implement dart:mirrors

[vsmenon]

From @vsmenon on May 27, 2015 18:28

Implement the dart:mirrors API. We should be able to map this to our dynamic invocation code / metadata.

Copied from original issue: dart-archive/dev_compiler#199

[vsmenon]

The basic parts of this (i.e., the parts used by angular) are landed. This is still missing a lot of features - general method / function mirrors, parameter names, etc.

[vsmenon]

Angular is now using parameter annotations as well (only for constructors).

[vsmenon]

From @jmesserly on July 13, 2015 17:13

Angular is now using parameter annotations as well (only for constructors).

should be easy to implement now, given that we track parameter types?

[vsmenon]

Yeah, we've already got code for class-level annotations too, mainly we just need to decide how we want to encode it.

[vsmenon]

Angular is now using ClassMirror.owner:

https://api.dartlang.org/1.13.0/dart-mirrors/DeclarationMirror/owner.html

This will require us to embed a pointer in classes back to the containing library in generated code.

[vsmenon]

Some more items required for Angular apps in mirrors mode:

• Implement DeclarationMirror.owner
• Implement LibraryMirror.uri
• Instance var / getter / setter / method mirrors
• Fix ClassMirror.newInstance support factory constructors

All of these will require additional compile-time metadata.

[vsmenon]

From @eernstg on April 20, 2016 8:58

I guess the intended workflow is such that 'reflectable' would not be helpful here, as long as it is running as a pub transformer?

[vsmenon]

Yes, this is just a convenience to run Angular2 apps without transformation.

[vsmenon]

From @srawlins on August 1, 2016 17:47

LibraryMirror.uri is important for some rare cases of unit testing: dart-lang/test#110 requires this to find assets for a test.

[vsmenon]

Bumping and taking. We need some of this for testing support.

[matanlurey]

@vsmenon I imagine you can close this?

[jmesserly]

yup! closing this now that we have deprecation plan: #32294