Responded to two simple CR comments

packages/squiggle-lang/__tests__/GenericDist/GenericOperation__Test.res

@@ -59,7 +59,7 @@ describe("toPointSet", () => {
       run(#fromDist(#toDist(#toPointSet), #SampleSet([0.0, 1.0, 2.0, 3.0])))->fmap(
         #fromDist(#toFloat(#Mean)),
       )
-    expect(result)->toEqual(#Error(Other("Converting sampleSet to pointSet failed")))
+    expect(result)->toEqual(#GenDistError(Other("Converting sampleSet to pointSet failed")))
   })
 
   test("on sample set", () => {

packages/squiggle-lang/src/rescript/GenericDist/GenericDist.res

@@ -207,7 +207,7 @@ let pointwiseCombinationFloat = (
   operation: GenericDist_Types.Operation.arithmeticOperation,
   f: float,
 ): result<t, error> => {
-  switch operation {
+  let m = switch operation {
   | #Add | #Subtract => Error(GenericDist_Types.DistributionVerticalShiftIsInvalid)
   | (#Multiply | #Divide | #Exponentiate | #Log) as operation =>
     toPointSet(t)->E.R2.fmap(t => {
@@ -222,10 +222,12 @@ let pointwiseCombinationFloat = (
         t,
       )
     })
-  }->E.R2.fmap(r => #PointSet(r))
+  }
+  m->E.R2.fmap(r => #PointSet(r))
 }
 
 //Note: The result should always cumulatively sum to 1. This would be good to test.
+//Note: If the inputs are not normalized, this will return poor results. The weights probably refer to the post-normalized forms. It would be good to apply a catch to this.
 let mixture = (
   values: array<(t, float)>,
   scaleMultiply: scaleMultiplyFn,

packages/squiggle-lang/src/rescript/GenericDist/GenericDist_GenericOperation.res

@@ -1,4 +1,4 @@
-type operation = GenericDist_Types.Operation.genericFunctionCall
+type operation = GenericDist_Types.Operation.genericFunctionCallInfo
 type genericDist = GenericDist_Types.genericDist
 type error = GenericDist_Types.error
 
@@ -11,9 +11,9 @@ type params = {
 
 type outputType = [
   | #Dist(genericDist)
-  | #Error(error)
   | #Float(float)
   | #String(string)
+  | #GenDistError(error)
 ]
 
 module Output = {
@@ -37,7 +37,7 @@ module Output = {
 
   let toError = (o: outputType) =>
     switch o {
-    | #Error(d) => Some(d)
+    | #GenDistError(d) => Some(d)
     | _ => None
     }
 }
@@ -45,14 +45,14 @@ module Output = {
 let fromResult = (r: result<outputType, error>): outputType =>
   switch r {
   | Ok(o) => o
-  | Error(e) => #Error(e)
+  | Error(e) => #GenDistError(e)
   }
 
 let outputToDistResult = (b: outputType): result<genericDist, error> =>
   switch b {
   | #Dist(r) => Ok(r)
-  | #Error(r) => Error(r)
+  | #GenDistError(r) => Error(r)
-  | _ => Error(ImpossiblePath)
+  | _ => Error(Unreachable)
   }
 
 let rec run = (extra, fnName: operation): outputType => {
@@ -65,16 +65,16 @@ let rec run = (extra, fnName: operation): outputType => {
   let toPointSet = r => {
     switch reCall(~fnName=#fromDist(#toDist(#toPointSet), r), ()) {
     | #Dist(#PointSet(p)) => Ok(p)
-    | #Error(r) => Error(r)
+    | #GenDistError(r) => Error(r)
-    | _ => Error(ImpossiblePath)
+    | _ => Error(Unreachable)
     }
   }
 
   let toSampleSet = r => {
     switch reCall(~fnName=#fromDist(#toDist(#toSampleSet(sampleCount)), r), ()) {
     | #Dist(#SampleSet(p)) => Ok(p)
-    | #Error(r) => Error(r)
+    | #GenDistError(r) => Error(r)
-    | _ => Error(ImpossiblePath)
+    | _ => Error(Unreachable)
     }
   }
 
@@ -106,7 +106,7 @@ let rec run = (extra, fnName: operation): outputType => {
       dist->GenericDist.toPointSet(xyPointLength)->E.R2.fmap(r => #Dist(#PointSet(r)))->fromResult
     | #toDist(#toSampleSet(n)) =>
       dist->GenericDist.sampleN(n)->E.R2.fmap(r => #Dist(#SampleSet(r)))->fromResult
-    | #toDistCombination(#Algebraic, _, #Float(_)) => #Error(NotYetImplemented)
+    | #toDistCombination(#Algebraic, _, #Float(_)) => #GenDistError(NotYetImplemented)
     | #toDistCombination(#Algebraic, operation, #Dist(dist2)) =>
       dist
       ->GenericDist.algebraicCombination(toPointSet, toSampleSet, operation, dist2)
@@ -143,7 +143,7 @@ let fmap = (
   let newFnCall: result<operation, error> = switch (fn, input) {
   | (#fromDist(fromDist), #Dist(o)) => Ok(#fromDist(fromDist, o))
   | (#fromFloat(fromDist), #Float(o)) => Ok(#fromFloat(fromDist, o))
-  | (_, #Error(r)) => Error(r)
+  | (_, #GenDistError(r)) => Error(r)
   | (#fromDist(_), _) => Error(Other("Expected dist, got something else"))
   | (#fromFloat(_), _) => Error(Other("Expected float, got something else"))
   }

packages/squiggle-lang/src/rescript/GenericDist/GenericDist_GenericOperation.resi

@@ -5,12 +5,12 @@ type params = {
 
 type outputType = [
   | #Dist(GenericDist_Types.genericDist)
-  | #Error(GenericDist_Types.error)
+  | #GenDistError(GenericDist_Types.error)
   | #Float(float)
   | #String(string)
 ]
 
-let run: (params, GenericDist_Types.Operation.genericFunctionCall) => outputType
+let run: (params, GenericDist_Types.Operation.genericFunctionCallInfo) => outputType
 let runFromDist: (
   params,
   GenericDist_Types.Operation.fromDist,

packages/squiggle-lang/src/rescript/GenericDist/GenericDist_Types.res

@@ -6,7 +6,7 @@ type genericDist = [
 
 type error =
   | NotYetImplemented
-  | ImpossiblePath
+  | Unreachable
   | DistributionVerticalShiftIsInvalid
   | Other(string)
 
@@ -67,12 +67,13 @@ module Operation = {
     | #fromFloat(fromDist)
   ]
 
-  type genericFunctionCall = [
+  type genericFunctionCallInfo = [
     | #fromDist(fromDist, genericDist)
     | #fromFloat(fromDist, float)
     | #mixture(array<(genericDist, float)>)
   ]
 
+  //TODO: Should support all genericFunctionCallInfo types
   let toString = (distFunction: fromDist): string =>
     switch distFunction {
     | #toFloat(#Cdf(r)) => `cdf(${E.Float.toFixed(r)})`