
Recently it was made possible to have a directive without selector, which are referred to as abstract directives. Such directives should not be registered in an NgModule, but can still contain decorators for inputs, outputs, queries, etc. The information from these decorators and the `@Directive()` decorator itself needs to be registered with the central `MetadataRegistry` so that other areas of the compiler can request information about a given directive, an example of which is the template type checker that needs to know about the inputs and outputs of directives. Prior to this change, however, abstract directives would only register themselves with the `MetadataRegistry` as being an abstract directive, without all of its other metadata like inputs and outputs. This meant that the template type checker was unable to resolve the inputs and outputs of these abstract directives, therefore failing to check them correctly. The typical error would be that some property does not exist on a DOM element, whereas said property should have been bound to the abstract directive's input. This commit fixes the problem by always registering the metadata of a directive or component with the `MetadataRegistry`. Tests have been added to ensure abstract directives are handled correctly in the template type checker, together with tests to verify the form of abstract directives in declaration files. Fixes #30080 PR Close #33131
indexer
The indexer
module generates semantic analysis about components used in an
Angular project. The module is consumed by a semantic analysis API on an Angular
program, which can be invoked separately from the regular Angular compilation
pipeline.
The module is not a fully-featured source code indexer. Rather, it is designed to produce semantic information about an Angular project that can then be used by language analysis tools to generate, for example, cross-references in Angular templates.
The indexer
module is developed primarily with the
Kythe ecosystem in mind as an indexing
service.
Scope of Analysis
The scope of analysis performed by the module includes
- indexing template syntax identifiers in a component template
- generating information about directives used in a template
- generating metadata about component and template source files
The module does not support indexing TypeScript source code.