Update codegen to support accepting JSON file as input

codegen/dbl_list/make_dbl_list.py

@@ -1,6 +1,6 @@
 from pathlib import Path
 from dataclasses import dataclass, field
-from typing import List, Dict
+from typing import List, Dict, Any, Type
 from codegen.constants import WAPP_SRC_ROOT
 from codegen.utils import load_func_body_from_file, convert_to_relative
 from codegen.datatypes import (
@@ -16,17 +16,25 @@ from codegen.datatypes import (
     CPointerType,
     CQualifier,
     CInclude,
+    SerialisableDataclass,
     get_datatype_string,
 )
 
 
 @dataclass
-class DblListData:
+class DblListData(SerialisableDataclass):
     node_typename: str
     list_typename: str
     hdr_decl_types: List[CStruct] = field(default_factory=list)
     src_decl_types: List[CStruct] = field(default_factory=list)
 
+    @classmethod
+    def from_dict(cls: Type["DblListData"], d: Dict[str, Any]) -> "DblListData":
+        data = DblListData(**d)
+        data.hdr_decl_types = [CStruct.from_dict(v) for v in data.hdr_decl_types if isinstance(v, dict)]
+        data.src_decl_types = [CStruct.from_dict(v) for v in data.src_decl_types if isinstance(v, dict)]
+        return data
+
 
 def make_dbl_list(user_datatypes: Dict[CDataType, DblListData] = {}):
     def __format_func_body(