Tracking Issue for type safety PRs

[dcbaker]

Meson should be completely type safe.

The following modules are still not fully type safe:

• mesonmain.py
• modules/cmake.py
• modules/dlang.py
• modules/python.py
• modules/hotdoc.py
• modules/python3.py
• munstable_coredata.py
• rewriter.py
• ast/interpreter.py
• interpreter/dependencyfallbacks.py
• interpreter/interpreter.py
  • dependency (Use typed_kwargs with dependency() #13995) (Share dependency implementation between dependency and python.installation.dependency #14199)
• backend/vs20*backend.py (Type safety for the VisualStudio Backend(s) #14219)
• backend/ninjabackend.py
• backend/xcodebackend.py
• mesondata.py
• options.py (Make the new options module fully type safe #13620)
• coredata.py (Make coredata and environment fully type safe #13737)
• environment.py (Make the Environment module fully type safe #14247)
• build.py
  • remove duplicated checks between the interpreter and the build module (De-duplicate argument validation in the build module #14133)

Additional work:

• Use additional typing features for better type safty
  • Make programming languages a Literal (Use typing features for supported languages #14784)
• Turn on strict-null checking (requires every module to be fully type safe).

[bruchar1]

Not sure if they are still relevant, but I found the following typing related PRs:

• build.py: Use typed_*_args for build_targets #9950 typed args for build targets #10714
• coredata.py: Refactor and fix typing in coredata #11492
• dependency: use typed_kwargs for Dependency #12057