Add __future__ to ignored modules list

trans/transpiler/phases/emit_cpp/module.py

@@ -17,7 +17,7 @@ class ModuleVisitor(BlockVisitor):
     includes: list[str] = field(default_factory=list)
     def visit_Import(self, node: ast.Import) -> Iterable[str]:
         for alias in node.names:
-            if alias.name in ("typon", "typing"):
+            if alias.name in {"typon", "typing", "__future__"}:
                 yield ""
             else:
                 yield from self.import_module(alias.name)
@@ -28,7 +28,7 @@ class ModuleVisitor(BlockVisitor):
         yield ""
 
     def visit_ImportFrom(self, node: ast.ImportFrom) -> Iterable[str]:
-        if node.module in ("typon", "typing"):
+        if node.module in {"typon", "typing", "__future__"}:
             yield ""
         else:
             yield from self.import_module(node.module)

trans/transpiler/phases/typing/block.py

@@ -30,7 +30,7 @@ class ScoperBlockVisitor(ScoperVisitor):
             self.scope.vars[alias.asname or alias.name] = dataclasses.replace(mod, kind=VarKind.LOCAL)
 
     def visit_ImportFrom(self, node: ast.ImportFrom):
-        if node.module == "typing":
+        if node.module in {"typing", "__future__"}:
             return
         module = self.scope.get(node.module, VarKind.MODULE)
         if not module: