move location to Reducer_Peggy_Parse, separate parse errors

packages/squiggle-lang/__tests__/Reducer/Reducer_Peggy/Reducer_Peggy_TestHelpers.res

@@ -13,7 +13,7 @@ let expectParseToBe = (expr, answer) =>
 
 let testParse = (expr, answer) => test(expr, () => expectParseToBe(expr, answer))
 
-let expectToExpressionToBe = (expr, answer, ~v="_", ()) => {
+let expectExpressionToBe = (expr, answer, ~v="_", ()) => {
   let rExpr = Parse.parse(expr, "test")->Result.map(ToExpression.fromNode)
   let a1 = rExpr->ExpressionT.toStringResultOkless
 
@@ -22,7 +22,9 @@ let expectToExpressionToBe = (expr, answer, ~v="_", ()) => {
   } else {
     let a2 =
       rExpr
-      ->E.R2.errMap(e => e->Reducer_ErrorValue.attachEmptyStackTraceToErrorValue)
+      ->E.R2.errMap(e =>
+        e->Reducer_ErrorValue.fromParseError->Reducer_ErrorValue.attachEmptyStackTraceToErrorValue
+      )
       ->Result.flatMap(expr => Expression.BackCompatible.evaluate(expr))
       ->Reducer_Value.toStringResultOkless
     (a1, a2)->expect->toEqual((answer, v))
@@ -30,16 +32,16 @@ let expectToExpressionToBe = (expr, answer, ~v="_", ()) => {
 }
 
 let testToExpression = (expr, answer, ~v="_", ()) =>
-  test(expr, () => expectToExpressionToBe(expr, answer, ~v, ()))
+  test(expr, () => expectExpressionToBe(expr, answer, ~v, ()))
 
 module MyOnly = {
   let testParse = (expr, answer) => Only.test(expr, () => expectParseToBe(expr, answer))
   let testToExpression = (expr, answer, ~v="_", ()) =>
-    Only.test(expr, () => expectToExpressionToBe(expr, answer, ~v, ()))
+    Only.test(expr, () => expectExpressionToBe(expr, answer, ~v, ()))
 }
 
 module MySkip = {
   let testParse = (expr, answer) => Skip.test(expr, () => expectParseToBe(expr, answer))
   let testToExpression = (expr, answer, ~v="_", ()) =>
-    Skip.test(expr, () => expectToExpressionToBe(expr, answer, ~v, ()))
+    Skip.test(expr, () => expectExpressionToBe(expr, answer, ~v, ()))
 }

packages/squiggle-lang/src/rescript/ForTS/ForTS_Reducer_ErrorValue.res

@@ -1,6 +1,6 @@
 @genType type reducerError = Reducer_ErrorValue.error //alias
 @genType type reducerErrorValue = Reducer_ErrorValue.errorValue //alias
-@genType type location = Reducer_ErrorValue.location //alias
+@genType type location = Reducer_Peggy_Parse.location //alias
 
 @genType
 let toString = (e: reducerError): string => Reducer_ErrorValue.errorToString(e)

packages/squiggle-lang/src/rescript/Reducer/Reducer_ErrorValue.res

@@ -1,16 +1,4 @@
-// Do not gentype this, use LocationRange from peggy types instead
+type location = Reducer_Peggy_Parse.location
-// TODO - rename locationPoint -> location, location -> locationRange to match peggy
-@genType
-type locationPoint = {
-  line: int,
-  column: int,
-}
-@genType
-type location = {
-  source: string,
-  start: locationPoint,
-  end: locationPoint,
-}
 
 @genType.opaque
 type errorValue =
@@ -51,6 +39,10 @@ type error = {
 
 exception ExceptionWithStackTrace(error)
 
+let fromParseError = (
+  SyntaxError(message, location): Reducer_Peggy_Parse.parseError,
+) => RESyntaxError(message, location->Some)
+
 let errorValueToString = (err: errorValue) =>
   switch err {
   | REArityError(_oFnName, arity, usedArity) =>

packages/squiggle-lang/src/rescript/Reducer/Reducer_Expression/Reducer_Expression.res

@@ -125,7 +125,7 @@ let rec evaluate: T.reducerFn = (expression, context): (T.value, T.context) => {
 module BackCompatible = {
   // Those methods are used to support the existing tests
   // If they are used outside limited testing context, error location reporting will fail
-  let parse = (peggyCode: string): result<T.expression, errorValue> =>
+  let parse = (peggyCode: string): result<T.expression, Reducer_Peggy_Parse.parseError> =>
     peggyCode->Reducer_Peggy_Parse.parse("main")->Result.map(Reducer_Peggy_ToExpression.fromNode)
 
   let evaluate = (expression: T.expression): result<T.value, Reducer_ErrorValue.error> => {
@@ -144,6 +144,8 @@ module BackCompatible = {
 
   let evaluateString = (peggyCode: string): result<T.value, Reducer_ErrorValue.error> =>
     parse(peggyCode)
-    ->E.R2.errMap(e => e->Reducer_ErrorValue.attachEmptyStackTraceToErrorValue)
+    ->E.R2.errMap(e =>
+      e->Reducer_ErrorValue.fromParseError->Reducer_ErrorValue.attachEmptyStackTraceToErrorValue
+    )
     ->Result.flatMap(evaluate)
 }

packages/squiggle-lang/src/rescript/Reducer/Reducer_Expression/Reducer_Expression_T.res

