Pete Bacon Darwin d7440c452a fix(ngcc): ensure reflection hosts can handle TS 3.9 IIFE wrapped classes (#36989)
In TS 3.9, ES2015 output can contain ES classes that are wrapped in an
IIFE. So now ES2015 class declarations can look like one of:

```
class OuterClass1 {}
```

```
let OuterClass = class InnerClass {};
```

```
var AliasClass;
let OuterClass = AliasClass = class InnerClass {};
```

```
let OuterClass = (() => class InnerClass {}};
```

```
var AliasClass;
let OuterClass = AliasClass = (() => class InnerClass {})();
```

```
let OuterClass = (() => {
  let AdjacentClass = class InnerClass {};
  // ... static properties or decorators attached to `AdjacentClass`
  return AdjacentClass;
})();
```

```
var AliasClass;
let OuterClass = AliasClass = (() => {
  let AdjacentClass = class InnerClass {};
  // ... static properties or decorators attached to `AdjacentClass`
  return AdjacentClass;
})();
```

The `Esm5ReflectionHost` already handles slightly different IIFE wrappers
around function-based classes. This can be substantially reused when
fixing `Esm2015ReflectionHost`, since there is a lot of commonality
between the two.

This commit moves code from the `Esm5ReflectionHost` into the `Esm2015ReflectionHost`
and looks to share as much as possible between the two hosts.

PR Close #36989
2020-05-14 10:50:29 -07:00
..
2020-01-13 07:21:43 -08:00

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