[GitHub] [royale-compiler] Hydroper commented on issue #100: Literal string to identify package public namespace

[GitBox <gi...@apache.org>]

Hydroper commented on issue #100: Literal string to identify package public namespace
URL: https://github.com/apache/royale-compiler/issues/100#issuecomment-560565835
 
 
   The purpose would be to improve readability in large programs. In C# or Rust you have these directives:
   
   ```rust
   use foo::lib::utils as qux;
   ```
   
   ```C#
   import Qux = Foo.Lib.Utils;
   ```
   
   In ActionScript, because there is not something like `import qux = foo.library.utils.*`, programs where scope has lexical conflicting names (like `package1.Item` and `package2.Item`) the programmer must use the fully package-qualified names.
   
   For certain compiler writting methods, it is good, for instance, to know what belongs to semantic data model and what belongs to bytecode structure. (In my mind, I reflect names such as `sem::Activation`, `bc_ns::MetaData`).
   
   > The code that determines if two namespaces are equal requires that the "kind" of both namespaces is also equal. So, a namespace defined in ActionScript code (`ABCConstants.CONSTANT_Namespace`) can never be equal to a package namespace (`ABCConstants.CONSTANT_PackageNs`).
   
   For most cases, when namespaces are represented as heap objects, pooling explicit namespaces (except these of anonymous identity such as `namespace ns`) and comparing by reference should work.

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