Indirect eval

packages/babel-plugin-transform-pipeline-operator/src/index.js

@@ -7,7 +7,9 @@ export default function({ types: t }) {
     visitor: {
       BinaryExpression(path) {
         const { scope } = path;
-        const { operator, left, right } = path.node;
+        const { node } = path;
+        const { operator, left } = node;
+        let { right } = node;
         if (operator !== "|>") return;
 
         let optimizeArrow =
@@ -21,6 +23,8 @@ export default function({ types: t }) {
           } else if (params.length > 1) {
             optimizeArrow = false;
           }
+        } else if (t.isIdentifier(right, { name: "eval" })) {
+          right = t.sequenceExpression([t.numericLiteral(0), right]);
         }
 
         if (optimizeArrow && !param) {

packages/babel-plugin-transform-pipeline-operator/test/fixtures/pipeline-operator/indirect-eval/actual.js

@@ -0,0 +1,7 @@
+(function() {
+  'use strict';
+  var result = '(function() { return this; })()'
+    |> eval;
+
+  assert.notEqual(result, undefined);
+})();

packages/babel-plugin-transform-pipeline-operator/test/fixtures/pipeline-operator/indirect-eval/exec.js

@@ -0,0 +1,7 @@
+(function() {
+  'use strict';
+  var result = '(function() { return this; })()'
+    |> eval;
+
+  assert.notEqual(result, undefined);
+})();

packages/babel-plugin-transform-pipeline-operator/test/fixtures/pipeline-operator/indirect-eval/expected.js

@@ -0,0 +1,8 @@
+(function () {
+  'use strict';
+
+  var _functionReturn;
+
+  var result = (_functionReturn = '(function() { return this; })()', (0, eval)(_functionReturn));
+  assert.notEqual(result, undefined);
+})();