@babel/helper-member-expression-to-functions - npm Package Compare versions

Comparing version 7.0.0-beta.47 to 7.0.0-beta.48

lib/index.js

@@ -11,3 +11,3 @@ "use strict";
 
-  t = function t() {
+  t = function () {
     return data;
@@ -21,7 +21,46 @@ };
 
+class AssignmentMemoiser {
+  constructor() {
+    this._map = new WeakMap();
+  }
+
+  has(key) {
+    return this._map.has(key);
+  }
+
+  get(key) {
+    if (!this.has(key)) return;
+
+    const record = this._map.get(key);
+
+    const {
+      value
+    } = record;
+    record.count--;
+
+    if (record.count === 0) {
+      return t().assignmentExpression("=", value, key);
+    }
+
+    return value;
+  }
+
+  set(key, value, count) {
+    return this._map.set(key, {
+      count,
+      value
+    });
+  }
+
+}
+
 const handle = {
+  memoise() {},
+
   handle(member) {
-    const node = member.node,
-          parent = member.parent,
-          parentPath = member.parentPath;
+    const {
+      node,
+      parent,
+      parentPath
+    } = member;
 
@@ -31,9 +70,7 @@ if (parentPath.isUpdateExpression({
     })) {
-      const operator = parent.operator,
-            prefix = parent.prefix;
-
-      if (this.memoize) {
-        this.memoize(member);
-      }
-
+      const {
+        operator,
+        prefix
+      } = parent;
+      this.memoise(member, 2);
       const value = t().binaryExpression(operator[0], t().unaryExpression("+", this.get(member)), t().numericLiteral(1));
@@ -44,3 +81,5 @@
       } else {
-        const scope = member.scope;
+        const {
+          scope
+        } = member;
         const ref = scope.generateUidIdentifierBasedOnNode(node);
@@ -60,11 +99,10 @@ scope.push({
     })) {
-      const operator = parent.operator,
-            right = parent.right;
+      const {
+        operator,
+        right
+      } = parent;
       let value = right;
 
       if (operator !== "=") {
-        if (this.memoize) {
-          this.memoize(member);
-        }
-
+        this.memoise(member, 2);
         value = t().binaryExpression(operator.slice(0, -1), this.get(member), value);
@@ -80,3 +118,5 @@ }
     })) {
-      const args = parent.arguments;
+      const {
+        arguments: args
+      } = parent;
       parentPath.replaceWith(this.call(member, args));
@@ -92,3 +132,5 @@ return;
 function memberExpressionToFunctions(path, visitor, state) {
-  path.traverse(visitor, Object.assign({}, state, handle));
+  path.traverse(visitor, Object.assign({}, handle, state, {
+    memoiser: new AssignmentMemoiser()
+  }));
 }

package.json

 {
   "name": "@babel/helper-member-expression-to-functions",
-  "version": "7.0.0-beta.47",
+  "version": "7.0.0-beta.48",
   "description": "Helper function to replace certain member expressions with function calls",
@@ -10,4 +10,4 @@ "repository": "https://github.com/babel/babel/tree/master/packages/babel-helper-member-expression-to-functions",
   "dependencies": {
-    "@babel/types": "7.0.0-beta.47"
+    "@babel/types": "7.0.0-beta.48"
   }
 }

README.md

@@ -29,3 +29,3 @@ # @babel/helper-member-expression-to-functions
 // `call`.
-// Optionally, a special `memoize` method may be defined, which gets
+// Optionally, a special `memoise` method may be defined, which gets
 // called if the member is in a self-referential update expression.
@@ -59,6 +59,6 @@ // Everything else will be passed through as normal.
 
-  memoize(memberPath) {
+  memoise(memberPath) {
     const { node } = memberPath;
     if (node.computed) {
-      MEMOIZED.set(node, ...);
+      MEMOISED.set(node, ...);
     }
@@ -65,0 +65,0 @@ },

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Improved metrics

Total package byte prevSize

5452

increased by9.24%

Lines of code

103

increased by51.47%

Dependency changes

• + Added@babel/types@7.0.0-beta.48(transitive)

• - Removed@babel/types@7.0.0-beta.47(transitive)

• Updated@babel/types@7.0.0-beta.48