A single name conflict between two libraries forces prefixes for all references to one of the libraries.

[jacob314]

A single name conflict between two libraries forces prefixes for all references to one of the libraries.

For example, user defined library contains a class named Point and dart:html contains a class named Point. Currently this has caused some users to abandon using dart:html altogether to avoid having to reference all types in dart:html with a prefixed name.
It would be better if only the conflicting names had to be prefixed rather than requiring all names to be prefixed.

[gbracha]

We'll take a look and try and come up with something that works for people.

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Added Accepted label.

[anders-sandholm]

Removed this from the Release1.0 milestone.
Added this to the M1 milestone.

[gbracha]

The show: and hide: combinators should solve this.

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Added Done label.

[gbracha]

Section 12.2 describes the show: and hide: combinators used to manipulate namespaces.

Implementation of these is tracke dby:

issue #3453 (VM)
issue #3454 (dart2js)
issue #3452 (analyzer)

[DartBot]

This comment was originally written by [email protected]

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Show and hide seems quite cumbersome. Why not add the notation used in cascading as syntactic sugar so
#import('somelib.dart', show: ['foo', 'bar'])
can be written as
#import('somelib.dart..foo..bar')
which is shorter and a lot easier to remember

[gbracha]

The syntax is changing. In any event, your proposal handles show but not hide. Nor will it scale to handle new combinators (say, rename) in the future.

[goc20]

error: The name 'User' is defined in the libraries 'package:firebase_auth/firebase_auth.dart' and 'package:tunein/models/user.dart'. (ambiguous_import at [tunein] lib/resources/firebase_methods.dart:48)

I've defined user in user.dart but but it is defined in firebase_auth.dart please help I want to use it from 'user.dart'.

[goc20]

We'll take a look and try and come up with something that works for people.

Added Accepted label.

error: The name 'User' is defined in the libraries 'package:firebase_auth/firebase_auth.dart' and 'package:tunein/models/user.dart'. (ambiguous_import at [tunein] lib/resources/firebase_methods.dart:48)

I've defined user in user.dart but but it is defined in firebase_auth.dart please help I want to use it from 'user.dart'.

[eernstg]

@goc20, check out section Using libraries, and in particular the subsection 'Importing only part of a library'.

import 'package:firebase_auth/firebase_auth.dart' hide User;
import 'package:firebase_auth/firebase_auth.dart' as firebase show User;
import 'package:tunein/models/user.dart';

void main() {
  firebase.User user1 = ...; // Declaration in firebase_auth.dart.
  User user2 = ...; // Declaration in user.dart.
}