Modul:SimpleDebug/doc

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Contains a functions to help debug the lua modules. It allows to collect and view the values of several variables and/or points in your lua program, from a module (which is usual) or in several modules (which are required from the main module).

It is designed so that its functions are called from within the module that is to be debugged, calls that will have to be part of the code (of the module that you have designed, or that you want to improve or adapt) until you decide to delete them (when you already have determined the bug). Thus, you do not have to call any of its functions from an invoke.

Uses[szerkesztés]

One or several points to watch
Function abbreviations: w: where. n: names. v: variables. s: string.
Variables
Name Default
tab.oneline true
  • If it is false or it is true and contains nested tables, it will show a line for each item in the table and with an indent for each nested table.
  • If it is true and it does not contain nested tables, it shows the table in a line.
tab.allidx false

If it is true then also displays the numerical indexes of a table.

dec -1

Spaces for the decimals:

  • -1: It displays all required decimals.
  • 0: No decimals.
  • n: 1: one decimal, 2: two decimals, etc.
enabled true

If it is false all calls to the below functions do nothing.

nohtml false

In strings, it replaces < for ⪡ and > for ⪢.

plaintext false

Deletes html format.

One point to watch
Functions
w (where)
  • where: point label.
v (...)
  • ...: a number of variables = var1, var2...
wv (where, ...)
  • where: point label.
  • ...: a number of variables = var1, var2...
nv (...)
  • ...: a number of pairs of name-variable = name1, var1, name2, var2....
wnv (where, ...)
  • where: point label.
  • ...: a number of pairs of name-variable = name1, var1, name2, var2....
Several points to watch
Variables
Name Default
s

The string variable that holds the returned values from the next functions.

maxlines.num 100

The maxim number of lines (on calling the next functions).

maxlines.doerror true

If it is true and maxlines.num is reached, error(s) is called.

counter false

Adds an autoincremental number at the beginning of each call of a function.

Functions
breakline ()

Adds a break line in s.

wtos (where)

Equal to w, but the return string is stored in s.

vtos (...)

Equal to v, but the return string is stored in s.

wvtos (where, ...)

Equal to wv, but the return string is stored in s.

nvtos (...)

Equal to nv, but the return string is stored in s.

wnvtos (where, ...)

Igual a wnv, but the return string is stored in s.

Examples[szerkesztés]

One point to watch[szerkesztés]

Following the flow[szerkesztés]

local SD = require "Module:SimpleDebug"
return SD.v ('Here is reached')

returns:

Here is reached


Number of decimal places and value of a variable[szerkesztés]

local SD = require "Module:SimpleDebug"
SD.dec = 2
return SD.v (1/3)

returns:

0.33


Nohtml[szerkesztés]

local SD = require "Module:SimpleDebug"
SD.nohtml = true
return SD.v ("<b>bold</b>")

returns:

"⪡b⪢bold⪡/b⪢"


Plaintext[szerkesztés]

local SD = require "Module:SimpleDebug"
SD.plaintext = true
return SD.v ("<b>bold</b>")

returns:

"bold"


The value of several variables[szerkesztés]

local SD = require "Module:SimpleDebug"
local a = 12
local b = 'Hello'
return SD.v (a,b)

returns:

12  •  "Hello"


Non-assigned variable detection[szerkesztés]

local SD = require "Module:SimpleDebug"
local a = true
return SD.v (a,b)

returns:

true  •  nil


The value of a table[szerkesztés]

local SD = require "Module:SimpleDebug"
local a = {1, tab='a', 'b'}
return SD.v (a)

returns: { 1, "b", [tab]="a", }


local SD = require "Module:SimpleDebug"
local a = {{1,2,3},{4,5,6},{7,8,9}}
return SD.v (a)

returns:

{
  [1] = {1, 2, 3, },
  [2] = {4, 5, 6, },
  [3] = {7, 8, 9, },
} 


local SD = require "Module:SimpleDebug"
local a = {{First=1,2,3},{4,Second=5,6},{7,8,9}}
return SD.v (a)

returns:

