Vars

[alixander]

closes #105

[nhooyr]

This isn't implemented how I wanted it.

You_ can't compile vars before everything else. The var's map is a map just like any other D2 map and itself has to be compiled first. Vars should be resolved at the end and be defined on a per map basis, not a per board. Just like how variable scopes work.

If you define a variable in a for loop, it's only available in the for loop. You don't have to define it at the start of your function in order to make it available in your for loop.

[nhooyr]

Add a test for

vars: {
  my-var: ${my-var}
}

too

[nhooyr]

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