First attempt at simple working environment

src/components/DistBuilder.re

@@ -152,7 +152,7 @@ module DemoDist = {
                  shapeLength: Some(options.downsampleTo |> E.O.default(1000))
                },
                ~distPlusIngredients,
-               ~inputVariables=
+               ~environment=
                  [|("p", `SymbolicDist(`Float(1.0)))|]
                  ->Belt.Map.String.fromArray,
                (),

src/components/Drawer.re

@@ -393,6 +393,7 @@ module Draw = {
     let normalShape =
       ExpressionTree.toShape(
         {sampleCount: 10000, outputXYPoints: 10000, kernelWidth: None, shapeLength:numSamples},
+        ExpressionTypes.ExpressionTree.Environment.empty,
         `SymbolicDist(normal),
       ) |> E.R.toExn;
     let xyShape: Types.xyShape =

src/distPlus/expressionTree/ExpressionTree.re

@@ -1,17 +1,17 @@
 open ExpressionTypes.ExpressionTree;
 
-let toLeaf = (samplingInputs, node: node) => {
+let toLeaf = (samplingInputs, environment, node: node) => {
   node
   |> ExpressionTreeEvaluator.toLeaf({
        samplingInputs,
+       environment,
        evaluateNode: ExpressionTreeEvaluator.toLeaf,
      });
 };
 
-let toShape = (samplingInputs, node: node) => {
+let toShape = (samplingInputs, environment, node: node) => {
   let renderResult =
-    `Render(`Normalize(node))
-    |> toLeaf(samplingInputs);
+    `Render(`Normalize(node)) |> toLeaf(samplingInputs, environment);
 
   switch (renderResult) {
   | Ok(`RenderedDist(shape)) => Ok(shape)

src/distPlus/expressionTree/ExpressionTreeEvaluator.re

@@ -335,6 +335,7 @@ let toLeaf =
   | `Normalize(t) => Normalize.operationToLeaf(evaluationParams, t)
   | `Render(t) => Render.operationToLeaf(evaluationParams, t)
   | `Function(t) => Ok(`Function(t))
+  | `Symbol(r) => ExpressionTypes.ExpressionTree.Environment.get(evaluationParams.environment, r) |> E.O.toResult("Undeclared variable " ++ r)
   | `CallableFunction(name, args) =>
     callableFunction(evaluationParams, name, args)
   };

src/distPlus/expressionTree/ExpressionTypes.re

@@ -22,6 +22,7 @@ module ExpressionTree = {
     | `FloatFromDist(distToFloatOperation, node)
     | `Function(node => result(node, string))
     | `CallableFunction(string, array(node))
+    | `Symbol(string)
   ];
 
   type samplingInputs = {
@@ -31,8 +32,18 @@ module ExpressionTree = {
     shapeLength: int
   };
 
+  type environment = Belt.Map.String.t(node);
+
+  module Environment = {
+    type t = environment
+    let empty:t = [||]->Belt.Map.String.fromArray
+    let update = (t,str, fn) => Belt.Map.String.update(t, str, fn)
+    let get = (t,str) => Belt.Map.String.get(t, str)
+  }
+
   type evaluationParams = {
     samplingInputs,
+    environment,
     evaluateNode: (evaluationParams, node) => Belt.Result.t(node, string),
   };
 

src/distPlus/expressionTree/MathJsParser.re

@@ -8,7 +8,7 @@ module MathJsonToMathJsAdt = {
     | Array(array(arg))
     | Blocks(array(arg))
     | Object(Js.Dict.t(arg))
-    | Assignment(arg,arg)
+    | Assignment(arg, arg)
   and fn = {
     name: string,
     args: array(arg),
@@ -44,19 +44,17 @@ module MathJsonToMathJsAdt = {
         let items = field("items", array(run), j);
         Some(Array(items |> E.A.O.concatSomes));
       | "SymbolNode" => Some(Symbol(field("name", string, j)))
-      | "AssignmentNode" => {
+      | "AssignmentNode" =>
         let object_ = j |> field("object", run);
         let value_ = j |> field("value", run);
-        switch(object_, value_){
-          | (Some(o), Some(v)) => Some(Assignment(o,v))
+        switch (object_, value_) {
+        | (Some(o), Some(v)) => Some(Assignment(o, v))
         | _ => None
-        }
-      }
-      | "BlockNode" => {
+        };
+      | "BlockNode" =>
         let block = r => r |> field("node", run);
         let args = j |> field("blocks", array(block)) |> E.A.O.concatSomes;
-          Some(Blocks(args))
-      }
+        Some(Blocks(args));
       | n =>
         Js.log3("Couldn't parse mathjs node", j, n);
         None;
@@ -68,10 +66,7 @@ module MathAdtToDistDst = {
   open MathJsonToMathJsAdt;
 
