[refactoring] Fix error when renaming nested type at constructor - init() has no declaration location

[cltnschlosser]

protocol P1 {}
struct Test {
  var test: P1 {
    struct SP1: P1 {}
    return SP1()
  }
}

Renaming SPR1 on line 5 was incorrectly trying to rename the initializer instead of the type.

Resolves SR-11077.

cc @nathawes

[nathawes]

Thanks for fixing this Colton!

[nathawes]

@swift-ci please test

[nathawes]

This looks great, Colton! I realized while reading through it that the -find-local-rename-ranges refactoring will probably need a similar fix. Would you mind testing/fixing that one too? Xcode uses that request for the code roll UI it goes into when you invoke rename.

If you're interested in trying out your changes in Xcode, you can launch Xcode from the command line with an extra environment variable set that points to your local build:

$ __XPC_SOURCEKIT_TOOLCHAIN_LIB_PATH=/path/to/swift-build-dir/lib /Applications/Xcode-beta.app/Contents/MacOS/Xcode

[nathawes]

@swift-ci please test

[swift-ci]

Build failed
Swift Test Linux Platform
Git Sha - 26b9ffe66c13152d952d44433a77e8d9e13bf116

[swift-ci]

Build failed
Swift Test OS X Platform
Git Sha - 26b9ffe66c13152d952d44433a77e8d9e13bf116

[nathawes]

Thanks Colton – this looks great!