compilers: Tell mypy that the compiler mixins are just that

We do this by making the mixins inherit the Compiler class only when
mypy is examining the code (using some clever inheritance shenanigans).
This caught a bunch of issues, and also lets us delete a ton of code.

1 files changed, 2 insertions, 6 deletions

diff --git a/mesonbuild/compilers/mixins/intel.py b/mesonbuild/compilers/mixins/intel.py
index cbbfc7a73..b83e5c484 100644
--- a/mesonbuild/compilers/mixins/intel.py
+++ b/mesonbuild/compilers/mixins/intel.py
@@ -28,8 +28,6 @@ from .gnu import GnuLikeCompiler
 from .visualstudio import VisualStudioLikeCompiler
 
 if T.TYPE_CHECKING:
-    import subprocess  # noqa: F401
-
     from ...arglist import CompilerArgs
     from ...dependencies import Dependency
     from ...environment import Environment
@@ -115,8 +113,7 @@ class IntelGnuLikeCompiler(GnuLikeCompiler):
             '-diag-error', '10157',  # Ignoring argument of the wrong type
             '-diag-error', '10158',  # Argument must be separate. Can be hit by trying an option like -foo-bar=foo when -foo=bar is a valid option but -foo-bar isn't
         ]
-        ret = super().compiles(code, env, extra_args=extra_args, dependencies=dependencies, mode=mode, disable_cache=disable_cache)  # type: ignore
-        return T.cast(T.Tuple[bool, bool], ret)
+        return super().compiles(code, env, extra_args=extra_args, dependencies=dependencies, mode=mode, disable_cache=disable_cache)
 
     def get_profile_generate_args(self) -> T.List[str]:
         return ['-prof-gen=threadsafe']
@@ -176,8 +173,7 @@ class IntelVisualStudioLikeCompiler(VisualStudioLikeCompiler):
                 '/Qdiag-error:10157',  # Ignoring argument of the wrong type
                 '/Qdiag-error:10158',  # Argument must be separate. Can be hit by trying an option like -foo-bar=foo when -foo=bar is a valid option but -foo-bar isn't
             ])
-        ret = super().compiles(code, env, extra_args=extra_args, dependencies=dependencies, mode=mode, disable_cache=disable_cache)  # type: ignore
-        return T.cast(T.Tuple[bool, bool], ret)
+        return super().compiles(code, env, extra_args=extra_args, dependencies=dependencies, mode=mode, disable_cache=disable_cache)
 
     def get_toolset_version(self) -> T.Optional[str]:
         # Avoid circular dependencies....