* 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
Previously, all "bare imports" (e.g. `import './foo';`) were moved to the
end of the array of sources. I presume this was done to remove needless
variables in the callback signature.
Unfortunately, doing this actually changes the intent of the program.
Modules should be evaluated in the order that they were in the source.
In the case of a bare import, it is quite possible that the bare import
has side effects that a later required module should see. With the current
implementation the later imported modules are evaluated before that "side
effecty" module has been evaluated.
Obviously, it is better to avoid these sorts of side effect ridden modules
but even still you could imagine a similar issue with cycles.
This change ensures that module source order is preserved in the AMD
dependencies list, and avoids making needless variables as much as possible.
* Consolidate contiguous var declarations in destructuring transform
Fixes#3081.
* Simplify var node coalescing in es2015-destructuring
* Revert "Simplify var node coalescing in es2015-destructuring"
This reverts commit 15cb373f0726f68225f7080a7ae206a63af174ee.
* More careful condition for var coalescing in es2015-destructuring
* Flip default parameter template
YMMV, I saved ~10b on a 2kb library. Not noticeable at the small scale, by why not do it anyway?
I've (unscientifically) found that flipping the default parameter conditional yields better gzip results. I think this is due to the slightly longer string it can now repeatedly match:
```js
// old
var param = arguments.length <= 0 || void 0 === arguments[0] ? null : arguments[0]
--------------------------------------------------------------^
// new
var param = arguments.length > 1 && void 0 !== arguments[1] ? arguments[1] : null
------------------------------------------------------------------------^
```
Though it's entirely likely gzip will also choose up to the index of the arguments if you many default parameters at different indexes.
* Update tests
* fix default exported classes without a name
This correctly requeues class without name so the es3 transform can
transform the default keyword.
* Replace phabricator issue number with github
* Fix buildExportAll to account for commonjs/amd
If the re-exported module was generated with Babel and it is a commonjs or amd module and so is the current module, this will result in an attempt to redefine the __esModule property, which throws a runtime error.
* Add test: don't overwrite __esModule on re-export
(Failing.)
* fixup tests
* Add fix for systemjs
The untransformed `let` keyword causes problems for older parsers. I
understand using `let` instead of `var` ensures each getter function has
its own binding for the KEY variable, but the same can be accomplished
(with less code) using a `.forEach` callback function, and this way
there's no need to worry about generating a unique name for the `key`
variable.
