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feat(ivy): add ngcc ivy switch (#25238)

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Provides a runtime and compile time switch for ivy including
`ApplicationRef.bootstrapModule`.

This is done by naming the symbols such that `ngcc` (angular
Compatibility compiler) can rename symbols in such a way that running
`ngcc` command will switch the `@angular/core` module from `legacy` to
`ivy` mode.

This is done as follows:

```
const someToken__PRE_NGCC__ = ‘legacy mode’;
const someToken__POST_NGCC__ = ‘ivy mode’;

export someSymbol = someToken__PRE_NGCC__;
```

The `ngcc` will search for any token which ends with `__PRE_NGCC__`
and replace it with `__POST_NGCC__`. This allows the `@angular/core`
package to be rewritten to ivy mode post `ngcc` execution.

PR Close #25238
This commit is contained in:
Misko Hevery
2018-07-30 22:34:15 -07:00
committed by Jason Aden
parent cc55d609ce
commit 503905c807
23 changed files with 298 additions and 201 deletions
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7
packages/core/src/metadata/directives.ts
View File

@ -347,7 +347,7 @@ export interface Directive {
*/
export const Directive: DirectiveDecorator = makeDecorator(
'Directive', (dir: Directive = {}) => dir, undefined, undefined,
(type: Type<any>, meta: Directive) => (R3_COMPILE_DIRECTIVE || (() => {}))(type, meta));
(type: Type<any>, meta: Directive) => R3_COMPILE_DIRECTIVE(type, meta));
/**
* Component decorator interface
@ -631,8 +631,7 @@ export interface Component extends Directive {
*/
export const Component: ComponentDecorator = makeDecorator(
'Component', (c: Component = {}) => ({changeDetection: ChangeDetectionStrategy.Default, ...c}),
Directive, undefined,
(type: Type<any>, meta: Component) => (R3_COMPILE_COMPONENT || (() => {}))(type, meta));
Directive, undefined, (type: Type<any>, meta: Component) => R3_COMPILE_COMPONENT(type, meta));
/**
* Type of the Pipe decorator / constructor function.
@ -680,7 +679,7 @@ export interface Pipe {
*/
export const Pipe: PipeDecorator = makeDecorator(
'Pipe', (p: Pipe) => ({pure: true, ...p}), undefined, undefined,
(type: Type<any>, meta: Pipe) => (R3_COMPILE_PIPE || (() => {}))(type, meta));
(type: Type<any>, meta: Pipe) => R3_COMPILE_PIPE(type, meta));
/**