babel/CHANGELOG.md
2016-07-06 19:40:51 -04:00

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# Changelog
> **Tags:**
> - [Breaking Change]
> - [Spec Compliancy]
> - [New Feature]
> - [Bug Fix]
> - [Documentation]
> - [Internal]
> - [Polish]
_Note: Gaps between patch versions are faulty, broken or test releases._
See the [Babel Changelog](https://github.com/babel/babel/blob/master/CHANGELOG.md) for the pre-6.8.0 version changelog.
## 6.8.4 (2016-07-06)
### Bug Fixes
- Fix the location of params, when flow and default value used (#68) Fixes #67 @danez
## 6.8.3 (2016-07-02)
### Bug Fixes
- Fix performance regression introduced in 6.8.2 with conditionals [#63](https://github.com/babel/babylon/pull/63) @danez
## 6.8.2 (2016-06-24)
### Bug Fixes
- Fix parse error with yielding jsx elements in generators `function* it() { yield <a></a>; }`
- When cloning nodes do not clone its comments
- Fix parse errors when using arrow functions with an spread element and return type `(...props): void => {}`
- Fix leading comments added from previous node
- Fix parse errors with flow's optional arguments `(arg?) => {}`
- Support negative numeric type literals
- Remove line terminator restriction after await keyword
- Remove grouped type arrow restriction as it seems flow no longer has it
- Fix parse error with generic methods that have the name `get` or `set` `class foo { get() {} }`
- Fix parse error with arrow functions that have flow type parameter declarations `<T>(x: T): T => x;`
### Documentation
- Document AST differences from ESTree
- Move ast spec from babel/babel
### Internal
- Enable skipped tests
- Add script to test latest version of babylon with babel
- Upgrade test runner ava
- Add missing generate-identifier-regex script
- Rename parser context types
- Add node v6 to travis testing
- Update to Unicode v9
## 6.8.1 (2016-06-06)
### New Feature
- Parse type parameter declarations with defaults like `type Foo<T = string> = T`
### Bug Fixes
- Type parameter declarations need 1 or more type parameters.
- The existential type `*` is not a valid type parameter.
- The existential type `*` is a primary type
### Spec Compliancy
- The param list for type parameter declarations now consists of `TypeParameter` nodes
- New `TypeParameter` AST Node (replaces using the `Identifier` node before)
```
interface TypeParameter <: Node {
bound: TypeAnnotation;
default: TypeAnnotation;
name: string;
variance: "plus" | "minus";
}
```
## 6.8.0 (2016-05-02)
#### New Feature
##### Parse Method Parameter Decorators ([#12](https://github.com/babel/babylon/pull/12))
> [Method Parameter Decorators](https://goo.gl/8MmCMG) is now a TC39 [stage 0 proposal](https://github.com/tc39/ecma262/blob/master/stage0.md).
Examples:
```js
class Foo {
constructor(@foo() x, @bar({ a: 123 }) @baz() y) {}
}
export default function func(@foo() x, @bar({ a: 123 }) @baz() y) {}
var obj = {
method(@foo() x, @bar({ a: 123 }) @baz() y) {}
};
```
##### Parse for-await statements (w/ `asyncGenerators` plugin) ([#17](https://github.com/babel/babylon/pull/17))
There is also a new node type, `ForAwaitStatement`.
> [Async generators and for-await](https://github.com/tc39/proposal-async-iteration) are now a [stage 2 proposal](https://github.com/tc39/ecma262#current-proposals).
Example:
```js
async function f() {
for await (let x of y);
}
```