Add the ability for error to throw an error object

Author: TotalTechGeek

defaultMethods.js

@@ -1,3 +1,4 @@
+/* eslint-disable no-throw-literal */
 // @ts-check
 'use strict'
 
@@ -114,7 +115,9 @@ const defaultMethods = {
     return res
   },
   error: (type) => {
-    throw new Error(type)
+    if (Array.isArray(type)) type = type[0]
+    if (typeof type === 'object') throw type
+    throw { error: type }
   },
   max: (data) => Math.max(...data),
   min: (data) => Math.min(...data),
@@ -342,7 +345,7 @@ const defaultMethods = {
       for (let i = 0; i < arr.length; i++) {
         try {
           // Todo: make this message thing more robust.
-          if (lastError) item = engine.run(arr[i], { error: lastError.message || lastError.constructor.name }, { above: [null, _1, _2] })
+          if (lastError) item = engine.run(arr[i], { error: lastError.error || lastError.message || lastError.constructor.name }, { above: [null, _1, _2] })
           else item = executeInLoop ? engine.run(arr[i], _1, { above: _2 }) : arr[i]
           return item
         } catch (e) {
@@ -363,7 +366,7 @@ const defaultMethods = {
       for (let i = 0; i < arr.length; i++) {
         try {
           // Todo: make this message thing more robust.
-          if (lastError) item = await engine.run(arr[i], { error: lastError.message || lastError.constructor.name }, { above: [null, _1, _2] })
+          if (lastError) item = await engine.run(arr[i], { error: lastError.error || lastError.message || lastError.constructor.name }, { above: [null, _1, _2] })
           else item = executeInLoop ? await engine.run(arr[i], _1, { above: _2 }) : arr[i]
           return item
         } catch (e) {

suites/try.json

@@ -122,6 +122,30 @@
         "result": "NaN",
         "data": null
     },
+    {
+        "description": "Handles NaN Explicitly",
+        "rule": {
+            "try": [
+                { "if": [{ "/": [1, { "val": "x" }] }, { "error": "Some error" }, null] },
+                {
+                    "if": [{ "===": [{ "val": "error" }, "NaN"]}, "Handled", { "error": { "val": [] } }]
+                }
+            ]
+        },
+        "result": "Handled",
+        "data": { "x": 0 }
+    },
+    {
+        "description": "Did not NaN, so it errored",
+        "rule": {
+            "try": [
+                { "if": [{ "/": [1, { "val": "x" }] }, { "error": "Some error" }, null] },
+                { "if": [{ "===": [{ "val": "error" }, "NaN"]}, "Handled", { "error": { "val": [] } }] }
+            ]
+        },
+        "error": true,
+        "data": { "x": 1 }
+    },
     "# Not Proposed",
     {
         "description": "Try can work further up the AST with Exceptions; Grabbing other Context value",