"A class must be declared after its base class" on classes in different directories

[saschanaz]

TypeScript Version: master branch

Repro

1. Create a new JavaScript->Windows->Universal->Blank App project

2. Add directories and empty files as following:

   (App name)
   |>sources
   |    |>cats
   |    |    |>elephants
   |    |    | foo.ts
   |    | bar.ts
   
   sources/cats/elephants/foo.ts
   sources/cats/bar.ts
   

3. Write codes as following:

   // In sources/cats/elephants/foo.ts:
   class Foo extends Bar {
   }
   
   // In sources/cats/bar.ts:
   class Bar {
   }

4. Open project properties and set "Combine JavaScript output into file" to "js/app.js"

5. Unload project

6. Reload project

Expected behavior:

Compiler should automatically make a proper order for the classes

Actual behavior:

class Foo extends Bar {
//                ~~~
//                A class must be declared after its base class.
}

Workaround:

Rename "foo.ts" to "a.ts".

[RyanCavanaugh]

The compiler doesn't figure out what the "right" order of files is based on class dependencies or anything else. The usual methods are available: have a _reference.ts, use /// <reference directives, or use a module loader (if applicable)

[saschanaz]

Thanks! I would be happier if the error message told me the tip.