Nesting limits revisited

[Holladerwaldelf]

In a FAQ post Rumble explained:

MapTool 1.3 Release's macro language allows the nesting of operations (such as branching and looping operations) via the use of the CODE roll option and curly braces to demarcate groups of operations. However, you are restricted as to how many levels deep you can "nest" such operations. Use of the CODE block can extend only two levels deep

So if I try to nest three for loops inside each other I will get an error, e.g.:

Code: Select all

[for(i,0,2,1), code: 
	{
	[output = strformat("<b>i is %{i}:</b> ")]
	[for(j,0,3,1), code:
		{
		[output = strformat("j is %{j}")]
		[for(k,0,2,1), code:
			{
			[output = strformat("<i>k is %{k}</i>")]
			}]
		}]
	[output = strformat("<br>")]
	}]

In this example I could work around that by omitting the brackets in the inner loop, i.e.:

Code: Select all

[for(i,0,2,1), code: 
	{
	[output = strformat("<b>i is %{i}:</b> ")]
	[for(j,0,3,1), code:
		{
		[output = strformat("j is %{j}")]
		[for(k,0,2,1):	output = strformat("<i>k is %{k}</i>")]
		}]
	[output = strformat("<br>")]
	}]

But if I understand it correctly there is no way to have three nesting for-loops where each has more than one command, or is there a way to work around this limitation?

I run into the same problem when I want an if-comparison inside two nesting for loops (with more than one command), e.g.:

Code: Select all

[for(i,0,2,1), code: 
	{
	[output = strformat("<b>i is %{i}:</b> ")]
	[for(j,0,3,1), code:
		{
		[output = strformat("j is %{j}")]
		[if( j > 1 ), code:
			{
			[h: someVar = 1]
			[output = strformat("<i>j is big.</i>")]
			};{
			[h: someVar = 0]
			[output = strformat("<i>j is small.</i>")]
			}]
		}]
	[output = strformat("<br>")]
	}]

Same question: Is there any way to work around this?

[Holladerwaldelf]

Well in case of the 'if' the really ugly solution of using the same if-comparison over and over again just came to me, e.g.:

Code: Select all

[for(i,0,2,1), code: 
	{
	[output = strformat("<b>i is %{i}:</b> ")]
	[for(j,0,3,1), code:
		{
		[output = strformat("j is %{j}")]
		[if( j > 1 ): someVar = 1; someVar = 0]
		[if( j > 1 ): output = strformat("<i>j is big.</i>"); output = strformat("<i>j is small.</i>")]
		}]
	[output = strformat("<br>")]
	}]

That will not work for for-loops though...

[RPTroll]

Check out this wiki entry.

It has a few work arounds.

http://www.lmwcs.com/rptools/wiki/Worki ... ODE_Levels

[aliasmask]

I forget, does the new version increase this limit? I remember something about loops, but I'm not sure about nesting limits.

[RPTroll]

We have the beginnings of JavaScript which doesn't have the nesting limit but that is still in the early stages of implementation. The next round of development should see that capability grow significantly.

MTSscript still has the 2 deep limitation.

[Holladerwaldelf]

I am eagerly awaiting the implementation of JavaScript.
Is there a time horizon for that?

[wolph42]

i think that its in the next release

[Holladerwaldelf]

Any idea when that is planned?

[wolph42]

yup, last friday, then last monday, now... soon(tm).
stuff with sleep deprivation, overwork, crappy internet, etc etc and the fact that we don't have a download page for it yet (as its a new install, it wont be on the current dl page).