leonsenft f19bbe59dd refactor(compiler): support passing content to specific foreign component props ...

Add `@content(propName)` blocks for passing template content to foreign
component properties by name. Previously, only a single set of direct children
could be passed to a foreign component via the default `children` property.
With this change, developers can project distinct template content to multiple
specific properties on the foreign component:

```html
<FancyButton [label]="title">
  @content(icon) {
    <span>Icon</span>
  }
  @content(description) {
    <span>Description text</span>
  }
  <span>Other children</span>
</FancyButton>
```

Specifically:
- Add support to the HTML lexer for `@content` blocks.
- Introduce `ContentBlock` AST node to represent `@content` blocks.
- Implement validation ensuring `@content` blocks have exactly one parameter
  representing a valid JS identifier.
- Throw an error during ingestion if a `@content` block is placed anywhere
  other than as a direct child of a foreign component.
- Map `@content` blocks to properties of the props object passed to
  `ɵɵforeignComponent`.
- Update compliance and unit tests to cover these changes.
```

2026-06-05 12:46:32 -07:00

..

expression.ts

refactor(compiler): support passing content to specific foreign component props

2026-06-05 12:46:32 -07:00