feat[cartesian]: Loops over data dimensions

src/gt4py/cartesian/backend/pyext_builder.py

@@ -98,6 +98,11 @@ def get_gt_pyext_build_opts(
         "-std=c++20",
         f"-ftemplate-depth={gt_config.build_settings['cpp_template_depth']}",
         *extra_compile_args_from_config["cuda"],
+        *(
+            arg
+            for cxx_compile_arg in extra_compile_args["cxx"]
+            for arg in f"--compiler-options {cxx_compile_arg}".split(" ")
+        ),
     ]
     if is_rocm_gpu:
         extra_compile_args["cuda"] += [

src/gt4py/cartesian/frontend/defir_to_gtir.py

@@ -39,6 +39,8 @@
     Expr,
     FieldDecl,
     FieldRef,
+    For,
+    ForIndex,
     HorizontalIf,
     If,
     IterationOrder,
@@ -582,6 +584,19 @@ def visit_While(self, node: While) -> gtir.While:
             loc=location_to_source_location(node.loc),
         )
 
+    def visit_ForIndex(self, node: ForIndex) -> gtir.ForIndex:
+        return gtir.ForIndex(name=node.name, dtype=common.DataType(node.data_type.value))
+
+    def visit_For(self, node: For) -> gtir.For:
+        return gtir.For(
+            index_name=node.index_name,
+            iter_start=node.iter_start,
+            iter_stop=node.iter_stop,
+            iter_step=node.iter_step,
+            body=self.visit(node.body),
+            loc=location_to_source_location(node.loc),
+        )
+
     def visit_VarRef(self, node: VarRef, **kwargs) -> gtir.ScalarAccess:
         return gtir.ScalarAccess(name=node.name, loc=location_to_source_location(node.loc))