[Feature Request]: Allow capturing outer variables in FCFs

[alvaradoo]

Summary of Feature

Description:
This feature request is to be able to write FCFs that utilize outer variables.

Is this issue currently blocking your progress?
No, my workaround is by including a dummy variable in all of the functions, even though it is not used in 3/4 of them.

Code Sample

I want to be able to write the following code below without the following error being thrown: note: cannot capture proc 'multCriterion' because it refers to outer variables

const m:real = 0.05;

proc log10Criterion(n:int) { return floor(log10(n:real)); }
proc log2Criterion(n:int) { return floor(log2(n:real)); }
proc sqrtCriterion(n:int) { return floor(sqrt(n:real)/5); }
proc multCriterion(n:int) { return floor(m*n:real); }

var criterionFunction = if connectednessCriterion == "log10" then log10Criterion
                        else if connectednessCriterion == "log2" then log2Criterion
                        else if connectednessCriterion == "sqrt" then sqrtCriterion
                        else if connectednessCriterion == "mult" then multCriterion // errors out because `m` is an outer variable
                        else log10Criterion;