fix: enum variables accessed via self.

[charles-cooper]

What I did

UX fix: enum members accessed directly with self would throw a compiler panic

How I did it

fix namespace detection in codegen

How to verify it

see tests

Commit message

enum members accessed directly with self would throw a compiler panic

Description for the changelog

Cute Animal Picture

[codecov-commenter]

Codecov Report

Merging #2998 (ecbf3f2) into master (f31f0ec) will decrease coverage by 0.00%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master    #2998      +/-   ##
==========================================
- Coverage   88.29%   88.29%   -0.01%     
==========================================
  Files          97       97              
  Lines       10919    10933      +14     
  Branches     2583     2585       +2     
==========================================
+ Hits         9641     9653      +12     
- Misses        830      831       +1     
- Partials      448      449       +1     

Impacted Files	Coverage Δ
vyper/codegen/expr.py	84.32% <100.00%> (-0.04%)	⬇️
vyper/builtin_functions/functions.py	90.28% <0.00%> (-0.12%)	⬇️
vyper/cli/vyper_compile.py	68.14% <0.00%> (ø)
vyper/compiler/__init__.py	88.09% <0.00%> (ø)
vyper/compiler/output.py	89.00% <0.00%> (+0.11%)	⬆️
vyper/compiler/phases.py	90.99% <0.00%> (+0.60%)	⬆️

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[fubuloubu]

Maybe a few more tests, but otherwise looking good

[charles-cooper]

what kind of tests?

[fubuloubu]

what kind of tests?

Maybe public, accessing inside an internal method, that sort of thing

[charles-cooper]

@fubuloubu see 82e1d36