Anonymous blocks, a pair of '{...}' currently have no syntactic effect.
They do not create a new scope.

tl;dr - does anyone use them, or have seen them in the wild?

a=1;
{
b=2;
cube(b);
c=b+a;
module m(v) echo(v);
}
echo(a=a,b=b,c=c);
m("hello world");
//ECHO: a = 1, b = 2, c = 3
//ECHO: "hello world"

The only thing they do, AFAIK, is to allow the source to be collapsed in the
editor.

I have used that sometimes to group sets of variables and/or chunks of code.

Changes to OpenSCAD are now making the existence of such blocks
inconvenient.
But changing their behaviour COULD break backward compatibility.

I believe it is very unlikely that they they are used much.

So does anyone use them, or seen them in the wild? (In real code)

...and don't start collapsing code just because I mentioned it....

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Never seen them, never used them.

If you just want folding in the editor, it's better to have specific
commands for that. Example:

region("Nuts and bolts"){
     //All modules for nuts and bolts go here
    ...
}

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I use them regularily during debug and code analysis and for code
development.

//hull()
{
translate([10, 10, 10]) cube(10, 10,.1);
translate([10, -10, -10]) cube(10, 10,.1);
}

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I also use them for debugging and nudging things together.

For example:

translate ([10, 0, 0])
{
thing1();
translate ([15, 0, 0]) part2();
}

in this case, I have already gotten thing1 and part2 where I need them to be
in relationship to each other, now I need (or think I need) them moved
again, together.  It is easy enough to comment out if I don't need it, or
want to try it both ways.  This is also a great way to make microadjustments
to a part location/rotation.

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You can do:

module n() children();  // noop - do nothing to the children, just pass them
back

//hull()
n()
{
cube(10);
cylinder(d=5, h=20);
}

Admin - email* me if you need anything, or if I've done something stupid...

• click on my MichaelAtOz label, there is a link to email me.

Unless specifically shown otherwise above, my contribution is in the Public Domain; to the extent possible under law, I have waived all copyright and related or neighbouring rights to this work. Obviously inclusion of works of previous authors is not included in the above.

The TPP is no simple “trade agreement.”  Fight it! http://www.ourfairdeal.org/  time is running out!

Sent from: http://forum.openscad.org/