Fixes that a query like `viewChild('locator', {read: ElementRef<HTMLElement>})` would throw because we didn't account for expressions with type parameters.
I've also included support for parenthesized expressions and `as` expressions since it's pretty easy to support them.
Fixes#54645.
PR Close#54647
This is based on an internal issue report.
An earlier change introduced a diagnostic to report cases where a symbol is in the `deferredImports` array, but is used eagerly. The check worked by looking through the deferred blocks in a scope, resolving the scope for each and checking if the element is within the scope. The problem is that resolving the scope won't work across scoped node boundaries. For example, if there's a control flow statement around the block or within the block but around the deferred dependency, it won't be able to resolve the scope since it isn't a direct child, e.g.
```
@if (true) {
@defer {
<deferred-dep/>
}
}
```
To fix this the case where the deferred block is inside a scoped node, I've changed the `R3BoundTarget.deferBlocks` to be a `Map` holding both the deferred block and its corresponding scope. Then to resolve the case where the dependency is within a scoped node inside the deferred block, I've added a depth-first traversal through the scopes within the deferred block.
PR Close#54499
We have a couple of cases now (#53753 and #54414) where we're forced to redefine enums as object literals. These literals aren't rendered in the best way in the docs so these changes introduce a new `object-literal-as-enum` tag that we can use to mark them so they're treated for documentation purposes.
PR Close#54487
This commit addresses a problem with PR #53695 that introduced support for default imports,
where the actual dynamic import used in the defer loading function continued to use the
symbol name, instead of `.default` for the dynamic import. This issue went unnoticed in the
testcase because a proper instance was being generated for the `ɵsetClassMetadataAsync` function,
but not the generated dependency loader function.
Fixes#54491
PR Close#54495
In order to allow both signals and non-signals in two-way bindings, we have to pass the expression through `ɵunwrapWritableSignal`. The problem is that the language service uses a bundled compiler that is fairly new, but it may be compiling an older version of Angular that doesn't expose `ɵunwrapWritableSignal` (see https://github.com/angular/vscode-ng-language-service/issues/2001).
These changes add a `_angularCoreVersion` flag to the compiler which the language service can use to pass the parsed Angular version to the compiler which can then decide whether to emit the function.
PR Close#54423
An identical addition to: 760b1f3d0b.
This commit expands the `try/catch`-es:
- to properly NOT throw and just convert the diagnostic.
- to be in place for all top-level instances. Notably, this logic cannot
reside in the template type checker directly as otherwise we would
risk multiple duplicate diagnostics.
PR Close#54309
Fixes that `ɵunwrapWritableSignal` inferring getter functions as not matching the interface of `WritableSignal` instead of preserving them.
PR Close#54252
In a previous commit the TCB was changed to cast the assignment to an input in order to widen its type to allow `WritableSignal`. This ended up breaking existing inputs whose setter has a wider type than its getter. These changes switch to unwrapping the value on the binding side.
PR Close#54252
Reworks the TCB for two-way bindings to make them simpler and to avoid regressions for two-way bindings to generic inputs. The new TCB looks as follows:
```
var _t1: Dir;
var _t2 = _t1.input;
(_t1 as typeof _t2 | WritableSignal<typeof _t2>) = expression;
```
PR Close#54252
Currently the error is a generic error "exportAs must be a string ...". This commit makes the error more specific to local compilation and adds some action items.
PR Close#54230
Currently the error is a generic error "selector must be a string ...". This commit makes the error more specific to local compilation and adds some action items.
PR Close#54230
Currently the error is a generic error "selector must be a string ...". This commit makes the error more specific to local compilation and adds some action items.
PR Close#54230
Currently the correct error message is shown only if @Component.styles is an array with some unresolved element. This change supports the new case of string type for the @Component.styles field.
PR Close#54230
The trailing error message comes from tracing the chain of DymaicValue which leads to a mostly useless error that highlights the same symbol as the original message and emits the error message "Unknown reference". This error message is removed in the favour of the original message which suffices.
PR Close#54230
A single error code is created to unify the common error pattern in local compilation mode where an imported const cannot be resolved, but needs to be resolved. This mainly happens for Angular decorator fields such as @Component.template.
The error messages are also upgraded to be more centered around this unifying theme.
PR Close#54230
Currently, when two components are named `TestComponent`, and both would
use e.g. control flow. Templates would be generated by the compiler and
those would conflict at runtime because the names for the template
functions are not ensured to be unique.
This seems like a more general problem that could be tackled in the
future in the template pipeline by always using the `ConstantPool`, but
for now, we should be good already, given us ensuring the `baseName`'s are
always unique.
