Previously we only removed assignments to `Class.decorators = [];`
if the array was not empty.
Now we also remove calls to `__decorate([])`, similarly.
PR Close#26236
Previously, classes that were declared via variable declarations,
rather than class declarations, were being excluded from the
parsed classes.
PR Close#26236
The most recent Angular distributions have begun to use __decorate instead of Class.decorators.
This prevents `ngcc` from recognizing the classes and then fails to perform the transform to
ivy format.
Example:
```
var ApplicationModule = /** @class */ (function () {
// Inject ApplicationRef to make it eager...
function ApplicationModule(appRef) {
}
ApplicationModule = __decorate([
NgModule({ providers: APPLICATION_MODULE_PROVIDERS }),
__metadata("design:paramtypes", [ApplicationRef])
], ApplicationModule);
return ApplicationModule;
}());
```
Now `ngcc` recognizes `__decorate([...])` declarations and performs its transform.
See FW-379
PR Close#26236
In some formats variables are declared as `var` or `let` and only
assigned a value later in the code.
The ngtsc resolver still needs to be able to resolve this value,
so the host now provides a `host.getVariableValue(declaration)`
method that can do this resolution based on the format.
The hosts make some assumptions about the layout of the
code, so they may only work in the constrained scenarios that
ngcc expects.
PR Close#26236
This is necessary to avoid webpack/webpack#8082, when installing
dependencies without taking the lockfile into account (e.g. with
`yarn aio-use-local` - locally or on CI).
PR Close#26202
While creating FESM files, rollup usually drops all unused symbols.
All *__POST_NGCC__ are unused unless ngcc rewires stuff. To prevent this DCE
we reexport them as private symbols. If ngcc is not used, these symbols will
be dropped when we optimize an application bundle.
PR Close#26071
This commit builds on the NgtscTestEnvironment helper work before and
introduces template_typecheck_spec.ts, which contains compiler tests
for template type-checking.
PR Close#26203
This commit gets ready for the introduction of ngtsc template
type-checking tests by refactoring test environment setup into a
custom helper. This helper will simplify the authoring of future
ngtsc tests.
Ngtsc tests previously returned a numeric error code (a la ngtsc's CLI
interface) if any TypeScript errors occurred. The helper has the
ability to run ngtsc and return the actual array of ts.Diagnostics, which
greatly increases the ability to write clean tests.
PR Close#26203
This commit enables generation and checking of a type checking ts.Program
whenever the fullTemplateTypeCheck flag is enabled in tsconfig.json. It
puts together all the pieces built previously and causes diagnostics to be
emitted whenever type errors are discovered in a template.
Todos:
* map errors back to template HTML
* expand set of type errors covered in generated type-check blocks
PR Close#26203
This commit adds an ngTemplateGuard_ngIf static method to the NgIf
directive and an ngTemplateContextGuard static method to NgFor. The
function of these two static methods is to enable type narrowing
within generated type checking code for consumers of the directives.
PR Close#26203
Before type checking can be turned on in ngtsc, appropriate metadata for
each component and directive must be determined. This commit adds tracking
of the extra metadata in *DefWithMeta types to the selector scope handling,
allowing for later extraction for type-checking purposes.
PR Close#26203
This commit introduces the template type-checking context API, which manages
inlining of type constructors and type-check blocks into ts.SourceFiles.
This API will be used by ngtsc to generate a type-checking ts.Program.
An TypeCheckProgramHost is provided which can wrap a normal ts.CompilerHost
and intercept getSourceFile() calls. This can be used to provide source
files with type check blocks to a ts.Program for type-checking.
PR Close#26203
This commit introduces the main functionality of the type-check compiler:
generation of type check blocks. Type check blocks are blocks of TypeScript
code which can be inlined into source files, and when processed by the
TypeChecker will give information about any typing errors in template
expressions.
PR Close#26203
Template type-checking will make use of expression and statement
translation as well as the ImportManager, so this code needs to
live in a separate build target which can be depended on by both
the main ngtsc transform as well as the template type-checking
mechanism. This refactor introduces a separate build target
for that code.
PR Close#26203
Previously in Ivy, metadata for directives/components/modules/etc was
carried in .d.ts files inside type information encoded on the
DirectiveDef, ComponentDef, NgModuleDef, etc types of Ivy definition
fields. This works well, but has the side effect of complicating Ivy's
runtime code as these extra generic type parameters had to be specified
as <any> throughout the codebase. *DefInternal types were introduced
previously to mitigate this issue, but that's the wrong way to solve
the problem.
This commit returns *Def types to their original form, with no metadata
attached. Instead, new *DefWithMeta types are introduced that alias the
plain definition types and add extra generic parameters. This way the
only code that needs to deal with the extra metadata parameters is the
compiler code that reads and writes them - the existence of this metadata
is transparent to the runtime, as it should be.
PR Close#26203
This commit introduces //packages/compiler-cli/src/ngtsc/typecheck as a
container for template type-checking code, and implements an initial API:
type constructor generation.
Type constructors are static methods on component/directive types with
no runtime implementation. The methods are used during compilation to
enable inference of a component or directive's generic type parameters
from the types of expressions bound to any of their @Inputs. A type
constructor looks like:
class Directive<T> {
someInput: T;
static ngTypeCtor<T>(init: Partial<Pick<Directive<T>, 'someInput'>>): Directive<T>;
}
It can be used to infer a type for T based on the input:
const _dir = Directive.ngTypeCtor({someInput: 'string'}); // Directive<T>
PR Close#26203
This commit introduces the "t2" API, which processes parsed template ASTs
and performs a number of functions such as binding (the process of
semantically interpreting cross-references within the template) and
directive matching. The API is modeled on TypeScript's TypeChecker API,
with oracle methods that give access to collected metadata.
This work is a prerequisite for the upcoming template type-checking
functionality, and will also become the basis for a refactored
TemplateDefinitionBuilder.
PR Close#26203
This commit adds a generic type parameter to the SelectorMatcher
class and its associated response types. This makes the API for
matching selectors and obtaining information about the matched
directives significantly more ergonomic and type-safe.
PR Close#26203
Upcoming implementation work for template type-checking will need to reuse the
code which matches directives inside a template, so this refactor commit moves
the code to a shared location in preparation.
This commit pulls the code needed to match directives against a template node
out of the TemplateDefinitionBuilder into a utility function, in preparation
for template type-checking and other TemplateDefinitionBuilder refactoring.
PR Close#26203
