* parse async do expressions
* add test cases
* update test fixtures
* chore: add syntax-async-do-expressions
* generater support
* fix: do not transform async do expressions
* chore: add asyncDoExpressions to missing plugin helpers
* update ast types
* add more test cases
* throw when asyncDoExpressions is enabled but not doExpressions
* avoid add parentheses for async do expressions
* address review comments
* chore: update parser typings
This is a mix of changes, most importantly:
- Always print parens when mixing nullish coalescing and another logical
- Fixes assignment in the callee of an optional chain, which now blocks #11248
Also, cleans up a bit of code, and removes an unnecessary parens around `class A extends new B {}`
* Added precedence for nullish-coalescing-operator
* Made precedence equal to logical OR
* Renamed the folders made for testing
* Fixed the output test file of nullish-coalescing op
* ♻️ added condition to check for left and right of nullish coalescing operator and if any is a logical expression without a paren then throw an error
* 🐛 bugs fixed and test cases updated for babel parser
* ♻️ code comments added
* 🐛 spell error rectified
* ♻️ failing test updated
* 🐛 push tests after make build
* Skip nullish-coalescing flow precedence tests
They're now incorrect
* ♻️ error message updated, binop priority of other logical operators +1 from ?? and
* ♻️ increaed the binOp for in and instanceOf, added logic to print the brackets in an ?? && || expression, test cases added
* 🐛 failing test fixed and comments updated
* ♻️ new lines added between tests
* ♻️ basic tests for checking the binOp of instanceOf, in and relational operators to be equal added
* ♻️ new lines added in between tests
* Support internalSlots to babel-types and babel-generator
* Parsing support for internal slot properties
* Print internal slots in babel-generator
* Add whitespace before first internal slot property
The code
```js
linesInfo && linesInfo[type]
```
performs a lot of dynamic lookups on the `Boolean.prototype`, as the
*ToBoolean* operation let's `true` pass for `linesInfo` (which might
itself be concerning that this can be a boolean). Instead of the
coercion, the code should properly check for valid objects via `typeof`
and strict equality with `null` comparison.
This is a non-breaking performance fix.
* babel-generator: Add TypeScript support
* Remove type declarations; not published from babylon
* Remove TODOs
* Consistently use `this.word` for tokens that are words
* Remove whitespace generation and rely on default printing
Changes to printing:
* Add newline after last empty SwitchCase
* Add newlines around block comments if they are non-flow comments or contain newlines
* Fix a few more fixtures
* Wrap an arrow function in parentheses if it the test of a conditional expression
Fixes#5819
* Use ConditionalExpresion to check if () => {} should be wrapped
* Move `t.isTaggedTemplateExpression()` from ArrowFunctionExpression to
ConditionalExpresion
* [test] `await (() => {})` needs the parentheses
* [test] (a ? b : c)`` needs the parentheses
