Generic typealiases

Chris_Lattner · March 8, 2016, 7:09am

Hi All,

I just landed an implementation of generic typealiases, e.g. things like:

    typealias StringDictionary<T> = Dictionary<String, T>
    typealias IntFunction<T> = (T) -> Int
    typealias MatchingTriple<T> = (T, T, T)
    typealias BackwardTriple<T1,T2,T3> = (T3, T2, T1)

etc now work.

I have tested various scenarios with them, but I wouldn’t be surprised if there are corner cases that aren’t working yet. Please try kicking them around and let me know if you run into any problems, thanks!

-Chris

jtbandes · March 8, 2016, 7:45am

Awesome!

···

On Mon, Mar 7, 2016 at 11:09 PM, Chris Lattner via swift-dev < swift-dev@swift.org> wrote:

Hi All,

I just landed an implementation of generic typealiases, e.g. things like:

    typealias StringDictionary<T> = Dictionary<String, T>
    typealias IntFunction<T> = (T) -> Int
    typealias MatchingTriple<T> = (T, T, T)
    typealias BackwardTriple<T1,T2,T3> = (T3, T2, T1)

etc now work.

I have tested various scenarios with them, but I wouldn’t be surprised if
there are corner cases that aren’t working yet. Please try kicking them
around and let me know if you run into any problems, thanks!

-Chris

_______________________________________________
swift-dev mailing list
swift-dev@swift.org
https://lists.swift.org/mailman/listinfo/swift-dev

blangmuir · March 8, 2016, 3:18pm

I tried doing a SourceKit cursor-info on a generic typealias of a tuple type, but it crashed when trying to mangle any of the typealias's generic parameters. Should we be able to mangle the generic parameter, or do we need an early exit?

Assertion failed: (isa<NominalTypeDecl>(ctx) && "Only nominal types are contexts for mangleable entities"), function mangleContext, file /Users/blangmuir/src/s/swift/lib/AST/Mangle.cpp, line 254.
<snip>
5 libsourcekitdInProc.dylib 0x0000000105a43591 __assert_rtn + 81
6 libsourcekitdInProc.dylib 0x000000010616b6a7 swift::Mangle::Mangler::mangleContext(swift::DeclContext const*, swift::Mangle::Mangler::BindGenerics) + 1735
7 libsourcekitdInProc.dylib 0x000000010616c0ba swift::Mangle::Mangler::mangleEntity(swift::ValueDecl const*, unsigned int) + 474
8 libsourcekitdInProc.dylib 0x00000001061af981 swift::ide::printDeclUSR(swift::ValueDecl const*, llvm::raw_ostream&) + 1041

Ben

···

On Mar 7, 2016, at 11:09 PM, Chris Lattner via swift-dev <swift-dev@swift.org> wrote:

Hi All,

I just landed an implementation of generic typealiases, e.g. things like:

   typealias StringDictionary<T> = Dictionary<String, T>
   typealias IntFunction<T> = (T) -> Int
   typealias MatchingTriple<T> = (T, T, T)
   typealias BackwardTriple<T1,T2,T3> = (T3, T2, T1)

etc now work.

I have tested various scenarios with them, but I wouldn’t be surprised if there are corner cases that aren’t working yet. Please try kicking them around and let me know if you run into any problems, thanks!

-Chris

_______________________________________________
swift-dev mailing list
swift-dev@swift.org
https://lists.swift.org/mailman/listinfo/swift-dev

dabrahams · March 9, 2016, 12:30am

W00t; I didn't know this was coming!

···

on Mon Mar 07 2016, Chris Lattner <swift-dev-AT-swift.org> wrote:

Hi All,

I just landed an implementation of generic typealiases, e.g. things like:

    typealias StringDictionary<T> = Dictionary<String, T>
    typealias IntFunction<T> = (T) -> Int
    typealias MatchingTriple<T> = (T, T, T)
    typealias BackwardTriple<T1,T2,T3> = (T3, T2, T1)

etc now work.

I have tested various scenarios with them, but I wouldn’t be surprised
if there are corner cases that aren’t working yet. Please try kicking
them around and let me know if you run into any problems, thanks!

--
-Dave

Chris_Lattner · March 9, 2016, 5:27am

Thanks for catching this, and for the great testcase. I implemented mangling/usr generation in ae919bd.

-Chris

···

On Mar 8, 2016, at 7:18 AM, Ben Langmuir <blangmuir@apple.com> wrote:

I tried doing a SourceKit cursor-info on a generic typealias of a tuple type, but it crashed when trying to mangle any of the typealias's generic parameters. Should we be able to mangle the generic parameter, or do we need an early exit?

Assertion failed: (isa<NominalTypeDecl>(ctx) && "Only nominal types are contexts for mangleable entities"), function mangleContext, file /Users/blangmuir/src/s/swift/lib/AST/Mangle.cpp, line 254.
<snip>
5 libsourcekitdInProc.dylib 0x0000000105a43591 __assert_rtn + 81
6 libsourcekitdInProc.dylib 0x000000010616b6a7 swift::Mangle::Mangler::mangleContext(swift::DeclContext const*, swift::Mangle::Mangler::BindGenerics) + 1735
7 libsourcekitdInProc.dylib 0x000000010616c0ba swift::Mangle::Mangler::mangleEntity(swift::ValueDecl const*, unsigned int) + 474
8 libsourcekitdInProc.dylib 0x00000001061af981 swift::ide::printDeclUSR(swift::ValueDecl const*, llvm::raw_ostream&) + 1041

Ben

On Mar 7, 2016, at 11:09 PM, Chris Lattner via swift-dev <swift-dev@swift.org> wrote:

Hi All,

I just landed an implementation of generic typealiases, e.g. things like:

  typealias StringDictionary<T> = Dictionary<String, T>
  typealias IntFunction<T> = (T) -> Int
  typealias MatchingTriple<T> = (T, T, T)
  typealias BackwardTriple<T1,T2,T3> = (T3, T2, T1)

etc now work.

I have tested various scenarios with them, but I wouldn’t be surprised if there are corner cases that aren’t working yet. Please try kicking them around and let me know if you run into any problems, thanks!

-Chris

_______________________________________________
swift-dev mailing list
swift-dev@swift.org
https://lists.swift.org/mailman/listinfo/swift-dev