PR Close#54273
The `read` option for queries can rely on lexical variables inside the
class. These constructs are fine from a technical perspective in
TypeScript, but in practice, when the component/directive definition is
being created, the read value is extracted into the definition,
**outside** of the class. This breaks `this` references.
To fix this, we are restricting the `read` option to literal values.
Similar to `descendants`. Literal references are in practice constructs
like:
- `read: bla.X`
- `read: X`
where `bla` or `X` is never a `ThisKeywoord`- hence fixing the issue
and also simplifying the patterns for easier single file compilation.
PR Close#54257
Adds an ngtsc diagnostic and compilation output test for `output()`. The
test will verify certain recognition restrictions and ensures that
diagnostics are raised, in addition to proper full compilation output
being generated (aside from the compliance tests verifying output more
closely).
PR Close#54217
The deps tracker which is responsible to track orphan components does not work for classes mutated by custom decorator. Some work needed to make this happen (tracked in b/320536434). As a result, with option `forbidOrphanComponents` being true the deps tracker will falsely report any component as orphan if it or its NgModule have custom/duplicate decorators. So it is unsafe to use this option in the presence of custom/duplicate decorator and we disable it until it is made compatible. Note that applying custom/duplicate decorators to `@Injectable` classes is ok since these classes never make it into the deps tracker. So we excempt them.
PR Close#54139
Custom/duplicate decorators break the deps tracker in local mode. But deps tracker only deals with non-injectable classes. So applying custom/duplicate decorators to `@Injectable` only classes does not disturb deps tracker and local compilation in general. There are also ~ 100 such cases in g3 which cannot be cleaned up.
PR Close#54139
For cases like this:
```
@Component({...})
@Component({...})
export class SomeComp {
}
```
The `DecoratorHandler.detect` apparantly matches only one of the `@Component` decorator, leaving the other undetected which will be transformed by TS decorator helper and that breaks local compilation runtimes. But the error message only mentioned "custom" decorator, while in this case it is a "duplicate Angular" decorator. The respective error message is updated thus.
PR Close#54139
Fixes that `@defer` blocks weren't recognizing default imports and generating the proper code for them. Default symbols need to be accessed through the `default` property in the `import` statement, rather than by their name.
PR Close#53695
In one of the earlier commits, the logic that appends `=$event` before parsing two-way bindings was removed and some validation was added to prevent unassignable expressions from being used. This ended up being problematic, because previously the parser was incorrectly allowing some invalid expressions which users came to depend on. For example, it transformed `[(value)]="a && a.b"` to `a && (a.b = $event)`.
These changes add some special cases for the common breakages that came up during the TGP.
PR Close#54154
Updates the template definition builder to emit the new format for the listener side of two-way bindings.
```js
// Before
listener("ngModelChange", function($event) {
return ctx.name = $event;
});
// After
ɵɵtwoWayListener("ngModelChange", function($event) {
ɵɵtwoWayBindingSet(ctx.name, $event) || (ctx.name = $event);
return $event;
});
```
PR Close#54154
At the moment the extra import generation in local compilation mode fails if these extra imports produce a cycle. To handle this, the cycle handling strategy is updated for local compilation, and following the behaviour in the full compilation mode, the compiler does not generate extra import if it leads to cycle and instead leave things to the runtime.
PR Close#53543
With option `generateExtraImportsInLocalMode` set, in local mode the compiler generates extra imports for each component local dependencies. Here local dependencies means all component's dependencies within the same compilation unit.
To achieve this, the compiler performs a "local version" of its regular static analysis to find each component's deps, and these deps are used to generate extra side effect imports.
PR Close#53543
With option `generateExtraImportsInLocalMode` set in local compilation mode, the compiler generates extra side effect imports using this rule: any external module from which an identifier is imported into an NgModule will be added as side effect import to every file in the compilation unit. To illustrate this better assume the compilation unit has source files `a.ts` and `b.ts`, and:
```
// a.ts
import {SomeExternalStuff} from 'path/to/some_where';
import {SomeExternalStuff2} from 'path/to/some_where2';
...
@NgModule({imports: [SomeExternalStuff]})
```
then the extra import `import "path/to/some_where"` will be added to both `a.js` and `b.js`. Note that this is not the case for `import "path/to/some_where2"` though, since the symbol `SomeExternalStuff2` is not imported into any NgModule.