   let handleSymbol = (inputVars: inputVars, sym) => {
-    switch (Belt.Map.String.get(inputVars, sym)) {
-    | Some(s) => Ok(s)
-    | None => Error("Couldn't find symbol " ++ sym)
-    };
+    Ok(`Symbol(sym))
   };
 
   module MathAdtCleaner = {
@@ -100,7 +95,7 @@ module MathAdtToDistDst = {
       | Symbol(s) => Symbol(s)
       | Value(v) => Value(v)
       | Blocks(args) => Blocks(args |> E.A.fmap(run))
-      | Assignment(a,b) => Assignment(a,run(b))
+      | Assignment(a, b) => Assignment(a, run(b))
       | Object(v) =>
         Object(
           v
@@ -122,7 +117,10 @@ module MathAdtToDistDst = {
         )
       | (_, _, Ok(mu), Ok(sigma)) =>
         Ok(`CallableFunction(("lognormal", [|mu, sigma|])))
-      | _ => Error("Lognormal distribution needs either mean and stdev or mu and sigma")
+      | _ =>
+        Error(
+          "Lognormal distribution needs either mean and stdev or mu and sigma",
+        )
       };
     | _ =>
       parseArgs()
@@ -293,25 +291,40 @@ module MathAdtToDistDst = {
     inputVars =>
       fun
       | Value(f) => Ok(`SymbolicDist(`Float(f)))
-      | Symbol(s) => handleSymbol(inputVars, s)
+      | Symbol(sym) => Ok(`Symbol(sym))
       | Fn({name, args}) =>
         functionParser(nodeParser(inputVars), name, args)
       | _ => {
           Error("This type not currently supported");
         };
 
-  let rec topLevel = inputVars =>
-    fun
-    | Value(_) as r => nodeParser(inputVars, r)
-    | Fn(_) as r => nodeParser(inputVars, r)
+  let rec topLevel =
+          (inputVars: inputVars, r)
+          : result(ExpressionTypes.Program.program, string) =>
+    switch (r) {
+    | Value(_) as r =>
+      nodeParser(inputVars, r) |> E.R.fmap(r => [|`Expression(r)|])
+    | Fn(_) as r =>
+      nodeParser(inputVars, r) |> E.R.fmap(r => [|`Expression(r)|])
     | Array(_) => Error("Array not valid as top level")
-    | Symbol(s) => handleSymbol(inputVars, s)
+    | Symbol(s) =>
+      handleSymbol(inputVars, s) |> E.R.fmap(r => [|`Expression(r)|])
     | Object(_) => Error("Object not valid as top level")
-    | Assignment(_) => Error("Assignment not valid as top level")
-    | Blocks(blocks) => E.A.last(blocks) |> E.O.toResult("no blocks listed") |> E.R.bind(_, topLevel(inputVars))
+    | Assignment(name, value) =>
+      switch (name) {
+      | Symbol(symbol) =>
+        nodeParser(inputVars, value)
+        |> E.R.fmap(r => [|`Assignment((symbol, r))|])
+      | _ => Error("Symbol not a string")
+      }
+    | Blocks(blocks) =>
+      blocks
+      |> E.A.fmap(b => topLevel(inputVars, b))
+      |> E.A.R.firstErrorOrOpen
+      |> E.R.fmap(E.A.concatMany)
+    };
 
