[SR-4801] Name resolution problem for packages with same-named data types

[swift-ci]

Previous ID	SR-4801
Radar	rdar://problem/19774567
Original Reporter	mb2016 (JIRA User)
Type	Bug
Status	Resolved
Resolution	Duplicate

Attachment: Download

Environment

Problem originally spotted:
Xcode Version 8.2.1 (8C1002)

Attached test case:
Apple Swift version 3.0.2 (swiftlang-800.0.63 clang-800.0.42.1) on macOS 10.12.4

Additional Detail from JIRA

Votes	0
Component/s	Compiler
Labels	Bug
Assignee	None
Priority	Medium

md5: a802a68cf6c5643d16a8a3ed1138dc4d

duplicates:

• SR-898 Unresolvable "ambiguous for type lookup" error when using multiple modules

is duplicated by:

• SR-5304 Same name for class and namespace

Issue Description:

Normally in Swift you can resolve naming collisions using the syntax ModuleName.ObjectName. For example, if you have two packages, Foo and Bar, both with a class Snafu, you can specify Foo.Snafu and Bar.Snafu.

However, if the package shares a name with one of the data types declared in the package, this breaks down. So, for example, in the attached test case, there is a package Sample with a struct named Sample. If you import that package into other code and then attempt to access the struct as follows

var s = Sample.Sample()

you get a compiler error: type 'Sample' has no member 'Sample'