@@ -31,30 +31,16 @@ let rec toString = (expression: t) =>
 let toStringResult = codeResult =>
   switch codeResult {
   | Ok(a) => `Ok(${toString(a)})`
-  | Error(m) => `Error(${Reducer_ErrorValue.errorValueToString(m)})`
+  | Error(m) => `Error(${Reducer_Peggy_Parse.toStringError(m)})`
   }
 
 let toStringResultOkless = codeResult =>
   switch codeResult {
   | Ok(a) => toString(a)
-  | Error(m) => `Error(${Reducer_ErrorValue.errorValueToString(m)})`
+  | Error(m) => `Error(${Reducer_Peggy_Parse.toStringError(m)})`
   }
 
 let inspect = (expr: t): t => {
   Js.log(toString(expr))
   expr
 }
-
-let inspectResult = (r: result<t, Reducer_ErrorValue.errorValue>): result<
-  t,
-  Reducer_ErrorValue.errorValue,
-> => {
-  Js.log(toStringResult(r))
-  r
-}
-
-let resultToValue = (rExpression: result<t, Reducer_ErrorValue.t>): t =>
-  switch rExpression {
-  | Ok(expression) => expression
-  | Error(errorValue) => Reducer_ErrorValue.toException(errorValue)
-  }

packages/squiggle-lang/src/rescript/Reducer/Reducer_Peggy/Reducer_Peggy_Parse.res

@@ -1,23 +1,39 @@
 module Extra = Reducer_Extra
-open Reducer_ErrorValue
 
-type node = {"type": string, "location": Reducer_ErrorValue.location}
+// Do not gentype this, use LocationRange from peggy types instead
+// TODO - rename locationPoint -> location, location -> locationRange to match peggy
+@genType
+type locationPoint = {
+  line: int,
+  column: int,
+}
+@genType
+type location = {
+  source: string,
+  start: locationPoint,
+  end: locationPoint,
+}
+
+type node = {"type": string, "location": location}
+
+type parseError = SyntaxError(string, location)
+
+type parseResult = result<node, parseError>
 
 @module("./Reducer_Peggy_GeneratedParser.js")
 external parse__: (string, {"grammarSource": string}) => node = "parse"
 
-type withLocation = {"location": Reducer_ErrorValue.location}
+type withLocation = {"location": location}
 external castWithLocation: Js.Exn.t => withLocation = "%identity"
 
-let syntaxErrorToLocation = (error: Js.Exn.t): Reducer_ErrorValue.location =>
+let syntaxErrorToLocation = (error: Js.Exn.t): location => castWithLocation(error)["location"]
-  castWithLocation(error)["location"]
 
-let parse = (expr: string, source: string): result<node, errorValue> =>
+let parse = (expr: string, source: string): parseResult =>
   try {
     Ok(parse__(expr, {"grammarSource": source}))
   } catch {
   | Js.Exn.Error(obj) =>
-    RESyntaxError(Belt.Option.getExn(Js.Exn.message(obj)), syntaxErrorToLocation(obj)->Some)->Error
+    SyntaxError(Belt.Option.getExn(Js.Exn.message(obj)), syntaxErrorToLocation(obj))->Error
   }
 
 type nodeBlock = {...node, "statements": array<node>}
@@ -154,8 +170,13 @@ let rec pgToString = (ast: ast): string => {
 }
 and toString = (node: node): string => node->nodeToAST->pgToString
 
-let toStringResult = (rNode: result<node, errorValue>): string =>
+let toStringError = (error: parseError): string => {
+  let SyntaxError(message, _) = error
+  `Syntax Error: ${message}}`
+}
+
+let toStringResult = (rNode: parseResult): string =>
   switch rNode {
-  | Ok(node) => toString(node)
+  | Ok(node) => node->toString
-  | Error(error) => `Error(${errorValueToString(error)})`
+  | Error(error) => `Error(${error->toStringError})`
   }

packages/squiggle-lang/src/rescript/ReducerProject/ReducerProject_ProjectItem.res

@@ -152,7 +152,10 @@ let parseIncludes = (this: t): t => {
   }
 }
 let doRawParse = (this: t): T.rawParseArgumentType =>
-  this->getSource->Reducer_Peggy_Parse.parse(this.sourceId)
+  this
+  ->getSource
+  ->Reducer_Peggy_Parse.parse(this.sourceId)
+  ->E.R2.errMap(Reducer_ErrorValue.fromParseError)
 
 let rawParse = (this: t): t =>
   this->getRawParse->E.O2.defaultFn(() => doRawParse(this))->setRawParse(this, _)