-  let run =
-      (inputVars, r): result(ExpressionTypes.ExpressionTree.node, string) =>
+  let run = (inputVars, r): result(ExpressionTypes.Program.program, string) =>
     r |> MathAdtCleaner.run |> topLevel(inputVars);
 };
 

src/distPlus/renderers/DistPlusRenderer.re

@@ -31,29 +31,31 @@ module Inputs = {
       unit,
     };
   };
+
   type inputs = {
     distPlusIngredients: ingredients,
     samplingInputs: SamplingInputs.t,
-    inputVariables: Belt.Map.String.t(ExpressionTypes.ExpressionTree.node),
+    environment: ExpressionTypes.ExpressionTree.environment
   };
+
   let empty: SamplingInputs.t = {
     sampleCount: None,
     outputXYPoints: None,
     kernelWidth: None,
-    shapeLength: None
+    shapeLength: None,
   };
 
   let make =
       (
         ~samplingInputs=empty,
         ~distPlusIngredients,
-        ~inputVariables=[||]->Belt.Map.String.fromArray,
+        ~environment=ExpressionTypes.ExpressionTree.Environment.empty,
         (),
       )
       : inputs => {
     distPlusIngredients,
     samplingInputs,
-    inputVariables,
+    environment,
   };
 };
 
@@ -61,14 +63,27 @@ module Internals = {
   type inputs = {
     samplingInputs: Inputs.SamplingInputs.t,
     guesstimatorString: string,
-    inputVariables: Belt.Map.String.t(ExpressionTypes.ExpressionTree.node),
+    environment: ExpressionTypes.ExpressionTree.environment,
+  };
+
+  let addVariable =
+      (
+        {samplingInputs, guesstimatorString, environment}: inputs,
+        str,
+        node,
+      )
+      : inputs => {
+    samplingInputs,
+    guesstimatorString,
+    environment:
+    ExpressionTypes.ExpressionTree.Environment.update(environment, str, _ => Some(node))
   };
 
   let distPlusRenderInputsToInputs = (inputs: Inputs.inputs): inputs => {
     {
       samplingInputs: inputs.samplingInputs,
       guesstimatorString: inputs.distPlusIngredients.guesstimatorString,
-      inputVariables: inputs.inputVariables,
+      environment: inputs.environment,
     };
   };
 
@@ -78,27 +93,46 @@ module Internals = {
   };
   let makeOutputs = (graph, shape): outputs => {graph, shape};
 
-  let inputsToShape = (inputs: inputs) => {
-    MathJsParser.fromString(inputs.guesstimatorString, inputs.inputVariables)
-    |> E.R.bind(_, g =>
+  let runNode = (inputs, node) => {
+    Js.log2("Inputs", inputs);
     ExpressionTree.toShape(
       {
-             sampleCount:
-               inputs.samplingInputs.sampleCount |> E.O.default(10000),
+        sampleCount: inputs.samplingInputs.sampleCount |> E.O.default(10000),
         outputXYPoints:
           inputs.samplingInputs.outputXYPoints |> E.O.default(10000),
         kernelWidth: inputs.samplingInputs.kernelWidth,
-             shapeLength: inputs.samplingInputs.shapeLength |> E.O.default(10000)
+        shapeLength: inputs.samplingInputs.shapeLength |> E.O.default(10000),
       },
-           g,
-         )
-         |> E.R.fmap(makeOutputs(g))
+      inputs.environment,
+      node,
     );
   };
 
-  let outputToDistPlus = (inputs: Inputs.inputs, outputs: outputs) => {
+  let runProgram = (inputs: inputs, p: ExpressionTypes.Program.program) => {
+    let ins = ref(inputs);
+    p
+    |> E.A.fmap(statement =>
+         switch (statement) {
+         | `Assignment(name, node) =>
+           ins := addVariable(ins^, name, node);
+           Js.log4("HIHI", ins, name, node);
+           None;
+         | `Expression(node) => Some(runNode(ins^, node))
+         }
+       )
+    |> E.A.O.concatSomes
+    |> E.A.R.firstErrorOrOpen;
+  };
+
+  let inputsToShape = (inputs: inputs) => {
+    MathJsParser.fromString(inputs.guesstimatorString, inputs.environment)
+    |> E.R.bind(_, g => runProgram(inputs, g))
+    |> E.R.bind(_, r => E.A.last(r) |> E.O.toResult("sdf"));
+  };
+
+  let outputToDistPlus = (inputs: Inputs.inputs, shape: DistTypes.shape) => {
     DistPlus.make(
-      ~shape=outputs.shape,
+      ~shape,
       ~domain=inputs.distPlusIngredients.domain,
       ~unit=inputs.distPlusIngredients.unit,
       ~guesstimatorString=Some(inputs.distPlusIngredients.guesstimatorString),