dart-mirrors

I'm perfectly willing to play with this until I get it right, but was hoping someone might give me a hint. The parameter is declared in the docs (gen-dartdocs/dart-mirrors/ClassMirror/newInstance.html) as InstanceMirror newInstance(Symbol constructorName, List positionalArguments, [Map<Symbol,dynamic> namedArguments]); There is a nice writeup on the format of positionalArguments and namedArguments in the docs. However, it is just a little on the abstract side of my current tolerance level. A decent discussion also exists at http://japhr.blogspot.com/2014/06/dart-factory-method-pattern.html But

I looked at the dart:mirrors library, and I found ClassMirror . While I saw getField I didn't see access to all fields. I did see getters , though. If I want to get all fields for a class, do I have to go through getters ? Zdeslav Vojkovic's answer is a bit old. This works for me, for Dart 1.1.3, as of March 2 2014. import 'dart:mirrors'; class Test { int a = 5; static int s = 5; final int _b = 6; int get b => _b; int get c => 0; } void main() { Test t = new Test(); InstanceMirror instance_mirror = reflect(t); var class_mirror = instance_mirror.type; for (var v in class_mirror.declarations

My build of my projects are failing because they rely on mirrors and dart build out put tells me to use --enable-experimental-mirrors to try to use mirrors in dart2js code as it is. so if I run pub build --enable-experimental-mirrors all I get is Could not find an option named "enable-experimental-mirrors" . Any hints much appreciated. I haven't tried this myself yet but maybe you can pass it as a command line option in the transformer config transformers: - $dart2js: commandLineOptions: [--enable-experimental-mirrors] 来源： https://stackoverflow.com/questions/27720721/how-to-enable-enable

Is there a REPL for Dart to experiment with? I tried inputing dart code in devtools in Dartium and that also didn't work. So I couldn't find an easy way to play with various APIs in dart. Though it is not really a REPL, you may find the Try Dart online tool useful for playing around. It's a bit slow, since it is actually compiling the Dart code to JavaScript in order to have it work within the browser. There is also a console that someone built, which is probably better if you're looking for a real REPL, but it requires a bit of setup. I tried inputing dart code in devtools in Dartium and that

Dartlang tutorial introduces package:meta https://www.dartlang.org/docs/dart-up-and-running/contents/ch02.html#ch02-metadata DartEditor recognise the metadata as shown at above tutorial. The tutorial also explains how to create custom metadata and retrieve it. But there is no code sample on how to retrieve it. Naoto Hc Through reading some implementations such as @published metadata in Polymer.dart, I find the way. https://www.dartlang.org/articles/reflection-with-mirrors/ https://api.dartlang.org/apidocs/channels/stable/dartdoc-viewer/dart-mirrors#id_reflect Here is the sample code. import

Dart specification states: Reified type information reflects the types of objects at runtime and may always be queried by dynamic typechecking constructs (the analogs of instanceOf, casts, typecase etc. in other languages). Sounds great, but there is no instanceof -like operator. So how do we perform runtime type-checking in Dart? Is it possible at all? Patrick The instanceof-operator is called is in Dart. The spec isn't exactly friendly to a casual reader, so the best description right now seems to be http://www.dartlang.org/articles/optional-types/ . Here's an example: class Foo { } main() {

I have a Dart class that is annotated with metadata: class Awesome { final String msg; const Awesome(this.msg); String toString() => msg; } @Awesome('it works!') class Cool { } I want to see if Cool was annotated, and if so, with what. How do I do that? Seth Ladd Use the dart:mirrors library to access metadata annotations. import 'dart:mirrors'; class Awesome { final String msg; const Awesome(this.msg); String toString() => msg; } @Awesome('it works!') class Cool { } void main() { ClassMirror classMirror = reflectClass(Cool); List<InstanceMirror> metadata = classMirror.metadata; var obj =