name	 
ColourNote ('limegreen', 'black', tostring (i - 1) .. ' local(s)') 
end -- local block



Traceback

Clicking this runs a small script do display the traceback information, namely:


ColourNote ('limegreen', 'black', debug.traceback ())


Command

You can type Lua commands into this window and press <Enter> (or click on Do Command). The command you entered is sent to the Lua interpreter to be executed in the context of the current script. For example, you could print or change global variables. The current command is remembered from one debug session to the next.

Edit...

Click this to edit the current contents of the command window in a larger dialog box. This larger box has access to function help, and function-name completion.

Do command

Sends the contents of the "command" box to the Lua interpreter.

Continue execution

Lets the script that called debug.debug () continue executing. Pressing <Esc> to dismiss the dialog has the same effect.

Abort script

Aborts the calling script with the error "Script aborted".


See Also ...

Topics

Arrays
Database (SQLite)
Lua base functions
Lua bc (big number) functions
Lua bit manipulation functions
Lua coroutine functions
Lua debug functions
Lua io functions
Lua LPEG library
Lua math functions
Lua os functions
Lua package functions
Lua PCRE regular expression functions
Lua script extensions
Lua SQLite (database) interface
Lua string functions
Lua syntax
Lua table functions
Lua utilities
Plugins
Scripting
Scripting callbacks - MXP
Scripting callbacks - plugins
Scripting data types
Scripting functions list
Scripting return codes
Utilities
Variables
World functions

Dialog

Scripts

(Help topic: dialog=IDD_LUA_DEBUG)

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