{ 
 [1] = {2, 3, [First]=1, },
 [2] = {4, 6, [Second]=5, },
 [3] = {7, 8, 9, },
}


local SD = require "Module:SimpleDebug"
SD.allidx = true
local a = {{1,2,3},{4,5,6},{7,8,9}}
return SD.v (a)

returns:

{ 
  [1]={[1]=1, [2]=2, [3]=3, }, 
  [2]={[1]=4, [2]=5, [3]=6, }, 
  [3]={[1]=7, [2]=8, [3]=9, }, 
}


Usually, you implement these functions with error function:

local SD = require "Module:SimpleDebug"
local a = {{1,2,3},{4,5,6},{7,8,9}}
error (SD.v (a))

displays:

Lua error:Module:YourModule:Line:{

  [1] = {1, 2, 3, },
  [2] = {4, 5, 6, },
  [3] = {7, 8, 9, },
}


All values of a table in multiline[szerkesztés]

local SD = require "Module:SimpleDebug"
SD.tab.oneline = false
local a = {{First=1,2,3},'Middle',{4,Second=5,6}}
return SD.v (a)

retorna:

{
 [1] = {
     [1] = 2,
     [2] = 3,
     ["First"] = 1,
   },
 [2] = "Middle",
 [3] = {
     [1] = 4,
     [2] = 6,
     ["Second"] = 5,
   },
}


The value of several variables with their name in a point[szerkesztés]

local SD = require "Module:SimpleDebug"
local a = 12
local b = 'Hello'
return SD.nv ('a',a,'b',b)

returns:

a: 12  •  b: "Hello"


Several points to watch[szerkesztés]

Following the flow[szerkesztés]

local SD = require "Module:SimpleDebug" 
local tab = {1,12,7}
function p.CheckValues ()
  local function LittleNum()
    SD.wtos ('little number')
  end
  local function BigNum(num)
    SD.wtos ('big='..num)
  end
  for i, num in ipairs(tab) do
    if num > 9 then
      BigNum(num)
    else
      LittleNum()
    end  
  end  
  error (SD.s)
end

returns:

Lua Error:Module:Your module:Line:

little number

big=12

little number.


With counter[szerkesztés]

local SD = require "Module:SimpleDebug" 
function Increm()
  local n = 0
  for i = 1, 3 do
    n = n + 2
    SD.vtos (n)
  end
end
SD.counter = true
Increm()
return SD.s

returns:

1  •  2

2  •  4

3  •  6


Monitoring of several variables[szerkesztés]

local SD = require "Module:SimpleDebug"
a = 12
b = 'Hello'
SD.vtos (1,a,b)
a = a + a
b = b..' world!'
SD.vtos ('Finally',a,b)
return SD.s

returns:

1 => 12  •  "Hello"

Finally => 24  •  "Hello world!"


local SD = require "Module:SimpleDebug"
SD.breakline ()
a = 12
b = 'Hello'
c = false
SD.nvtos (1,'a',a,'b',b,'c',c)
a = a + a
b = b..' world!'
SD.nvtos ('Finally','a',a,'b',b)
error (SD.s)

displays:

Lua error:Module:YourModule:Line:

1 => a: 12  •  b: "Hello"  •  c: false

Finally => a: 24  •  b: "Hello world!"

Variables and their presentation with conditions[szerkesztés]

local SD = require "Module:SimpleDebug"
SD.breakline()
SD.enabled = false
SD.maxlines.num = 3
local a = 'AA'
for i = 1, 10 do
  a = a + 'AA'
  if i == 3 then
    SD.enabled = true
  end
  SD.nvtos (i, string.len(a), a)
end

displays:

Lua error:Module:YourModule:Line:

3 => 8  •  "AAAAAAAA"

4 => 10  •  "AAAAAAAAAA"

5 => 12  •  "AAAAAAAAAAAA".