Support multiple python versions for code generation

codegen/datatypes.py

@@ -1,6 +1,6 @@
 from enum import Enum
 from pathlib import Path
-from typing import Optional, Union
+from typing import Optional, Union, List
 from dataclasses import dataclass, field
 
 
@@ -70,7 +70,7 @@ class CEnumVal:
 @dataclass
 class CEnum:
     name: str
-    values: list[CEnumVal]
+    values: List[CEnumVal]
     typedef: bool = False
 
     def __str__(self) -> str:
@@ -100,8 +100,8 @@ class CMacro:
 @dataclass
 class CStruct:
     name: str
-    cargs: list["CArg"]
-    typedef_name: str | None = None
+    cargs: List["CArg"]
+    typedef_name: Optional[str] = None
 
     def __str__(self) -> str:
         return self.declare() + self.define()
@@ -145,10 +145,10 @@ class CArg:
 class CFunc:
     name: str
     ret_type: CDataType
-    args: list[CArg]
+    args: List[CArg]
     body: str
     pointer: CPointer = field(default_factory=CPointer)
-    qualifiers: list[CQualifier] = field(default_factory=list)
+    qualifiers: List[CQualifier] = field(default_factory=list)
 
     def __str__(self) -> str:
         qualifiers = ""
@@ -203,8 +203,8 @@ class CInclude:
 class CFile:
     name: str
     extension: str
-    decl_types: list[CStruct] = field(default_factory=list)
-    macros: list[CMacro] = field(default_factory=list)
+    decl_types: List[CStruct] = field(default_factory=list)
+    macros: List[CMacro] = field(default_factory=list)
 
     def save(self, output_dir: Path):
         output_file = output_dir / f"{self.name}.{self.extension}"
@@ -223,9 +223,9 @@ class CFile:
 @dataclass
 class CHeader(CFile):
     extension: str = "h"
-    includes: list[CInclude] = field(default_factory=list)
-    types: list[CUserType] = field(default_factory=list)
-    funcs: list[CFunc] = field(default_factory=list)
+    includes: List[CInclude] = field(default_factory=list)
+    types: List[CUserType] = field(default_factory=list)
+    funcs: List[CFunc] = field(default_factory=list)
 
     def __str__(self) -> str:
         name_upper = self.name.upper()
@@ -275,10 +275,10 @@ class CHeader(CFile):
 @dataclass
 class CSource(CFile):
     extension: str = "c"
-    includes: list[CInclude] = field(default_factory=list)
-    types: list[CUserType] = field(default_factory=list)
-    internal_funcs: list[CFunc] = field(default_factory=list)
-    funcs: list[CFunc] = field(default_factory=list)
+    includes: List[CInclude] = field(default_factory=list)
+    types: List[CUserType] = field(default_factory=list)
+    internal_funcs: List[CFunc] = field(default_factory=list)
+    funcs: List[CFunc] = field(default_factory=list)
 
     def __str__(self) -> str:
         includes = _get_includes_string(self.includes)
@@ -333,7 +333,7 @@ def get_datatype_string(_type: CDataType) -> str:
         return _type
 
 
-def _get_includes_string(includes: list[CInclude]) -> str:
+def _get_includes_string(includes: List[CInclude]) -> str:
     output = ""
     for include in sorted(includes, key=lambda inc: inc.local, reverse=True):
         output += str(include)