The math behind this mechanism is, in local compilation mode we cannot resolve component external dependencies fully. For example if a component in `a.ts` uses an external component defined in an external file `some_external_comp.ts` then we can generate the import to this file in `a.js`. Instead, we want to generate an import to a file that "gurantees" that `a.js` is placed after `some_external_comp.js` in the bundle. Now since the component in `some_external_comp.ts` is used in `a.ts`, then there must be a chain of imports starting from the NgModule that declares the component in `a.ts` to the component in `some_external_comp.ts`. This chain means some file in the same compilation unit as `a.ts` should import some external NgModule which includes `some_external_comp.ts` in its transitive closure and import it to some NgModule. So by adding this import to `a.js` we ensure that the bundling will have the right order.
PR Close#53543
At the moment local compilation mode does not support custom decorators, and it leads to unhandled errors. In this change a compile time diagnostic is produced in local mode for custom decorators. This is a temporary solution since there are few custom decorators are in use in g3. Custom decorators will be eventually supported in local mode.
PR Close#53983
This commit introduces three additional diagnostics for queries:
- If a query (either using decorator or signal-based) is declared on a
static class member, a diagnostic is raised.
- If a signal-based query is mixed with a query decorator, a diagnostic
is raised. Similar to signal inputs.
- If a singal-based query is also declared in the directive/component
class decorator metadata, a diagnostic is raised.
PR Close#54019
Adds a compiler integration test for recognizing signal-based queries,
and emitting the expected output. Concrete output will be verified via
the compliance tests.
PR Close#53978
At the moment local compilation breaks for host directives because the current logic relies on global static analysis. This change creates a local version by cutting the diagnostics and copying the directive identifier as it is to the generated code without attempting to statically resolve it.
PR Close#53877
At the moment when unified host is selected (through option `_useHostForImportGeneration`) the compiler always generates alias reexports. Such reexports are mainly generated to satisfy strict dependency condition for generated files. Such condition is no longer the case for G3. At the same time, these alias reexports make it impossible to mix locally compiled targets with globally compiled targets. More precisely, a globally compiled target may not be able to consume a locally compiled target as its dependency since the former may import from the alias reexports which do not exist in the latter due to local compilation mode. So, to make global-local compilation interop possible, it is required to be able to turn off alias reexport generation.
PR Close#53937
This commit adds extra logic to produce a diagnostic in case `@Component.deferredImports` contain types from imports that also bring eager symbols. This would result in retaining a regular import and generating a dynamic import, which would not allow to defer-load dependencies.
PR Close#53899
Currently when the extended type check fails due to an import reference
that cannot be generated, the fatal diagnostic is not caught and
not properly exposed as a `ts.Diagnostic` that can be gracefully
handled. This is inconsistent to non-extended type checking diagnostics.
This is problematic because Angular CLI applications currently fail in
obscure ways because:
- the CLI does not expect `getDiagnosticsForFile` to actually throw
runtime errors.
- the CLI does not seem to properly print these errors given the
parallel workers and build excection, and those errors are
especially hard to debug because there is no `stack` for
`FatalDiagnosticError`'s.
Example: `MyDir` is not exported and the type check block cannot reference it.
PR Close#53896
This allows us to ensure signal inputs and a potential JIT transform
remain single file compilation compatible. The consequences are that
options need to be statically analyzable more strictly, compared to
loosened restrictions with static interpretation where e.g. `alias`
can be defined through a shared variable.
PR Close#53872
Currently when someone declares a signal or non-signal input on a static
class member, the compiler will not yield any diagnostic. We can detect
these mistakes and report a diagnostic to help our users.
PR Close#53808
This commit addds two diagnostics for two scenarios where signal inputs
are declared incorrectly:
- a signal input is also annotated with `@Input` in the TypeScript
sources.
- a signal input is also declared in the `inputs` option of
`@Directive/`@Component`.
PR Close#53808
This commit changes the `HasTransform` flag to be only concerned with
decorator inputs. This allows us to automatically detect signal input
transforms without reliance on the flag, resulting in less complexity in
the compiler (as outlined in the design doc) and various other places,
while it also allows us to simplify JIT support for signal inputs
because there would be no need to capture the "hasTransform" state in
the decorator so that JIT can generate the according input flags.
`isSignal` will still persist as an input flag to allow for monomorphic
and highly efficient distinguishing at runtime, whether an input is
signal based or not. JIT transform will also need to propagate this
information to the runtime somehow.
PR Close#53808
Instead of computing the bit input flags at compile-time and inling
the final bit flag number, we will use the `InputFlags` enum directly.
This is a little more code in the compiler side, but will allow us to
have better debuggable development code, and also prevents problems
where runtime flag bitmasks differ from the compiler flag bitmasks.
This is in practice a noop for optimized applications as the enum values
would be inlined anyway. This matches existing compiler emit for e.g.
change detection strategy, or view encapsulation enums.
PR Close#53571
Kristiyan Kostadinov