有没有人让Dart dev_compiler工作？

Question

我想尝试使用生成ES6的Dart dev编译器.我安装了它

pub global activate -sgit git@github.com:dart-lang/dev_compiler.git

然后我创建了一个简单的Dart类:

library wat;

class Person {
    String first_name;
    String last_name;
    int amountOfAwesomeness;

    Person(this.first_name, this.last_name, [this.amountOfAwesomeness = 0]);
    String get name => "$first_name $last_name is awesome:$amountOfAwesomeness";
}

然后我试着编译它:

dartdev -o ./ person.dart

但我得到一个例外:

Unhandled exception:
'package:dev_compiler/src/dependency_graph.dart': Failed assertion: line 60 pos 16: 'false' is not true.
#0      _AssertionError._throwNew (dart:core-patch/errors_patch.dart:27)
#1      SourceGraph.nodeFromUri.<anonymous closure> (package:dev_compiler/src/dependency_graph.dart:60:16)
#2      _CompactLinkedHashMap.putIfAbsent (dart:collection-patch/compact_hash.dart:193) 
#3      SourceGraph.nodeFromUri (package:dev_compiler/src/dependency_graph.dart:50:29)
#4      Compiler.Compiler (package:dev_compiler/devc.dart:76:38)
#5      main (http://localhost:60878/devc.dart:42:22)
#6      _startIsolate.<anonymous closure> (dart:isolate-patch/isolate_patch.dart:253)
#7      _RawReceivePortImpl._handleMessage (dart:isolate-patch/isolate_patch.dart:142)

看起来像这样一个简单的例子应该有效.我究竟做错了什么？dev_compiler还没准备好试用吗？

Answer 1

更新:

dart开发编译器正在Dart版本1.24中的pub中构建.请参见https://github.com/dart-lang/sdk/blob/master/CHANGELOG.md#tool-changes-1

如果你想使用它,只需使用Dart 1.24并添加到pubspec.yaml以下

  web:
    compiler:
      debug: dartdevc # Use DDC for pub serve
      release: dartdevc # Use DDC for pub build

原版的:

自从我开始工作以来回答我自己的问题.上面的主要问题是输出目录.如果您没有指定输出目录,它似乎什么都不做.因此,您必须为输出目录指定名称.当前目录显然不起作用.绝对路径似乎确实有效.

有效的例子: dartdevc -o mydir input.dart dartdevc -o /path/to/dir input.dart

不起作用的示例: dartdevc -o ./ input.dart

上例的输出是:

var person;
(function(exports) {
  'use strict';
  class Person extends dart.Object {
    Person(first_name, last_name, amountOfAwesomeness) {
      if (amountOfAwesomeness === void 0)
        amountOfAwesomeness = 0;
      this.first_name = first_name;
      this.last_name = last_name;
      this.amountOfAwesomeness = amountOfAwesomeness;
    }
    get name() {
      return `${this.first_name} ${this.last_name} is awesome: ${this.amountOfAwesomeness}`;
    }
  }
  // Exports:
  exports.Person = Person;
})(person || (person = {}));
//# sourceMappingURL=person.js.map