dart2_constant 1.0.2+dart2

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This package is a polyfill for the core library constant names that are changing from Dart 1 to Dart 2.

In Dart 1, all core library constants were in SCREAMING_CAPS. In Dart 2, they're being changed to camelCase. This package makes it possible for packages to support both Dart 1 and Dart 2 by providing camelCase constants that work on all versions of Dart.

This package has a library for each library dart: library that contained constants in Dart 1. These libraries contain only constants, using the Dart 2 names. They should be imported using a prefix so as to avoid colliding with core library names:

import 'package:dart2_constant/convert.dart' as convert;

String decodeUtf8(List<int> bytes) => convert.utf8.decode(bytes);

Note that this even supports constants that haven't yet migrated in the core libraries, such as those in dart:io and dart:html. These are provided for compatibility with future SDK changes.

How It Works #

Each version of dart2_constant has two releases, one tagged +dart1 that's only compatible SDKs that have old-style constants and one tagged +dart2 that's only compatible with SDKs that have new-style constants. As long as you depend on dart2_constant, pub's version solver will make sure your users get a version of it that works for them.

See Also #

The dart2_fix package can be used to automatically migrate constant references from Dart 1 style to Dart 2 style. It doesn't currently support migrating to dart2_constant references, though.

1.0.2 #

  • Widen SDK constraint to include 2.0.0.

1.0.1 #

  • Fix the homepage URL.

1.0.0 #

  • Initial version.

Use this package as a library

1. Depend on it

Add this to your package's pubspec.yaml file:

  dart2_constant: ^1.0.2+dart2

2. Install it

You can install packages from the command line:

with pub:

$ pub get

Alternatively, your editor might support pub get. Check the docs for your editor to learn more.

3. Import it

Now in your Dart code, you can use:

import 'package:dart2_constant/async.dart';
import 'package:dart2_constant/convert.dart';
import 'package:dart2_constant/core.dart';
import 'package:dart2_constant/developer.dart';
import 'package:dart2_constant/html.dart';
import 'package:dart2_constant/io.dart';
import 'package:dart2_constant/isolate.dart';
import 'package:dart2_constant/math.dart';
import 'package:dart2_constant/svg.dart';
import 'package:dart2_constant/typed_data.dart';
import 'package:dart2_constant/web_gl.dart';
import 'package:dart2_constant/web_sql.dart';
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Package Constraint Resolved Available
Direct dependencies
Dart SDK >=2.0.0-dev.34.0 <3.0.0