angular-cn/packages/compiler-cli/test/ngtsc/fake_core
JoostK 3e3a1ef30d fix(ivy): support dynamic query tokens in AOT mode (#35307)
For view and content queries, the Ivy compiler attempts to statically
evaluate the predicate token so that string predicates containing
comma-separated reference names can be split into an array of strings
during compilation. When the predicate is a dynamic value that cannot be
statically interpreted at compile time, the compiler would previously
produce an error. This behavior breaks a use-case where an `InjectionToken`
is being used as query predicate, as the usage of the `new` keyword
prevents such predicates from being statically evaluated.

This commit changes the behavior to no longer produce an error for
dynamic values. Instead, the expression is emitted as is into the
generated code, postponing the evaluation to happen at runtime.

Fixes #34267
Resolves FW-1828

PR Close #35307
2020-02-27 16:05:21 -08:00
..
BUILD.bazel build: convert entry_point to label (#30627) 2019-06-11 00:03:11 +00:00
README.md feat(ivy): first steps towards ngtsc mode (#23455) 2018-04-25 13:25:33 -07:00
index.ts fix(ivy): support dynamic query tokens in AOT mode (#35307) 2020-02-27 16:05:21 -08:00
package.json feat(ivy): first steps towards ngtsc mode (#23455) 2018-04-25 13:25:33 -07:00

README.md

fake_core is a library designed to expose some of the same symbols as @angular/core, without requiring compilation of the whole of @angular/core. This enables unit tests for the compiler to be written without incurring long rebuilds for every change.

  • @angular/core is compiled with @angular/compiler-cli, and therefore has an implicit dependency on it. Therefore core must be rebuilt if the compiler changes.
  • Tests for the compiler which intend to build code that depends on @angular/core must have a data dependency on @angular/core. Therefore core must be built to run the compiler tests, and thus rebuilt if the compiler changes.

This rebuild cycle is expensive and slow. fake_core avoids this by exposing a subset of the @angular/core API, which enables applications to be built by the ngtsc compiler without needing a full version of core present at compile time.