[new] - Implement BinaryExpression expression handler.

Author: beefancohen

src/util/values/expressions/BinaryExpression.js

@@ -0,0 +1,66 @@
+'use strict';
+
+import getValue from './index';
+
+
+
+/**
+ * Extractor function for a BinaryExpression type value node.
+ * A binary expression has a left and right side separated by an operator
+ * such as `a + b`.
+ *
+ * @param - value - AST Value object with type `BinaryExpression`
+ * @returns - The extracted value converted to correct type.
+ */
+export default function extractValueFromBinaryExpression(value) {
+  const { operator, left, right } = value;
+  const leftVal = getValue(left);
+  const rightVal = getValue(right);
+
+  switch (operator) {
+    case '==':
+      return leftVal == rightVal;
+    case '!=':
+      return leftVal != rightVal;
+    case '===':
+      return leftVal === rightVal;
+    case '!==':
+      return leftVal !== rightVal;
+    case '<':
+      return leftVal < rightVal;
+    case '<=':
+      return leftVal <= rightVal;
+    case '>':
+      return leftVal > rightVal;
+    case '>=':
+      return leftVal >= rightVal;
+    case '<<':
+      return leftVal << rightVal;
+    case '>>':
+      return leftVal >> rightVal;
+    case '>>>':
+      return leftVal >>> rightVal;
+    case '+':
+      return leftVal + rightVal;
+    case '-':
+      return leftVal - rightVal;
+    case '*':
+      return leftVal * rightVal;
+    case '/':
+      return leftVal / rightVal;
+    case '%':
+      return leftVal % rightVal;
+    case '|':
+      return leftVal | rightVal;
+    case '^':
+      return leftVal ^ rightVal;
+    case '&':
+      return leftVal & rightVal;
+    case 'in':
+      return leftVal in rightVal;
+    case 'instanceof':
+      return leftVal instanceof rightVal;
+    default:
+      return undefined;
+  }
+}