💯 Add ::Sum and sum operator

src/components/Interpreter/modules/Reducers/Sum/doc.md

@@ -0,0 +1,11 @@
+# Sum
+
+Sum returns the sum of the provided tensor
+
+```L1
+::Sum
+sum-1: Sum 1 ; sum-1 = 1
+sum-2: Sum [1 2 3] ; sum-2 = 6
+sum-3: +[1 2 3] ; sum-3 = 6
+sum-4: +[1 2, 3 4] ; sum-4 = 10
+```

src/components/Interpreter/modules/Reducers/Sum/index.js

@@ -0,0 +1,11 @@
+import * as tf from "@tensorflow/tfjs-core"
+import { of } from "rxjs"
+
+import Symbols from "../../../symbols"
+
+import doc from "./doc.md"
+
+export default {
+    [Symbols.call]: (tensor) => of(tf.sum(tensor)),
+    [Symbols.doc]: doc
+}

src/components/Interpreter/modules/Reducers/index.js

@@ -1,7 +1,8 @@
 import Min from "./Min"
 import Max from "./Max"
 import Mean from "./Mean"
+import Sum from "./Sum"
 
 export default {
-    Min, Max, Mean
+    Min, Max, Mean, Sum
 }

src/components/Interpreter/modules/TensorOperators/index.js

@@ -3,7 +3,12 @@ import * as tf from "@tensorflow/tfjs"
 const binarize = (fn) => (({ a, b }) => fn(a, b))
 
 export default {
-    "+": binarize(tf.add),
+    "+": ({a, b}) => {
+        if (a === undefined) {
+            return tf.sum(b)
+        }
+        return tf.add(a, b)
+    },
     "-": ({a, b}) => {
         if (a === undefined) {
             return tf.neg(b)

src/components/Parser/grammar.ohm

@@ -25,6 +25,7 @@ L1 {
     Addition
         = (Addition ("+"|"-") Multiplication) -- binary
         | Multiplication -- fallthrough
+        | "+" Multiplication -- sum
         | "-" Multiplication -- negative
     Multiplication
         = (Multiplication ("*"|"×"|"/"|"÷"|"%"|"@"|"⊗") Exponentiation) -- binary

src/components/Parser/semantics.js

@@ -128,6 +128,7 @@ const semantics = {
             }
         },
         Addition_negative: function(op, v) { return unaryOperation(op, v, this.source) },
+        Addition_sum: function(op, v) { return unaryOperation(op, v, this.source) },
         Multiplication_reciprocal: function(op, v) { return unaryOperation(op, v, this.source) },
         PrimitiveExpression_magic: function(op, v) { return unaryOperation(op, v, this.source) },
         PrimitiveExpression_paren: function(_, v, __) { return v.eval() },