Add another check, and throws

Author: TotalTechGeek

defaultMethods.js

@@ -94,6 +94,12 @@ const defaultMethods = {
     if (type === 'NaN') return Number.NaN
     return { error: type }
   },
+  throws: (item) => {
+    if (Array.isArray(item)) item = item[0]
+    if (Number.isNaN(item)) throw new Error('NaN was returned from expression')
+    if (item && item.error) throw item.error
+    return item
+  },
   max: (data) => Math.max(...data),
   min: (data) => Math.min(...data),
   in: ([item, array]) => (array || []).includes(item),
@@ -962,7 +968,7 @@ defaultMethods['!!'].compile = function (data, buildState) {
 defaultMethods.none.deterministic = defaultMethods.some.deterministic
 
 // @ts-ignore Allowing a optimizeUnary attribute that can be used for performance optimizations
-defaultMethods['+'].optimizeUnary = defaultMethods['-'].optimizeUnary = defaultMethods['!'].optimizeUnary = defaultMethods['!!'].optimizeUnary = defaultMethods.cat.optimizeUnary = defaultMethods.error.optimizeUnary = true
+defaultMethods['+'].optimizeUnary = defaultMethods['-'].optimizeUnary = defaultMethods['!'].optimizeUnary = defaultMethods['!!'].optimizeUnary = defaultMethods.cat.optimizeUnary = defaultMethods.error.optimizeUnary = defaultMethods.throws.optimizeUnary = true
 
 export default {
   ...defaultMethods,

suites/plus.json

@@ -158,5 +158,11 @@
         "rule": { "+": [[1], 1] },
         "result": { "error": "NaN" },
         "data": null
+    },
+    {
+        "description": "Addition with Object produces NaN",
+        "rule": { "+": [{ "val": "x" }, 1] },
+        "result": { "error": "NaN" },
+        "data": { "x": {} }
     }
 ]