node fixes, updates

1 files changed, 61 insertions, 0 deletions

diff --git a/node_modules/babel-plugin-transform-inline-consecutive-adds/lib/set-collapser.js b/node_modules/babel-plugin-transform-inline-consecutive-adds/lib/set-collapser.js
new file mode 100644
index 00000000..e4b37b31
--- /dev/null
+++ b/node_modules/babel-plugin-transform-inline-consecutive-adds/lib/set-collapser.js
@@ -0,0 +1,61 @@
+"use strict";
+
+const Collapser = require("./collapser");
+
+class SetCollapser extends Collapser {
+  isInitTypeValid(init) {
+    return init.isNewExpression() && init.get("callee").isIdentifier() && init.node.callee.name === "Set" && ( // other iterables might not be append-able
+    init.node.arguments.length === 0 || init.node.arguments.length === 1 && init.get("arguments")[0].isArrayExpression());
+  }
+
+  isExpressionTypeValid(expr) {
+    return expr.isCallExpression();
+  }
+
+  getExpressionChecker(objName, checkReference) {
+    return expr => {
+      // checks expr is of form:
+      // foo.add(rval)
+      const callee = expr.get("callee");
+
+      if (!callee.isMemberExpression()) {
+        return false;
+      }
+
+      const obj = callee.get("object"),
+            prop = callee.get("property");
+
+      if (!obj.isIdentifier() || obj.node.name !== objName || !prop.isIdentifier() || prop.node.name !== "add") {
+        return false;
+      }
+
+      const args = expr.get("arguments");
+
+      if (args.length !== 1) {
+        return false;
+      }
+
+      if (checkReference(args[0])) {
+        return false;
+      }
+
+      return true;
+    };
+  }
+
+  extractAssignment(expr) {
+    return expr.node.arguments[0];
+  }
+
+  addSuccessfully(t, arg, init) {
+    if (init.arguments.length === 0) {
+      init.arguments.push(t.arrayExpression());
+    }
+
+    init.arguments[0].elements.push(arg);
+    return true;
+  }
+
+}
+
+module.exports = SetCollapser;
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